Chiral induction in cyclopentyl-derived 1,3-meso-diesters: enantioselective hydrolyses with electric eel acetylcholinesterase
作者:Donald R Deardorff、Roberto B Amador、James W Morton、Henry Y Kim、Cullen M Taniguchi、Arnel A Balbuena、Sam A Warren、Vadim Fanous、S.W.Tina Choe
DOI:10.1016/s0957-4166(99)00236-0
日期:1999.6
Eight 1,3-meso-diesters derived from a common cyclopentyl backbone were exposed to the hydrolase enzyme acetylcholinesterase from Electrophorus electricus. All eight compounds were hydrolyzed by the enzyme. The overall enantioselectivities were quite high, and the resulting e.e.s were generally >90%. The absolute configurations of the product monoesters were determined through stereochemical correlation. These data revealed that the preferred site for enzymatic hydrolysis in seven of the substrates was the pro-S ester function, with pro-R cleavage detected in the eighth. (C) 1999 Elsevier Science Ltd. All rights reserved.
A correlation of configuration and19F-NMR Chemical Shifts of (R)-(+)-Mosher Esters of Chiral Cyclopentanediol Derivatives
作者:F. Theil、B. Costisella、H. Schick
DOI:10.1002/prac.19923340116
日期:——
Chemoenzymatic synthesis of enantiomerically pure β,γ-disubstituted γ-lactones
作者:Fritz Theil
DOI:10.1016/0957-4166(95)00214-a
日期:1995.7
The synthesis of enantiomericallypure β,γ-disubstituted γ-lactones is described based on the lipase-catalysed asymmetrisation of the cis-cyclopent-2-ene-1,4-diol derivatives 1 or 3. The cyclopentanones 7 and ent-7 have been obtained via epoxidation of the chiral monoacetates 2 or ent-2, respectively, followed by protecting group interconversion and oxidation. Baeyer-Villiger oxidation of 7 and ent-7