Preparation of Conformationally Constrained α2-Antagonists: The Bicyclo[3.2.0]heptane Approach
作者:Bernard Bonnaud、Natacha Mariet、Bernard Vacher
DOI:10.1002/ejoc.200500541
日期:2006.1
possessing a benzo-fused bicyclo[3.2.0]heptane skeleton. The synthetic route used relied upon the intramolecular [2+2] cycloaddition of styrylketene precursors. The cycloaddition was remarkably efficient and delivered multigram quantities of the cycloadduct 2. Studies of the removal of the ketone group in 2 revealed a facile opening of the four-membered ring. Upon thermal elimination of TCI-13-endo (TCI