Diastereoselective synthesis of (+)-nephrosterinic acid and (+)-protolichesterinic acid
作者:Rodney A. Fernandes、Mahesh B. Halle、Asim K. Chowdhury、Arun B. Ingle
DOI:10.1016/j.tetasy.2011.12.012
日期:2012.1
A diastereoselective synthesis of (+)-nephrosterinic acid and (+)-protolichesterinic acid, common members of the paraconic acids is described. The synthesis is based on a diastereoselective orthoester Johnson-Claisen rearrangement of a (Z)-allyl alcohol with a vicinal dioxolane moiety as key steps. The synthesis is completed in 10 steps and with overall yields of 15.9% for (+)-nephrosterinic acid and 16.4% for (+)-protolichesterinic acid. (C) 2012 Elsevier Ltd. All rights reserved.