Month: February 2023

Synthesis of isomeric 3-aminopyridopyrimidin-4(3H)ones was written by Stanovnik, B.;Tisler M.. And the article was included in Croatica Chemica Acta in 1972.Quality Control of Methyl 2-aminonicotinate This article mentions the following:

Structural assignments of the title compounds (I, II) obtained from H2NNH2 and III or IV resp. were achieved by chem. evidence and interpretation of ir, NMR and mass spectra. III and IV (R1 = CO2Et, CN) were prepared from esters of 2-aninopyridine-3-carboxylic (V) or 3-aminopyridine-2-carboxylic acids (VI) by heating with diethyl ethoxymethylene malonate or ethyl ethoxymethylenecyanacetate (VII). The ratio of cis:trans isomers in III (R1 = CN) prepared from V and VII was (NMR) 閳?:2. Treatment of III or IV with excess H2NNH2H2O in EtOH at room temperature gave I (R = NH2), or II (R = NH2) resp. I and II (R = NH2) were also obtainable from the condensation products of V or VI with Me2NCH(OMe)2 followed by a similar treatment with H2NNH2H2O. 2-Aminonicotinic acid hydrazide and diethoxymethyl acetate cyclized into I (R = N:CHOEt) which upon hydrolysis gave I (R = NH2). Treatment of I or II (R = NH2) with amyl nitrite gave I (R = H), which was treated with AC2O-pyridine to give I or II (R = NHAc) especially Condensation of V with cis- trans-2,5-diethoxy-tetrahydrofuran in AcOH under reflux gave 3-carbomethoxy-2-(N-pyrrolo)pyridine, which with polyphosphoric acid underwent pyrrole elimination to give methyl 2-aminopyridine-3-carboxylate. In the experiment, the researchers used many compounds, for example, Methyl 2-aminonicotinate (cas: 14667-47-1Quality Control of Methyl 2-aminonicotinate).

Methyl 2-aminonicotinate (cas: 14667-47-1) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Quality Control of Methyl 2-aminonicotinate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Porphyrins. VI. The relative reactivities of substituted pyrroles was written by Badger, G. M.;Harris, R. L. N.;Jones, R. Alan. And the article was included in Australian Journal of Chemistry in 1964.Formula: C8H11NO2 This article mentions the following:

