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 regioselective dichlorocarbene addition 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.
通过向4-烷氧基-8,8-二甲基环庚烯中进行区域选择性二氯卡宾加成,获得了作为稳定化合物的3,4-同噻吩啶衍生物。通过用钠还原将氯原子取代为氢,得到重排的产物。通过使用重排的立体特异性,还制备了相应的旋光产物。