Month: December 2022

Site-Selective Acylation of Pyranosides with Oligopeptide Catalysts was written by Seitz, Alexander;Wende, Raffael C.;Roesner, Emily;Niedek, Dominik;Topp, Christopher;Colgan, Avene C.;McGarrigle, Eoghan M.;Schreiner, Peter R.. And the article was included in Journal of Organic Chemistry in 2021.Application of 604-69-3 The following contents are mentioned in the article:

Herein, we report the oligopeptide-catalyzed site-selective acylation of partially protected monosaccharides. We identified catalysts that invert site-selectivity compared to N-methylimidazole, which was used to determine the intrinsic reactivity, for 4,6-O-protected glucopyranosides (trans-diols) as well as 4,6-O-protected mannopyranosides (cis-diols). The reaction yields up to 81% of the inherently unfavored 2-O-acetylated products with selectivities up to 15:1 using mild reaction conditions. We also determined the influence of protecting groups on the reaction and demonstrate that our protocol is suitable for one-pot reactions with multiple consecutive protection steps. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3Application of 604-69-3).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) 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. 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.Application of 604-69-3

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

Novel substituted aminothiazoles as potent and selective anti-hepatocellular carcinoma agents was written by Lu, Huagang;Rogowskyj, John;Yu, Wenquan;Venkatesh, Anu;Khan, Noshena;Nakagawa, Shigeki;Goossens, Nicolas;Koh, Anna P.;Higashi, Takaaki;Gunasekaran, Ganesh;Schwarz, Myron E.;Hiotis, Spiros P.;Xu, Xiaodong;Kinney, William;Hoshida, Yujin;Block, Timothy;Cuconati, Andrea;Du, Yanming. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2016.Computed Properties of C7H14O3 The following contents are mentioned in the article:

Based on our previous identification of a disubstituted aminothiazole termed HBF-0079 with promising selective toxicity for HCC-derived cell lines vs. non-HCC liver lines, a series of tri-substituted aminothiazole derivatives were prepared and evaluated. This work resulted in the discovery of iso-Pr 4-(pyrazin-2-yl)-2-(pyrimidin-2-ylamino)thiazole-5-carboxylate (I), which displayed EC₅₀ value of 0.11 μM and more than 450 times of selectivity, and its Me carbonate prodrug with improved solubility in organic solvents. Furthermore, I was shown to reduce the proliferation of several liver cancer cells derived directly from patients. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Computed Properties of C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) 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.Computed Properties of C7H14O3

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

Synthesis of new chiral macrocycles-based glycolipids and its application in asymmetric Michael addition was written by Sabah, Karem J.;Zahid, N. Idayu;Hashim, Rauzah. And the article was included in Research on Chemical Intermediates in 2021.Application of 604-69-3 The following contents are mentioned in the article:

A series of new mix aza- and thia-macrocyclic glycolipids (9, 10, 16 and 17) have been synthesized and their enantiomeric selectivity was studied. The synthesis of the macrocycles involved a simple protection of two hydroxyl groups of the glycolipids followed by building up the mix-heteroatom macrocyclic in simple sequences. The macrocycles and previously investigated analogs (18, 19, 20 and 21) have been applied as phase transfer catalysts in the enantioselective Michael addition of 2-nitropropane to chalcone and showed good-to-excellent enantiomer excess (ee). Among the catalysts, the galactose aza-crown ether-based glycolipid 21 proved to be the most effective with 90% ee. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3Application of 604-69-3).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Application of 604-69-3

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

Successful reduction of off-target hERG toxicity by structural modification of a T-type calcium channel blocker was written by Choi, Yeon Jae;Seo, Jae Hong;Shin, Kye Jung. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2014.Application of 1061284-70-5 The following contents are mentioned in the article:

To obtain an optimized T-type calcium channel blocker with reduced off-target hERG toxicity, we modified the structure of the original compound by introducing a zwitterion and reducing the basicity of the nitrogen. Among the structurally modified compounds we designed, compounds 5 and 6, which incorporate amides in place of the original compound’s amines, most appreciably alleviated hERG toxicity while maintaining T-type calcium channel blocking activity. Notably, the benzimidazole amide 5 selectively blocked T-type calcium channels without inhibiting hERG (hERG/T-type â‰?220) and L-type channels (L-type/T-type = 96), and exhibited an excellent pharmacokinetic profile in rats. This study involved multiple reactions and reactants, such as Methyl 2-(4-bromophenyl)-3-methylbutanoate (cas: 1061284-70-5Application of 1061284-70-5).

Methyl 2-(4-bromophenyl)-3-methylbutanoate (cas: 1061284-70-5) 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. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Application of 1061284-70-5

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

Preparation and quality control of benorilate dispersible tablets was written by Zhang, Hua;Xu, Yuhua;Wang, Xiaona;Cheng, Suoming;Wu, Shuxia. And the article was included in Zhongguo Yaoye in 2011.Product Details of 5003-48-5 The following contents are mentioned in the article:

The preparation technol. and the quality control method of benorilate dispersible tablets were studied. The variety of auxiliary materials was selected by the disintegration time as index, and the 5 min accumulation of dissolution was determined by UV spectrophotometry. The optimal prescription was screened by the orthogonal design method. The optimal formulation contained 20% microcrystalline cellulose, 6.0% sodium carboxymethyl starch, 1.0% starch. Benorilate dispersible tablets prepared by the optimal prescription had better dissolution, 90% was dissol. in 15 min and complete disintegration was within 2.5 min, which accorded with the other indexes of the dispersible tablets. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Product Details of 5003-48-5).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) 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. 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.Product Details of 5003-48-5

