Intramolecular Carbolithiation Reactions in the Construction of Medium-Sized Rings. Synthesis of Pyrroloisoquinolines, Benzazepines, and Benzazocines
作者:Oihane García-Calvo、Estíbaliz Coya、Sergio Lage、Iain Coldham、Nuria Sotomayor、Esther Lete
DOI:10.1002/ejoc.201200994
日期:2013.3
Subsequent intramolecular carbolithiation of the 2-alkenyl-substituted ortho-lithiated N-benzylpyrroles proceeded efficiently when the alkene was substituted with an electron-withdrawing group. The procedure is applicable to the construction of six-, seven-, and eight-membered rings, thus, opening new routes to pyrroloisoquinolines, benzazepines, and benzazocines. Although the use of (–)-sparteine