Stereoselective synthesis of the C7C21 segment of epothilone A via asymmetric alkoxyallyl- and crotylboration
摘要:
The synthesis of the C-7-C-21 fragment of epothilone A involving asymmetric alkoxyallyl- and crotylboration using alpha-pinene-derived reagents is described. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of the Spirofungin B Core by a Reductive Cyclization Strategy
作者:Thomas E. La Cruz、Scott D. Rychnovsky
DOI:10.1021/ol050589c
日期:2005.4.1
decyanation approach to the synthesis of the core of spirofungin B has been developed. Spirofungin B has only one anomeric stabilization in the spiroacetal and was isolated along with its spiroacetal epimer, spirofungin A. The cyclization precursor was constructed from readily available starting materials. The reductive cyclization reaction was both efficient and stereoselective. The reductive cyclization