A cascade radical cyclization starting from an amidyl radical has been used for the construction of (+/-)-aspidospermidine. This approach has also been developed for the preparation of a tricycle whose framework is contained in the stemona alkaloids.
Amidyls in radical cascades. The total synthesis of (±)-aspidospermidine and (±)-13-deoxyserratine
作者:Anne-Claude Callier-Dublanchet、Jérôme Cassayre、Fabien Gagosz、Béatrice Quiclet-Sire、Lisa A. Sharp、Samir Z. Zard
DOI:10.1016/j.tet.2008.02.107
日期:2008.5
Concise routes to aspidospermidine and 13-deoxyserratine are described, hinging on a cascade starting from an amidyl radical and allowing the construction of the key indolizidine cores in one step. (C) 2008 Elsevier Ltd. All rights reserved.