77564-44-4Relevant academic research and scientific papers
Enzyme-mediated enantioselective hydrolysis of soluble polymer-supported dendritic carbonates
Okudomi, Masayuki,Nogawa, Masaki,Chihara, Naoka,Kaneko, Makoto,Matsumoto, Kazutsugu
, p. 6642 - 6645 (2008)
The easy separation of optically active compounds from enzymatic kinetic resolution products by simple precipitation using poly(ethylene glycol) (PEG)-supported dendritic carbonates is disclosed. The water-soluble polymer-supported substrates were prepared by immobilization of (±)-1-phenylethanol onto a monomethoxy PEG (MPEG; av MW 5000) bearing a dendritic spacer through a carbonate linker. The enantioselective hydrolysis of the dendritic substrates of the 1st and 2nd generations using lipase from porcine pancreas (PPL; Type II, Sigma) smoothly proceeded, and a multimolecule of the corresponding (R)-alcohols was released from one molecule of the racemic substrates. The E values of the reactions at 0 °C in a mixed solvent (hexane/buffer = 9/1) were up to >200.
Stereoselective synthesis of resorcylic acid lactone Cochliomycin B
Nagalatha,Siva Ganesh,Venkat Narsaiah
, (2021/09/22)
The total synthesis of 14-membered resorcylic acid lactone, Cochliomycin B has prescribed, in a convergent manner, from readily available starting materials, D-galactose, L-aspartic acid and ethyl acetoacetate. The key reactions involved in the synthesis are Julia-Kocienski olefination, E-selective Horner-Wadsworth-Emmons olefination and intramolecular lactonization.
Stereoselective total synthesis of C2-symmetric natural products pyrenophorol and its derivatives
Narala, Siva Ganesh,Nagalatha,Venkat Narsaiah
supporting information, p. 2173 - 2178 (2019/03/11)
A stereoselective total synthesis of 16-membered C2-symmetric macrodiolide Pyrenophorol, Tetrahydropyrenophorol and 4,4-diacetylpyrenophorol have been accomplished. The synthesis started from commercially available L-Aspartic acid and the key reactions involved are regioselective epoxide opening, CBS reduction, Pinnick oxidation and Mitsunobu dilactonization.
ACYLATED CATECHIN POLYPHENOLS AND METHODS OF THEIR USE FOR THE TREATMENT OF CANCER
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Page/Page column 59, (2019/12/28)
Disclosed herein are acylated active agents and methods of their use, e.g., for modulating a cancer marker or for treating cancer.
ACTIVE AGENTS AND METHODS OF THEIR USE FOR THE TREATMENT OF METABOLIC DISORDERS AND NONALCOHOLIC FATTY LIVER DISEASE
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Page/Page column 67; 78, (2019/12/28)
Disclosed herein are active agents, compositions containing them, unit dosage forms containing them, and methods of their use, e.g., for treating a metabolic disorder or nonalcoholic fatty liver disease or for modulating a metabolic marker or nonalcoholic fatty liver disease marker.
MULTIBIOTIC AGENTS AND METHODS OF USING THE SAME
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Page/Page column 157, (2019/01/06)
Multibiotic agents are disclosed. The multibiotic agents may contain two or more moieties linked through bonds cleavable in vivo. The bonds cleavable in vivo can be ester bonds, amide bonds, azo bonds, glycosidic bonds, carbonate linkers, or carbamate linkers. The moieties can be alcohol cores, amine cores, and/or acyls. Also disclosed are compositions containing multibiotic agents and methods of using the multibiotic agents.
First Synthesis and Characterization of Stereoisomers of Choleretic Drug Dihydroxydibutylether
Yue, Qiming,Zhao, Yi,Sun, Baohou,Hai, Li,Guo, Li,Wu, Yong
, p. 1145 - 1152 (2015/11/02)
Dihydroxydibutylether (DHBE) is a choleretic drug used for the treatment of gallstone and hepatic disorders due to its choleretic activity and hepatoprotective action. The drug is a mixture of three regioisomers. The main regioisomer 3-(3-hydroxylbutoxy)-
Pheromone synthesis. Part 256: Synthesis of the four stereoisomers of 5,11-dimethylpentacosane, a new sex pheromone component of the male Galleria mellonella (L.), with high stereochemical purities as determined by the derivatization-HPLC analysis of the eight stereoisomers of 5,11-dimethyl-8-pentacosanol
Mori, Kenji,Akasaka, Kazuaki
, p. 4102 - 4115 (2015/06/02)
Abstract All the four stereoisomers of 5,11-dimethylpentacosane (>96.8% purity) were synthesized via the stereoisomers of 5,11-dimethyl-8-pentacosanol, whose stereoisomeric compositions could be determined precisely by their low temperature HPLC analysis after derivatization. 5,11-Dimethyl-8-pentacosanol was prepared by a Grignard reaction between 3-methylheptylmagnesium bromide and 4-methyloctadecanal, both of which were prepared from the commercially available enantiomers of citronellal (97-98% ee). Alternatively, (R)-3-methyl-1-heptanol could be prepared from methyl (R)-3-hydroxybutanoate (100% ee). Pd/C-catalyzed hydrogenation of a 5-methyl-1-alkene caused partial racemaization at C-5.
First stereoselective total synthesis of Neocosmosin A: A facile approach
Dachavaram, Soma Shekar,Kalyankar, Kondbarao Balasaheb,Das, Saibal
supporting information, p. 5629 - 5631 (2014/12/11)
First stereoselective concise synthesis of Neocosmosin A, with in vitro binding affinity for human opioid and cannabinoid receptors, has been reported using readily available starting materials such as methylacetoacetate, cyclohexanone, and homoallyl alco
Enzyme-mediated enantioselective hydrolysis of dicarboxylic acid monoesters
Kataoka, Noriyuki,Okudomi, Masayuki,Chihara, Naoka,Matsumoto, Kazutsugu
, p. 615 - 621 (2013/02/23)
The enzyme-mediated highly enantioselective hydrolysis of dicarboxylic acid monoesters was investigated. The racemic substrates, which were prepared by coupling of the corresponding alcohols with dicarboxylic anhydrides, were enantioselectively hydrolyzed by lipase from Candida antarctica (Novozym 435) in a buffer at 30 °C. The products were easily separated by a simple extraction procedure without laborious column chromatography to afford both enantiomers of the alcohols. We then determined that the dicarboxylic acid monoesters were suitable alternative substrates for the preparation of optically active alcohols.
