A Practical Stereoselective Synthesis of both Enantiomers of Threo- and Erythro-β-Hydroxy Norvaline from (S)-Serine Derivatives
摘要:
The four enantiopure diastereoisomers of beta-hydroxy norvaline have been prepared from L-serine in moderate chemical yield. The method is based on the diastereoselective addition of different organometallics to easily accessible serinal derivatives. (C) 2000 Elsevier Science Ltd. All rights reserved.
Asymmetric Synthesis of α-Amino-β-hydroxy Acids Using a Chiral Pyridoxal-Like Pyridinophane–Zinc Complex as an Enzyme Mimic; Scope and Limitation
作者:Makoto Ando、Jun Watanabe、Hiroyoshi Kuzuhara
DOI:10.1246/bcsj.63.88
日期:1990.1
A chelatecomplex (4) with high homogeneity was precipitated upon stirring a mixture of zinc(II) ion and a Schiff base produced from glycine and (R)- or (S)-15-formyl-14-hydroxy-2,8-dithia[9](2,5)pyridinophane, chiral pyridoxal-like pyridinophane. A four-coordinated zincchelatecomplex was newly proposed as the structure of 4. Aldol condensations between 4 and several aldehydes were attempted at pH