Stereospecific total syntheses of the natural antitumor agent, (.alpha.S, 5S)-.alpha.-amino-3-chloro-4,5-dihydro-5-isoxazoleacetic acid, and its unnatural C-5 epimer
Total synthesis of antitumor agent at-125, (αS,5S)-α-amino-3-chloro-4,5-dihydro-5-isoxazoleacetic acid
作者:Jack E. Baldwin、Jin K. Cha、Lawrence I. Kruse
DOI:10.1016/s0040-4020(01)96774-2
日期:1985.1
A short and efficient totalsynthesis of racemic AT-125 and its racemic threo isomer proceeds via an intramolecular Michael cyclization of a protected α,β-dehydroglutamic acid γ-hydroxamate. Separation of diastereomers and deprotection to racemic AT-125 followed by enzymatic resolution of the N-chloroacetamide with hog-kidney acylase provides the natural αS,5S isomer.