Intramolecular cyclisations of nitrile imines bearing a thioether function
作者:Luca Bruché、Luisa Garanti、Gaetano Zecchi
DOI:10.1039/p19810002245
日期:——
N-Aryl nitrile imines bearing a thioether function in the ortho-position were generated in situ on treating the corresponding hydrazonyl chlorides with triethylamine in boiling benzene. In all cases, the major products were 4,1,2-benzothiadiazines arising from intramolecular participation of the sulphur and subsequent evolution of transient cyclic ylides. Minor products due to an intramolecular 1,3-dipolar