In HF/SbF5/CCln4 bicyclic cyclohexanones are dehydrogenated to enones and dienones, superelectrophilic trichloromethylcation CCl3+ reacting as a strong hydride acceptor. Dehydrogenation is also observed with steroidal enones.
Dependence of the Lewis Acid-induced Reaction of β-Stannyl Ketones upon Substitution Pattern. 1,2-Alkyl Migration<i>versus</i>Cyclopropanation
作者:Jun Fujiwara、Taro Yamamoto、Tadashi Sato
DOI:10.1246/cl.1992.1775
日期:1992.9
3-Stannylcyclohexanones fully substituted at 2 and 3 positions undergo a 1,2-alkyl migration and cyclopropanation. The balance of the reaction pattern depends upon the steric environment and migratory aptitude of the alkyl groups.