Hydrazinolysis of Fischer-type oxacarbenes made efficient: a new and easy entry to alkyl and aryl hydrazinocarbene complexes
Abstract
Hydrazinolysis of the pentacarbonyl[alkyl- or aryl-(methoxy)carbene] complexes of W0 and Cr0 with both 1,1- and 1,2-disubstituted hydrazines affords the corresponding new hydrazinocarbenes 15–18, 21 and 22, and the presence of LiCl in the reaction medium greatly increases their yields.