The comparative reactivities of a series of substituted pyrroles was examined by use of the diazo-coupling reaction and the Ehrlich reaction. The method used was that of Treibs and Fritz (CA 52, 13705g), but some modifications were introduced, p-AcNHC₆H₄N₂Cl was used instead of p-PhNHC₆H₄N₂Cl, and PhN₂Cl and 2,4,6-Br₃C₆H₂N₂OAc were included to improve the accuracy of classification. Six aryldiazonium salts (I-VI) were used. With I-IV the reaction was carried out by mixing an alc. solution of the pyrrole (5 mL. 1.5 鑴?10^-3M) with an aqueous solution of the diazonium salt (0.15 mL., 5 鑴?10^-2M) and with V-VI an HOAc solution of the pyrrole was mixed with an HOAc solution of the Na salt of the anti-diazotate, both with and without the addition of HCl (0.15 mL., 2N). Tests were carried out at pH 3, 5, and 7 with the following pyrroles (substituents given): 3-Me; 2,4-Me₂; 3-CO₂Et; 2,4-Me₂, 3-CO₂Et; 2-Z, 3-Me, 4-CO₂Et; 2-Q, 3-Me, 4-Ac; 3-CO₂Et, 4-Me; 3-Ac, 4-Me; 2-CO₂Et, 3,4-Me₂; 2-CO₂Et, 3,5-Me₂; 2-CO₂Et, 3,5-Me₂; 2-CO₂Et, 3-CH₂CH₂CO₂Et, 5-Me; 2-CO₂Et; 2-CH:C(CN)₂, 3,4-Me₂; 2-CH:C(CN)₂, 3-CH₂CH₂-CO₂Et, 4-Me; 2-CH:C(CN)₂, 4-Me; 2-CH:C(CN)₂, 3-Me; and 2-CH:C(CN)₂. The results showed that the dicyanovinyl group exerted a very pronounced deactivating influence on pyrroles. The dicyanovinyl group was much more deactivating than an ethoxycarbonyl group. Most of the pyrroles used were prepared earlier. Other pyrroles were prepared as follows: A solution of 50 g. 2-carboxy-3-ethoxycarbonyl-4-methylpyrrole in ethanol-amine was refluxed 1 h. and poured into 1 l. H₂O, the mixture extracted 24 h. with ether, and the aqueous solution acidified with dilute HCl to give 36 g. 2-carboxy-3-(2-hydroxyethylcarbonyl)-4-methylpyr-role (VII), m. 219鎺?(decomposition) (EtOH). VII (2.5 g.) in 10 mL. 25% aqueous NaOH was heated 15 h. in a sealed tube at 140-50鎺? the mixture extracted with ether, and the extract dried and evaporated to yield 0.67 g. 3-methylpyrrole (VIII), b. 142-3鎺? Formylation of VIII by the Vilsmeier-Haack method at 0鎺?yielded 2-formyl-3-methylpyrrole (IX), m. 92鎺? Condensation of 0.1 g. IX with 0.05 g. malononitrile in a few drops MeOH and I drop Et₂NH yielded 2-(-dicyanovinyl)-3-methylpyrrole, m. 194.5-5.5鎺?(decomposition) (MeOH). A mixture of 1 g. 2-ethoxycarbonyl-3,4-dimethylpyrrole, 1 mL. EtOH, and 10 mL. 10% aqueous KOH was refluxed 90 min. and the solution cooled and brought to pH 5-6 (HOAc) to yield 0.8 g. 2-carboxy-3,4-dimethylpyrrole (X). Refluxing 5 g. X and 5 mL. ethanolamine 1 h. and working up the mixture yielded 2.56 g. 3,4-dimethylpyrrole (XI), b₇₆₀ 164-6鎺? m. 32-3鎺? Formylation of XI (as in VIII) yielded 2-formyl-3,4-dimethylpyrrole (XII), m. 129-30鎺? XII was converted into 2-(-dicyanovinyl)-3,4-dimethylpyrrole by the method of Fischer and Hoefelman (CA 32, 3389₄). In the experiment, the researchers used many compounds, for example, Ethyl 4-methyl-1H-pyrrole-3-carboxylate (cas: 2199-49-7Formula: C8H11NO2).

Ethyl 4-methyl-1H-pyrrole-3-carboxylate (cas: 2199-49-7) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Formula: C8H11NO2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Organic synthesis by use of inorganic salts. XII. Preparation of esters of carboxylic acids in dimethylformamide was written by Yoneda, Shigeo;Yoshida, Zenichi;Fukui, Kenichi. And the article was included in Kogyo Kagaku Zasshi in 1966.Computed Properties of C11H20O4 This article mentions the following:

