125354-93-0Relevant articles and documents
Novel protocol for the asymmetric synthesis of 3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one via bakers' yeast reduction
Komiyama, Takuzo,Takaguchi, Yutaka,Tsuboi, Sadao
, p. 147 - 151 (2007/10/03)
A novel protocol for the asymmetric synthesis of 3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one is reported. Darzens condensation reactions of anisaldehyde with dichloroacetates, followed substitution reaction of sodium o-nitrophenylthiolate and bakers' yeast reduction furnished 2-hydroxy-3-(4-methoxyphenyl)-3-(2-nitrophenylsulfanyl)-propionates. Further reduction of a nitro group and cyclization gave the title compound.
Enzymatic hydrolysis in organic solvents for kinetic resolution of water-insoluble α-acyloxy esters with immobilized lipases
Akita, Hiroyuki,Umezawa, Isao,Matsukura, Hiroko
, p. 272 - 278 (2007/10/03)
Enantioselective hydrolysis of water-insoluble α-acyloxy esters, (±)- 5 and (±)-6, was carried out using lipases immobilized with Celite or a synthetic prepolymer (ENTP-4000 or ENT-4000) in a water-saturated organic solvent to produce chiral intermediates, (2S,3S)-5 and (2S,3R)-4, for the synthesis of diltiazem hydrochloride 1 and (-)-indolmycin 2, respectively. Furthermore, enantioselective hydrolysis of (±)-6 using lipid-lipase aggregates in water-saturated organic solvent was also found to give (2S,3R)- 4.
ENZYMATIC HYDROLYSIS IN ORGANIC SOLVENTS FOR KINETIC RESOLUTION OF WATER-INSOLUBLE α-ACYLOXY ESTERS WITH IMMOBILIZED LIPASES
Akita, Hiroyuki,Enoki, Yuko,Yamada, Harutami,Oishi, Takeshi
, p. 2876 - 2878 (2007/10/02)
Asymmetric hydrolysis of water-insoluble α-acyloxy esters, (+/-)-5 and (+/-)-6, was carried out using lipases immobilized with celite or synthetic prepolymer (ENTP-4000 or ENT-4000) in water-saturated organic solvent to produce chiral intermediates, (2S,3