Facile One-Pot Synthesis of 3,5-Disubstituted 1H-Pyrazoles from Propargylic Alcohols via Propargyl Hydrazides
作者:Chada Raji Reddy、Jonnalagadda Vijaykumar、René Grée
DOI:10.1055/s-0032-1316856
日期:——
A new and efficient metal-free, two-component, one-pot approach to a variety of 3,5-disubstituted 1H-pyrazoles has been developed from propargylic alcohols. This transformation proceeds via an acid-catalyzed propargylation of N,N-diprotected hydrazines followed by base-mediated 5-endo-dig cyclization leading to 3,5-disubstituted 1H-pyrazoles in good overall yields.