Unexpected reactivity of 1-amine-2-methylenenorbornane hydrochlorides with m-CPBA
作者:Antonio García Martínez、Enrique Teso Vilar、Amelia García Fraile、Santiago de la Moya Cerero、Paloma Martínez Ruiz、Cristina Diaz Morillo、Beatriz Lora Maroto
DOI:10.1016/j.tetlet.2007.06.131
日期:2007.8
Two different 1-amino-3,3-dimethyl-2-methylenenorbornane hydrochlorides, a primary ammonium chloride and a tertiary one, react unexpectedly with m-CPBA (meta-chloroperbenzoic acid) according to two different paths. The primary ammonium chloride gives place to a diastereomeric mixture of the corresponding spiranic 1-nitronorbornane-based epoxides, whereas the tertiary derivative undergoes a skeleton rearrangement giving 10-chlorocamphor. The results are interpreted in terms of competitive reaction pathways controlled by the nitrogenated group located at the Cl norbornane position. (c) 2007 Elsevier Ltd. All rights reserved.