Stereochemical aspects of base-promoted reactions of o-alkenyl substituted arylhydrazonoyl chlorides with triphenylphosphine
作者:A. Alemagna、L. Garanti、E. Licandro、G. Zecchi
DOI:10.1016/s0040-4020(01)88460-x
日期:1984.1
The title arylhydrazonoyl chlorides treated with Et3N and PPh3 give arylazomethyl-enetriphenylphosphoranes and, in some cases, products of intramolecular cyclization (cyclopropacinnolines and benzodiazepines). A high concentration of base and a polar solvent accelerate all the observed reactions. In the presence of PPh3 a low reaction temperature and a non polar solvent favour the formation of the