X=Y-ZH SYSTEMS AS POTENTIAL 1,3-DIPOLES. PART 21 ACTIVATION OF THE ZH PROTON IN IMINES.

Article abstract of DOI:10.1016/S0040-4020(01)80037-5

Imines, RCH=N-ZH, possessing a range of ZH groups (Z=CHCOPh, CHCOSR, CHCONHR, CHP(O)(OEt)2, 2-CH-pyridyl, 2-CH-thiazolyl, and 9-fluorenyl) undergo thermal 1,2-prototropy generating azomethine ylides stereospecifically.The intermediate azomethine ylides un