A flexible route to immunosuppressive agent FR252921. Asymmetric total synthesis of its (13R,14R,19R)-isomer
作者:Shouyun Yu、Feng Liu、Dawei Ma
DOI:10.1016/j.tetlet.2006.09.169
日期:2006.12
A flexible route to the proposed structure of FR252921, a novel immunosuppressive agent, is developed. The key elements include the assembly of its two P-hydroxy acid residues via asymmetric aldol condensation of N-acylthiazolidinethinones with aldehydes, and its triene part via a CuI/N,N-dimethylglycine catalyzed Sonogashira coupling and subsequent isomerization. Using this strategy (13R,14R,19R)-FR252921 is elaborated. (c) 2006 Elsevier Ltd. All rights reserved.