A CONVENIENT SYNTHESIS OF KETOXIMES FROM GRIGNARD REAGENTS AND NITRO COMPOUNDS ACTIVATED BY<i>N</i>,<i>N</i>-DIMETHYLCHLOROMETHYLENIMINIUM CHLORIDE
作者:Tamotsu Fujisawa、Yoshitsugu Kurita、Toshio Sato
DOI:10.1246/cl.1983.1537
日期:1983.10.5
Ketoximes were synthesized in high yields with a newcarbon–carbonbondformation by regioselective nucleophilic attack of Grignard reagents at the α-position of aci-nitroalkanes activated by N,N-dimethylchloromethyleniminium chloride in the presence of a catalytic amount of copper(I) iodide under mild conditions.
A highly efficient copper-catalyzed cyclization/cyanation cascade of unactivated olefins bearing oximes is described. A variety of cyano-containing isoxazolines have been obtained in high yields with cheap Cu(NO3)2·3H2O as the catalyst and TMSCN as the non-metallic cyanide source. The present method provides a mild, simple, and practical access to cyano-substituted isoxazolines and is amenable to gram