The reaction of organic halides with RCO2K or RCO2Na proceeds readily in HCONMe2 (I) or Me2SO (II). BuBr (III) treated with AcOK (IV) 2 hrs. at 90-100鎺?in I or II to give AcOBu in 98 or 95% yields. The following esters of carboxylic acids were synthesized by the reaction of organic halides with RCO2K or RCO2Na in I or II [halides, solvents, RCO2K or RCO2Na, reaction temperature, reaction time, and % yield of ester given]: BuF, I, IV, 90-100鎺? 2 hrs., 0; BuF, II, IV, 90-100鎺? 2 hrs., 0; BuCl, I, IV, 90-100鎺? 2 hrs., 19; BuCl, II, IV, 90-100鎺? 2 hrs., 35; BuI, I, IV, 90-100鎺? 2 hrs., 96; BuI, II, IV, 90-100鎺? 2 hrs., 95; III, EtOH, IV, 90-100鎺? 2 hrs., 21; III, HOCH2CH2OH, IV, 90-100鎺? 2 hrs., 17; III, MeCN, IV, 90-100鎺? 2 hrs., 12; III, Me2CO, IV, 70-80鎺? 2 hrs., 39; III, AcNMe2, IV, 90-100鎺? 2 hrs., 98; MeI, I, IV, 30鎺? 4 hrs., 99; EtBr, I, IV, 30鎺? 4 hrs., 98; PrI, I, IV, 90-100鎺? 2 hrs., 97; n-C6H13Br, I, IV, 90-100鎺? 4 hrs., 92; n-C8H17Br, I, IV, 90-100鎺? 8 hrs., 90; CH2:CHCH2Br, I, IV, 30鎺? 2 hrs., 98; CH2:CMeCH2Br, I, IV, 30鎺? 2 hrs., 95; MeCH:CHCH2Br, I, IV, 30鎺? 2 hrs., 95; Ph-CH2Br, I, IV, 30鎺? 2 hrs., 96; III, I, HCO2K, 90-100鎺? 2 hrs., 97; III, I, EtCO2K, 90-100鎺? 4 hrs., 93; III, I, PrCO2K, 90-100鎺? 4 hrs., 90; III, I, BuCO2K, 90-100鎺? 4 hrs., 90; III, I, iso-BuCO2K, 90-100鎺? 4 hrs., 88; III, I, PhCH2CO2K, 90-100鎺? 4 hrs., 95; III, I, CH2:CHCO2K, 90-100鎺? 4 hrs., 92; III, I, MeCH:CHCH:CHCO2K, 90-100鎺? 4 hrs., 90; III, I, PhCH:-CHCO2K, 90-100鎺? 4 hrs., 88; III, I, (KO2C)2, 90-100鎺? 8 hrs., 82; III, I, NaO2CCH2CO2Na, 90-100鎺? 8 hrs., 67; III, I, (NaO2-CCH2)2, 90-100鎺? 8 hrs., 75; III, I, NaO2C(CH2)3CO2NA, 90-100鎺? 8 hrs., 65; III, I, KO2C(CH2)4CO2K, 90-100鎺? 8 hrs., 81; EtBr, I, KO2C(CH:CH)2CO2K, 90-100鎺? 8 hrs., 78; EtBr, I, PhCO2Na, 50-60鎺? 8 hrs., 93; EtBr,I, PhCO2K (V), 50-60鎺? 8 hrs., 94%; III, I, V, 90-100鎺? 8 hrs., 96; n-C6H13Br, I, V, 90-100鎺? 8 hrs., 90; CH2:CHCH2Br, I, V, 90-100鎺? 2 hrs., 97; PhCH2Br, I, V, 90-100鎺? 2 hrs., 93; BrCH2CH2Br, I, IV, 90-100鎺? 8 hrs., 88; Br(CH2)3Br, I, IV, 90-100鎺? 8 hrs., 85; Br(CH2)4Br, I, IV, 90-100鎺? 8 hrs., 80; o-C6H4(CH2Cl)2 (VI), I, IV, 12鎺? 80 hrs., 80; VI, I, K2CO3, 12鎺? 21 hrs., 21; EtBr, I, o-C6H4-(CO2K)2 (VII), 150鎺? 4 hrs., 82; III, I, VII, 150鎺? 4 hrs., 69; III, I, m-C6H4(CO2K)2, 150鎺? 4 hrs., 85; III, I, p-C6H4(CO2K)2, 150鎺? 4 hrs., 83; n-C6H13Br, I, VII, 150鎺? 8 hrs., 75; n-C8H17Br, I, VII, 150鎺? 8 hrs., 72; CH2:CHCH2Br, I, VII, 100鎺? 8 hrs., 61; Ph-CH2Br, I, VII, 100鎺? 8 hrs., 58; BrCH2CH2Br, I, VII, 150鎺? 4 hrs., 85. Treatment of 0.2 mole p-C6H4(CO2K)2 with 0.2 mole Br-CH2CH2Br afforded poly(ethylene terephthalate), m. 242鎺? In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Computed Properties of C11H20O4).

