A palladium‐catalyzed C(sp2)−H difluoromethylation of aldehyde‐derived hydrazones using bromodifluoromethylated compounds to afford the corresponding functionalized difluoromethylketone hydrazones has been established. It is proposed that a radical/SET mechanism proceeding via a difluoroalkyl radical may be involved in the catalytic cycle. Applications of the methodology to the synthesis of α,α‐difluoro‐β‐ketoesters
Improved Efficient Conversion of Aldehydes to Nitriles <i>via</i> Their N, N-Dimethyl Hydrazones
作者:Ahmed Kamal、M. Arifuddin、N. VenugopalRao
DOI:10.1080/00397919808004513
日期:1998.12
Aldehyde N,N-dimethylhydrazones undergoes facile oxidative cleavage to nitriles on reaction with DIMS and K2CO3 in quantitative yields. Nitriles can also be easily obtained in high yields in a 'one-pot' process starting from the corresponding aldehydes.
SAID, SAMY BAYOMY;SKARZEWSKI, JACEK;MLOCHOWSKI, JACEK, SYNTHESIS,(1989) N, C. 223-224
作者:SAID, SAMY BAYOMY、SKARZEWSKI, JACEK、MLOCHOWSKI, JACEK