Novel palladium catalyzed dehydrogenation of α-hydrazinonitriles to hydrazonoyl cyanides using cyclopentene. Synthesis of 1H-pyrazole-4-carboxylate
摘要:
Palladium charcoal catalyzed dehydrogenation of alpha-hydrazinonitriles has been found to give hydrazonoyl cyanides in the presence of cyclopentene in high yields, which was applied to the synthesis of 1H-pyrazole-4-carboxylates. Copyright (C) 1996 Elsevier Science Ltd
Rhodium(III)-catalyzed synthesis of indoles from 1-alkylidene-2-arylhydrazines and alkynes via C–H and N–N bond cleavages
作者:Takanori Matsuda、Yuki Tomaru
DOI:10.1016/j.tetlet.2014.04.016
日期:2014.5
1-Alkylidene-2-arylhydrazines undergo annulative coupling with internal alkynes in the presence of a rhodium(III) catalyst and a copper(II) salt. The reaction proceeds through cleavage of the C–H and N–N bonds of hydrazines to afford 1,2,3-trisubstituted indole derivatives.