Enantiospecific preparation of gem-dimethylcyclopropane fused cycloheptanes via valence tautomerization of 3,4-homotropilidene under thermodynamic and kinetic control
作者:Takashi Sugimura、Tohru Futagawa、Toshifumi Katagiri、Norio Nishiyama、Akira Tai
DOI:10.1016/0040-4039(96)01654-1
日期:1996.9
3,4-Homotropilidene derivatives were obtained as a stable compound by regioselectivedichlorocarbeneaddition to 4-alkoxy-8,8-dimethylcycloheptatrienes. Substitution of chlorine atomes to hydrogens in them by reduction with sodium affords rearranged products. By using stereospecificity of the rearrangement, the corresponding optically active products were also prepared.