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, and the presence of LiCl in the reaction medium greatly increases their yields. Thus, reaction of (OC)5W:C(OMe)Me with R2NNH2 (R2N = piperidino, morpholino, trans-2,6-dimethylmorpholino, 4-methylpiperazino) in THF gave 6-34% of the corresponding R2NNHC(Me):W(CO)5 as Z rotamers. In presence of LiCl, morpholinohydrazine afforded 72% R2NNHC(Me):W(CO)5, double the yield obtained without added LiCl.
Hydrazinolysis of Fischer-type oxacarbenes made efficient: a new and easy entry to alkyl and aryl hydrazinocarbene complexes / E. Licandro, S. Maiorana, A. Papagni, D. Perdicchia, R. Manzotti. - In: CHEMICAL COMMUNICATIONS. - ISSN 1359-7345. - :10(1999), pp. 925-926.
Titolo: | Hydrazinolysis of Fischer-type oxacarbenes made efficient: a new and easy entry to alkyl and aryl hydrazinocarbene complexes |
Autori: | LICANDRO, EMANUELA (Primo) MAIORANA, STEFANO (Secondo) PERDICCHIA, DARIO (Penultimo) |
Settore Scientifico Disciplinare: | Settore CHIM/06 - Chimica Organica |
Data di pubblicazione: | 1999 |
Rivista: | |
Tipologia: | Article (author) |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1039/a900166b |
Appare nelle tipologie: | 01 - Articolo su periodico |