Tag: 200-300

A novel palladium-catalyzed deoxygenation of ene diols to 1,3-dienes was written by Trost, Barry M.;Tometzki, Gerald B.. And the article was included in Synthesis in 1991.Quality Control of (E)-Dodeca-9,11-dien-1-yl acetate The following contents are mentioned in the article:

Hydroxylative Knoevenagel condensation of aldehydes followed by reduction provides a simple entry to 1,4-ene diols e.g. I (R = H). Subjecting the dicarbonate e.g. I (R = CO₂Me) to a Pd catalyst in the presence of (Me₂CHO)₃P achieves a mild vinylogous deoxygenation to (E)-1,3-dienes, e.g. II. Stereocontrolled synthesis of the sex pheromone of the red bollworm moth, (E)-9,11-dodecadienyl acetate, and a formal synthesis of the cotton boll weevil antifeedant, α-eleostearic acid, demonstrate the utility of this new methodol. 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 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. 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

Efficient Total Synthesis of Lycophyll (ψ,ψ-Carotene-16,16′-diol) was written by Jackson, Henry L.;Nadolski, Geoffry T.;Braun, Cristi;Lockwood, Samuel F.. And the article was included in Organic Process Research & Development in 2005.HPLC of Formula: 37905-02-5 The following contents are mentioned in the article:

A practical procedure is described for the total synthesis of lycophyll (16,16′-dihydroxy-lycopene; ψ,ψ-carotene-16,16′-diol), based on a C10 + C20 + C10 synthetic methodol. using the com. available materials geraniol (C10) and crocetindialdehyde (C20). A late-stage double Wittig olefination on crocetindialdehyde was used to form the desired lycophyll scaffold in eight linear synthetic steps, while generating a mixture of polyenic geometric isomers that could be effectively separated using HPLC. All-trans lycophyll was subsequently separated to >95% purity by semipreparative chromatog. using a C30 carotenoid column. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5HPLC of Formula: 37905-02-5).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) 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.HPLC of Formula: 37905-02-5

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

Asymmetric bromolactonization catalyzed by a C₃-symmetric chiral trisimidazoline was written by Murai, Kenichi;Matsushita, Tomoyo;Nakamura, Akira;Fukushima, Shunsuke;Shimura, Masato;Fujioka, Hiromichi. And the article was included in Angewandte Chemie, International Edition in 2010.Product Details of 149437-67-2 The following contents are mentioned in the article:

Enantioselective bromolactonization of 5-substituted 5-hexenoic acids catalyzed by the trisimidazoline have generated 6-(Bromomethyl)-6-aryltetrahydro-2H-pyran-2-ones e. g., I (R = Ph, 4-Cl-C₆H₄, 4-Br-C₆H₄, 4-F-C₆H₄, 4-Me-C₆H₄, 4-MeO-C₆H₄, 2,4-Me₂C₆H₃, 2-naphthyl, cyclohexyl). Debromination of 6-(bromomethyl)-6-(4-chlorophenyl)tetrahydro-2H-pyran-2-one leads to enantioselective derivatives II (R = H, SAc, N₃) and III. This study involved multiple reactions and reactants, such as Methyl 5-(4-fluorophenyl)-5-oxopentanoate (cas: 149437-67-2Product Details of 149437-67-2).

Methyl 5-(4-fluorophenyl)-5-oxopentanoate (cas: 149437-67-2) 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. Polyesters are important plastics, with monomers linked by ester moieties. 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. Product Details of 149437-67-2

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

Synthesis and biological activity of the sex pheromone components and their structural analogs of the click beetles Agriotes was written by Laats, Koit;Siirde, Kaarel;Kudryavtsev, Igor;Kogerman, Avo;Rang, Heino;Erm, Ants;Teng, Signe;Ismailov, Vladimir;Pristavko, Valeri. And the article was included in Eesti Teaduste Akadeemia Toimetised, Keemia in 1992.Category: esters-buliding-blocks The following contents are mentioned in the article:

The biol. active components of six species of the click beetle Agriotes – esters of geraniol, nerol, 8-hydroxygeraniol, (E,E)-farnesol as well as their structural isomers – were synthesized. The relationship between the isomeric composition of the synthesized compounds or their mixtures and the sex behavior of the most harmful species, viz., A. gurgistanus F., A. sputator L., A. lineatus L. (two subspecies), A. obscurus L., A. ustulatus S., A. tauricus Heyd., was established. On this basis optimum synthesis paths were chosen and attractant compositions developed for monitoring click beetles by means of pheromone traps. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Category: esters-buliding-blocks).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) 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. 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.Category: esters-buliding-blocks

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

Studies on monoterpene glucosides and related natural products. XXXVII. Biosynthesis of the iridoid glucosides in Lamium amplexicaule, Deutzia crenata and Galium spurium var. echinospermon was written by Inouye, Hiroyuki;Ueda, Shinichi;Uesato, Shinichi;Kobayashi, Koji. And the article was included in Chemical & Pharmaceutical Bulletin in 1978.Category: esters-buliding-blocks The following contents are mentioned in the article:

Administration of 10-hydroxygeraniol (I)-10–³H, iridodial (II)-10–³H, II–11–³H₂, II–10–³H glucoside, and II–11–³H to L. amplexicaule, D. crenata, and G. spurium var echinospermon established that lamioside (III) deutzioside, lamiide, and asperuloside are biosynthesized in these plants via I and II. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Category: esters-buliding-blocks).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) 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. 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.Category: esters-buliding-blocks

