Esterification of carboxylic acids with boron trichloride
作者:Christopher A Dyke、Thomas A Bryson
DOI:10.1016/s0040-4039(01)00602-5
日期:2001.6
Treatment of carboxylicacids with borontrichloride followed by addition of alcohol provides the carboxylicester. This esterification, following BCl3 ether or ester OC cleavage reaction conditions, proceeds cleanly in good yields with most substrates. Cleavage of benzyl esters with borontrichloride then treating with methanol affords the methyl ester.
Studies toward the synthesis of roseophilin: lactam formation and Wittig/aldol methodology
作者:Christopher A Dyke、Thomas A Bryson
DOI:10.1016/j.tetlet.2004.06.013
日期:2004.7
In this communication, we introduce our retrosynthetic approach to the synthesis of roseophilin. An interesting, new Wittig/aldol methodology is described. Also discussed is macrocyclization of an azide acid to form an unsaturated lactam.