名称:
Fluoride ion promoted reactions of .alpha.-halo silanes: synthesis of stilbenes, epoxides, cyclopropanes, benzazepines, and phthalidylisoquinolines
摘要:
Reaction of alpha-halo silanes 1 with CsF in DMF affords stilbenes 5. In the presence of added aldehydes, epoxides 6 are obtained, while with electron-deficient olefins the corresponding cyclopropanes 7 are formed. A similar reaction of 1a with iminium compounds 8 in HMPA leads to 2-phenyl-3-benzazepines 12, whereas 1b or 17 furnishes phthalidylisoquinolines 15.