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Computed Properties of C11H20O4

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

One pot cascade synthesis of fused heterocycles from furan-tethered terminal alkynes and aldehydes in the presence of amines and CuBr was written by Zhang, Yan-Yan;Hao, Jian;Shi, Min. And the article was included in Organic Chemistry Frontiers in 2015.Recommanded Product: 17920-23-9 This article mentions the following:

A one-pot protocol for the construction of complex heterocycles through furan-tethered terminal alkynes, aldehydes, amines and CuBr upon heating was developed, giving the cycloadducts in moderate to high yields along with moderate to good regioselectivities. The reactions proceed through a two-component domino reaction, including allenation and subsequent intramol. Diels-Alder reaction. A wide range of aliphatic or aromatic aldehydes and furan-tethered terminal alkynes were well-tolerated, enriching the chem. of the intramol. Diels-Alder reaction related to furan. In the experiment, the researchers used many compounds, for example, Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9Recommanded Product: 17920-23-9).

Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Recommanded Product: 17920-23-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Phytotoxic activity of Moldavian dragonhead (Dracocephalum moldavica L.) essential oil and its possible use as bio-herbicide was written by Pouresmaeil, Mohammad;Sabzi-Nojadeh, Mohsen;Movafeghi, Ali;Aghbash, Behzad Nezhadasad;Kosari-Nasab, Morteza;Zengin, Gokhan;Maggi, Filippo. And the article was included in Process Biochemistry (Oxford, United Kingdom) in 2022.Application In Synthesis of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate This article mentions the following:

The incessant use of synthetic herbicides may cause several ecol. problems including environmental contamination and developing herbicide-resistant species. These concerns led to exploring new eco-friendly weed control strategies. Present study is aimed to assess the phytotoxic activity of Moldavian dragonhead, Dracocephalum moldavica L., essential oil (EO) on Bromus tectorum L. All experiments were carried out as a completely randomized design with three replications. The EO of D. moldavica was analyzed using gas chromatog. coupled with mass spectrometry (GC-MS). The outcomes of GC-MS showed that geranyl acetate (32.57%), geranial (24.50%), neral (22.65%), and geraniol (8.78%) are the major bioactive compounds of EO. As a result of treatment of B. tectorum with EO, seed germination and plantlet growth parameters were reduced in a concentration-dependent manner, and were completely suppressed with an essential oil concentration of 2娓璍/mL. The content of pigments was also reduced in a dose-dependent manner. Although, antioxidant enzymes activities were enhanced in low concentrations of the EO, they were inhibited in high concentrations especially at 2娓璍/mL. H2O2 and malondialdehyde content as well as electrolyte leakage were enhanced with the increasing concentration of EO. Overall, the outcomes of present study suggest that essential oil of D. moldavica can be used industrially to develop bio-herbicides owing to its noteworthy phytotoxic activity and weed killer potential. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Application In Synthesis of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate).

(E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is 绾?valerolactone.Application In Synthesis of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Morphological and structural properties of isotactic polypropylene filled with nano-zinc oxide as investigated by dynamic rheology, creep and recovery in shear was written by Liu, Jingru;Liang, Hongwei. And the article was included in Polymer Bulletin (Heidelberg, Germany) in 2022.Computed Properties of C73H108O12 This article mentions the following:

