Application of the N-hydroxymethyl group to the stereoselective synthesis of (3S,4S)-3-aminodeoxystatine derivatives
作者:Dongwon Yoo、Seah Kwon、Young Gyu Kim
DOI:10.1016/j.tetasy.2005.10.018
日期:2005.11
Stereo selective synthesis of two 3-aminodeoxystatine derivatives was achieved. Chiral gamma-amino-alpha,beta-unsaturated esters containing an N-aminomethyl group undergo the stereoselective conjugate addition with an internal carbamate or amide nitrogen nucleophile. The diastereoselectivity was about 10:1 by H-1 NMR. Thus, the 3-aminodeoxystatine derivatives were prepared from commercially available N-Boc-L-leucine in nine steps in overall yields of 26% and 20% for the benzyl carbamate and the acetamide derivatives, respectively. (c) 2005 Elsevier Ltd. All rights reserved.