Enamine chemistry. Part XVII. Reaction of αβ-unsaturated acid chlorides with enamines. Further mechanistic investigations. Effect of triethylamine on the reaction path
作者:Peter W. Hickmott、Geoffrey J. Miles、George Sheppard、Raymond Urbani、Charles T. Yoxall
DOI:10.1039/p19730001514
日期:——
αα′-Annulation of enamines of cyclic ketones occurs on treatment with αβ-unsaturatedacidchlorides in boiling benzene, to give bridged bicyclic ketones. Further evidence supports the contention that this occurs by initial N-acylation of the enamine followed by a [3,3]sigmatropic rearrangement. In the presence of triethylamine the course of the reaction is changed. C-Acylation of the enamine occurs, leading