Morphol. and structural properties of nano-zinc oxide/isotactic polypropylene (nano-ZnO/iPP) composites with different nano-ZnO concentrations before and after compatibilization were investigated by SEM, dynamic rheol., shear creep and creep-recovery measurements. The complex viscosity and storage modulus of the composite melts first decrease and then increase with increasing nano-ZnO loading. The pseudo-solid-like behavior appearing in high-loaded composites could be attributed to the formation of the filler percolation network resulting from particle-particle interactions. The incorporating of maleic anhydride/styrene-grafted random copolypropylene (MPP) brings about the reduction of the number of big agglomerates of nano-ZnO, followed by the decrease in modulus and viscosity. Large nano-ZnO agglomerates or more complete percolation network formation enhances the creep resistance of iPP. This finding is explained by the existence of long relaxation time in the high-loaded system assigned to the relaxation of the iPP chains attached to the particle surface. Moreover, MPP has a pronounced influence on the shear creep and recovery behavior of the composites. Weighted relaxation spectra calculated from the dynamic frequency sweep together with shear creep and recovery curves quantify these assumptions. Dynamic rheol. and shear creep and creep-recovery measurements are sensitive tools to get insights into the dispersion state of nanoparticles in the polymer composites, as well as the interactions (i.e., particle-polymer interaction, particle-particle interaction) in such systems. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Computed Properties of C73H108O12).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Computed Properties of C73H108O12

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Electrochemical Oxidative Cyclization: Synthesis of Polysubstituted Pyrrole from Enamines was written by Chen, Zhiwei;Shi, Guang;Tang, Wei;Sun, Jie;Wang, Wenxing. And the article was included in European Journal of Organic Chemistry in 2021.Category: esters-buliding-blocks This article mentions the following:

A conceptually novel method for the preparation of pyrrole is described by electrochem.-oxidation-induced intermol. annulation via enamines. In a simple undivided cell, based on a sodium acetate-facilitated, polysubstituted pyrrole derivations has been facilely synthesized under external oxidant-free condition. This electrosynthetic approach providing an environmentally benign protocol for C-C bond cross-coupling and oxidative annulation, which features unparalleled broad scope of substrates and practicality. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8Category: esters-buliding-blocks).

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Development of Orally Active Oxytocin Antagonists: Studies on 1-(1-{4-[1-(2-Methyl-1-oxidopyridin-3-ylmethyl)piperidin-4-yloxy]-2-methoxybenzoyl}piperidin-4-yl)-1,4-dihydrobenz[d][1,3]oxazin-2-one (L-372,662) and Related Pyridines was written by Bell, Ian M.;Erb, Jill M.;Freidinger, Roger M.;Gallicchio, Steven N.;Guare, James P.;Guidotti, Maribeth T.;Halpin, Rita A.;Hobbs, Doug W.;Homnick, Carl F.;Kuo, Michelle S.;Lis, Edward V.;Mathre, David J.;Michelson, Stuart R.;Pawluczyk, Joseph M.;Pettibone, Douglas J.;Reiss, Duane R.;Vickers, Stanley;Williams, Peter D.;Woyden, Carla J.. And the article was included in Journal of Medicinal Chemistry in 1998.Related Products of 28478-46-8 This article mentions the following:

The previously reported oxytocin antagonist L-371,257 has been modified at its acetylpiperidine terminus to incorporate various pyridine N-oxide groups. This modification has led to the identification of compounds with improved pharmacokinetics and excellent oral bioavailability. The pyridine N-oxide series is exemplified by L-372,662 (I), which possessed good potency in vitro (K_i = 4.1 nM, cloned human oxytocin receptor) and in vivo (i.v. AD₅₀ = 0.71 mg/kg in the rat), excellent oral bioavailability (90% in the rat, 96% in the dog), good aqueous solubility (>8.5 mg/mL at pH 5.2) which should facilitate formulation for i.v. administration, and excellent selectivity against the human arginine vasopressin receptors. Incorporation of a 5-fluoro substituent on the central benzoyl ring of this class of oxytocin antagonists enhanced in vitro and in vivo potency but was detrimental to the pharmacokinetic profiles of these compounds Although lipophilic substitution around the pyridine ring of I gave higher affinity in vitro, such substituents were a metabolic liability and caused shortfalls in vivo. Two approaches to prevent this metabolism, addition of a cyclic constraint and incorporation of trifluoromethyl groups, were examined The former approach was ineffective because of metabolic hydroxylation on the constrained ring system, whereas the latter showed improvement in plasma pharmacokinetics in some cases. In the experiment, the researchers used many compounds, for example, Methyl 4-Hydroxy-2-methoxybenzoate (cas: 28478-46-8Related Products of 28478-46-8).