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

Comparative studies of the acute and chronic toxicity of eterylate, benorylate and acetylsalicylic acid was written by Alonso, S.;Priego, J.;Maroto, L.;Ortega, P.. And the article was included in Archivos de Farmacologia y Toxicologia in 1978.Computed Properties of C17H15NO5 The following contents are mentioned in the article:

The acute toxicity of acetylsalicylic acid (I) [50-78-2], was greater than that of benorylate (II) [5003-48-5], and this was greater than that of eterylate (III) [62992-61-4]. In rats given 250 mg I or its equivalent of II or III/100 g, body weight was decreased by I and not affected by II or III. Gastric alterations and kidney lesions were some of the signs of chronic toxicity observed Coagulation time was increased most markedly in II-treated animals. No alterations in blood and liver parameters were noted. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Computed Properties of C17H15NO5).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) 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. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Computed Properties of C17H15NO5

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

Convenient synthesis of long alkyl-chain triazolylglycosides using ionic liquid as dual promoter-solvent: Readily access to non-ionic triazolylglycoside surfactants for evaluation of cytotoxic activity was written by Ketsomboon, Nutthanicha;Saeeng, Rungnapha;Srisook, Klaokwan;Sirion, Uthaiwan. And the article was included in Tetrahedron Letters in 2021.Related Products of 604-69-3 The following contents are mentioned in the article:

A convenient method for the one-pot synthesis of long alkyl-chain triazolylglycosides using ionic liquid as dual promoter and solvent is described via a sequential one-pot two-step glycosidation-CuAAc click reaction. The reaction was carried out using com. available substrates, including glycosyl bromides, sodium azide and various long alkyl-chain alkynes to achieve the corresponding products in moderate to high yields. Furthermore, this approach was successfully applied for the preparation of non-ionic mono-catenary triazolylglycoside surfactants in excellent yields through simple deacetylation. Subsequently, these surfactants were further evaluated for their cytotoxic activity. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3Related Products of 604-69-3).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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 604-69-3

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

Efficient syntheses of insect sex pheromones emitted by the boll weevil and the red bollworm moth was written by Wollenberg, Robert H.;Peries, Rohan. And the article was included in Tetrahedron Letters in 1979.Quality Control of (E)-Dodeca-9,11-dien-1-yl acetate The following contents are mentioned in the article:

Dimedone on sequential hydrazidation, treatment with aqueous K₂CO₃, hydrogenation, reaction with Z-LiCH:CHOEt (I), and rearrangement gave 44% of a 1:1 mixture of male boll weevil pheromones E– and Z-cyclohexylidene monoterpenoids II. CH₂:CHCH:CH(CH₂)₈OAc, a potent sex pheromone of the virgin female red bollworm moth, was prepared (36%) from CH₂:CH(CH₂)₈OH by sequential tetrahydropyranylation, OsO₄/NaIO₄ oxidation, reaction with I, rearrangement, Wittig methylenation, deprotection, and acetylation. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7Quality Control of (E)-Dodeca-9,11-dien-1-yl acetate).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Quality Control of (E)-Dodeca-9,11-dien-1-yl acetate

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

A highly stereoselective synthesis of (E)-1-substituted-1,3-dienes was written by Bloch, R.;Abecassis, J.. And the article was included in Tetrahedron Letters in 1982.Product Details of 50767-78-7 The following contents are mentioned in the article:

Alkylation of sulfone I (R = H) with RCH₂I [R = H, Bu, (CH₂)₇OR¹ (R¹ = tetrahydropyranyl)] gave I [R = Me, (CH₂)₄Me, (CH₂)₈OR¹] (II). Thermolysis of II in the vapor phase at 600-650° gave the corresponding (E)-RCH:CHCH:CH₂ (III) stereospecifically and in 85, 90, and 80-85% yield, resp., by retro-Diels-Alder reaction and in situ SO₂ extrusion. III [R = (CH₂)₈OAc] is a component of the sex pheromone of the red bollworm moth. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7Product Details of 50767-78-7).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. 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.Product Details of 50767-78-7

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

Chiral amorphous metal-organic polyhedra used as the stationary phase for high-resolution gas chromatography separations was written by Tang, Bo;Sun, Chenyu;Wang, Wei;Geng, Lina;Sun, Liquan;Luo, Aiqin. And the article was included in Chirality in 2020.Electric Literature of C8H16O2 The following contents are mentioned in the article:

Herein, we describe a new chiral amorphous metal-organic polyhedra used as the stationary phase for high-resolution gas chromatog. (GC). The chiral stationary phase was coated onto a capillary column via a dynamic coating process and investigated for a variety of compounds The exptl. results showed that the chiral stationary phase exhibits good selectivity for linear alkanes, linear alcs., polycyclic aromatic hydrocarbons, isomers, and chiral compounds In addition, the column has the advantages of high column efficiency and short anal. time. The present work indicated that amorphous metal-organic polyhedra have great potential for application as a new type of stationary phase for GC. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Electric Literature of C8H16O2).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C 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. Electric Literature of C8H16O2

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