3-Hydroxyglutarate and β,γ-Epoxy Esters as Substrates for Pig Liver Esterase (PLE) and α-Chymotrypsin
作者:Peter Mohr、Lukas Rösslein、Christoph Tamm
DOI:10.1002/hlca.19870700118
日期:1987.2.4
The pH dependence of the α-chymotrypsin-catalyzedhydrolysis of dimethyl 3-hydroxyglutarate (3) has been studied. The e.e. was determined by HPLC analysis of diastereoisomeric camphanoic-acid derivatives. Kinetic resolution of the β,α-epoxy esters 10 and 24 by pig liver esterase has been shown to provide an alternative access to chiral β-hydroxy esters and acids of high optical purity. By this latter
Studies Directed toward the Synthesis of Phomenoic Acid. Part 1. Enantioselective synthesis of the C(1)-to-C(6) segment
作者:Hammed H. A. M. Hassan、Christoph Tamm
DOI:10.1002/hlca.19940770323
日期:1994.5.11
analysis, a concept for the synthesis of all stereoisomers of the C(1)-to-C(6) segment of phomenoic acid has been developed. Both enantiomers of the chiral synthon 9 were prepared starting from rac-epoxy-diester 10. They were converted to both enantiomers of the epoxyalcohol, 16 and 21, respectively, using Sharpless epoxydation. They served as building blocks for the synthesis of the tetrol derivatives