Methyl 4-Hydroxy-2-methoxybenzoate (cas: 28478-46-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Related Products of 28478-46-8

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Competing O-H insertion and 灏?elimination in rhodium carbenoid reactions; synthesis of 2-alkoxy-3-arylpropanoates was written by Cox, Geoffrey G.;Haigh, David;Hindley, Richard M.;Miller, David J.;Moody, Christopher J.. And the article was included in Tetrahedron Letters in 1994.Related Products of 15399-05-0 This article mentions the following:

Rhodium(II) carboxylate catalyzed decomposition of diazo esters 3 (shown as I) and PhCH₂C(CO₂Et)N₂鑱?strong>4 in the presence of alcs. or water results in formation of 2-alkoxy- or 2-hydroxy-3-arylpropanoates, resp., by O-H insertion in competition with cinnamates by elimination; the ratio of insertion to elimination is dramatically affected by the carboxylate ligand on rhodium. Use of methanol-d as the alc. confirms that the alkene does not arise by elimination from the initial alkoxyester product. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0Related Products of 15399-05-0).

Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Related Products of 15399-05-0

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Antitumor Agents. 174. 2′,3′,4′,5,6,7-Substituted 2-Phenyl-1,8-naphthyridin-4-ones: Their Synthesis, Cytotoxicity, and Inhibition of Tubulin Polymerization was written by Chen, Ke;Kuo, Sheng-Chu;Hsieh, Ming-Chieh;Mauger, Anthony;Lin, Chii M.;Hamel, Ernest;Lee, Kuo-Hsiung. And the article was included in Journal of Medicinal Chemistry in 1997.Safety of Ethyl 3-oxo-3-(m-tolyl)propanoate This article mentions the following:

Two series of 2′,3′,4′,5,6,7-substituted 2-phenyl-1,8-naphthyridin-4-ones and 2-phenylpyrido[1,2-a]pyrimidin-4-ones have been synthesized and evaluated as cytotoxic compounds and as inhibitors of tubulin polymerization Most 2-phenyl-1,8-naphthyridin-4-ones showed potent cytotoxic and anti-tubulin activities, whereas 2-phenylpyrido[1,2-a]pyrimidin-4-ones showed no activity in either assay. In general, a good correlation was found between cytotoxicity and inhibition of tubulin polymerization in the 2-phenyl-1,8-naphthyridin-4-one series. The 2-phenyl-1,8-naphthyridin-4-ones with a methoxy group at the 3′-position showed potent cytotoxicity against most tumor cell lines with GI₅₀ values in the low micromolar to nanomolar concentration range in the National Cancer Institute’s 60 human tumor cell line in vitro screen. Introduction of substituents (e.g. F, Cl, CH₃, and OCH₃) at the 4′-position led to compounds with reduced or little activity and substitution at the 2′-position resulted in inactive compounds The effects of various A-ring substitutions on activity depend on the substitution in ring C. Compounds 44-50 were potent inhibitors of tubulin polymerization, with activity nearly comparable to that of the potent antimitotic natural products colchicine, podophyllotoxin, and combretastatin A-4. 2-Phenyl-1,8-naphthyridin-4-ones also inhibited the binding of radiolabeled colchicine to tubulin, but the inhibition was less potent than that obtained with the natural products. Further investigation is underway to determine if substitution at the 3′-position and multi-substitutions in ring C will result in compounds with increased activity. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Safety of Ethyl 3-oxo-3-(m-tolyl)propanoate).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120鎺?C閳ユ弲閳ユ彊 and O閳ユ弲閳ユ彊 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C閳ユ彊閳ユ弲 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Safety of Ethyl 3-oxo-3-(m-tolyl)propanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics