Enantioselective Approach to Securinega Alkaloids. Total Synthesis of Securinine and (−)-Norsecurinine
作者:David González-Gálvez、Elena García-García、Ramon Alibés、Pau Bayón、Pedro de March、Marta Figueredo、Josep Font
DOI:10.1021/jo901059n
日期:2009.8.21
The most representative securinega alkaloids have been synthesized through a new strategy involving the palladium-catalyzed enantioselective allylation of a cyclic imide, a vinylogous Mannich reaction, and a ring-closing metathesis process, as the key steps. The diastereoselectivity of the vinylogous Mannich reaction was in partial agreement with DFT theoretical calculations performed in a model system
An Effective Enantioselective Approach to the Securinega Alkaloids: Total Synthesis of (−)-Norsecurinine
作者:Ramón Alibés、Pau Bayón、Pedro de March、Marta Figueredo、Josep Font、Elena García-García、David González-Gálvez
DOI:10.1021/ol0522079
日期:2005.10.1
[reaction: see text] A highly versatile approach to the enantioselective synthesis of securinega alkaloids is presented. Crucial steps are a palladium-catalyzed enantioselective imide alkylation, a vinylogous Mannich reaction, and a ring-closing metathesis process. Through this strategy, the synthesis of (-)-norsecurinine has been accomplished in nine steps and 11% overall yield.