Annulative ring expansions. Direct conversion of .omega.-alkynyl acetals to polycyclic unsaturated ketones
作者:Joseph Sisko、Aaron Balog、Dennis P. Curran
DOI:10.1021/jo00042a007
日期:1992.7
Geminal acylation of omega-acetylenic acetals and bis(silyloxy)cycloalkenes under Lewis acid conditions preceded cationic cyclization of the alkyne onto the ketone to produce polycyclic unsaturated ketones.