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

Nucleophilic Substitutions of Alcohols in High Levels of Catalytic Efficiency was written by Stach, Tanja;Draeger, Julia;Huy, Peter H.. And the article was included in Organic Letters in 2018.SDS of cas: 5444-75-7 The following contents are mentioned in the article:

A practical method for the nucleophilic substitution (S_N) of alcs. furnishing alkyl chlorides, bromides, and iodides under stereochem. inversion in high catalytic efficacy is introduced. The fusion of diethylcyclopropenone as a simple Lewis base organocatalyst and benzoyl chloride as a reagent allows notable turnover numbers up to 100. Moreover, the use of plain acetyl chloride as a stoichiometric promotor in an invertive S_N-type transformation is demonstrated for the first time. The operationally straightforward protocol exhibits high levels of stereoselectivity and scalability and tolerates a variety of functional groups. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7SDS of cas: 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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.SDS of cas: 5444-75-7

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

CuH-Catalyzed Regio- and Enantioselective Hydrocarboxylation of Allenes: Toward Carboxylic Acids with Acyclic Quaternary Centers was written by Feng, Sheng;Buchwald, Stephen L.. And the article was included in Journal of the American Chemical Society in 2021.Electric Literature of C13H10O3 The following contents are mentioned in the article:

We report a method to prepare α-chiral carboxylic acid derivatives, including those bearing all-carbon quaternary centers, through an enantioselective CuH-catalyzed hydrocarboxylation of allenes with a com. available fluoroformate. A broad range of heterocycles and functional groups on the allenes were tolerated in this protocol, giving enantioenriched α-quaternary and tertiary carboxylic acid derivatives in good yields with exclusive branched regioselectivity. The synthetic utility of this approach was further demonstrated by derivatization of the products to afford biol. important compounds, including the antiplatelet drug indobufen. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Electric Literature of C13H10O3).

Diphenyl carbonate (cas: 102-09-0) 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. 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 C13H10O3

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

Cobalt-Catalyzed Asymmetric Hydrogenation of 1,1-Diarylethenes was written by Chen, Jianhui;Chen, Chenhui;Ji, Chonglei;Lu, Zhan. And the article was included in Organic Letters in 2016.Computed Properties of C12H13FO3 The following contents are mentioned in the article:

Highly enantioselective cobalt-catalyzed hydrogenation of 1,1-diarylethenes was developed by using bench-stable chiral oxazoline iminopyridine-cobalt complexes as precatalysts. Thus, (vinylphenyl)pyrrole I gave (phenylethyl)pyrrole II in 97% yield and 92% ee. A unique o-chloride effect was observed to achieve high enantioselectivity. Easy removal as well as further transformations of the chloro group make this protocol a potentially useful alternative to synthesize various chiral 1,1-diarylethanes. This process can be successfully performed under 1 atm of hydrogen at room temperature on gram scale. This study involved multiple reactions and reactants, such as Methyl 5-(4-fluorophenyl)-5-oxopentanoate (cas: 149437-67-2Computed Properties of C12H13FO3).

Methyl 5-(4-fluorophenyl)-5-oxopentanoate (cas: 149437-67-2) 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. 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.Computed Properties of C12H13FO3

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

Pheromones. XXVI. Synthesis of sex attractants 7E-,9Z-dodecadienyl acetate, 9E,11-dodecadienyl acetate and 9Z,11E-tetradecadienyl acetate was written by Bestmann, Hans Juergen;Suss, J.;Vostrowsky, O.. And the article was included in Tetrahedron Letters in 1979.Product Details of 50767-78-7 The following contents are mentioned in the article:

Title compds R(CH:CH)₂(CH₂)_nOAc [R = Et, n = 6 (I), 8; R = H, n = 8] were prepared by stereoselective Wittig reactions. E.g., I was prepared from cycloheptanone enol Me ether by ozonolysis, followed by Wittig reaction with Ph₃P:CHCHO to give E-OCHCH:CH(CH₂)₅CO₂Me. Carbonyl olefination with Ph₃P⁺Pr Br^–/NaN(SiMe₃)₂ gave 7E,9Z-Et(CH:CH)₂(CH₂)₅CO₂Me, which on reduction and acetylation gave I. 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 typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. 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.Product Details of 50767-78-7

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

Stable Organic Titanium Catalysts and Reactive Distillation Used for the Transesterification of Dimethyl Carbonate with Phenol was written by Shen, Weihua;Ge, Qing;Gu, Kaijie;Nie, Yingying;Jiao, Linyu;Zhu, Zhiqing;Fang, Yunjin. And the article was included in Chemical Engineering & Technology in 2020.Formula: C13H10O3 The following contents are mentioned in the article:

The transesterification of di-Me carbonate with phenol to Me Ph carbonate (MPC) was investigated on novel catalysts such as titanium diisopropoxide bis(Et acetoacetate) and titanium dibutoxide bis(Et acetoacetate) in a closed batch reactor at 185-206°C under high pressure. The produced methanol could be removed efficiently by reactive distillation in order to overcome the equilibrium The prepared catalysts have higher resistance to water than titanium alkoxides. Phenol conversion as high as 86.4% with an MPC selectivity of 99.4% was achieved under optimal reaction conditions within 9 h. Most of the catalytic activity was retained after repeated use for ten times. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Formula: C13H10O3).

Diphenyl carbonate (cas: 102-09-0) 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.Formula: C13H10O3

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