Enantioselective synthesis of (−)-barrenazines A and B
作者:M. Montserrat Martínez、Luis A. Sarandeses、José Pérez Sestelo
DOI:10.1016/j.tetlet.2007.09.145
日期:2007.11
A short enantioselective synthesis of barrenazines A and B is described. Barrenazines A and B are prepared following a common synthetic route in nine steps (19% overall yield) and eight steps (21% overall yield), respectively, from readily available 4-methoxy-3-(triisopropylsilyl)pyridine. The synthesis relies on a highly diastereoselective nucleophilic addition of a Grignard reagent to a chiral acylpyridinium