Recyclable gold(I)-catalyzed hydrohydrazidation of terminal alkynes towards keto-N-acylhydrazones
作者:Siqi Liu、Jianying Li、Wenli Hu、Bin Huang、Mingzhong Cai
DOI:10.1016/j.jorganchem.2022.122411
日期:2022.9
heterogeneous gold(I)-catalyzed hydrohydrazidation of terminal alkynes with diverse hydrazides has been developed in chlorobenzene at 60 °C by using an MCM-41-immobilized diphenylphosphine gold(I) complex [Ph2P-MCM-41-AuNTf2] as the catalyst, providing a novel and practical method for the synthesis of a wide variety of substituted keto-N-acylhydrazones in good to excellent yields. This heterogenizedgold(I) catalyst
Gold-Catalyzed Hydrohydrazidation of Terminal Alkynes
作者:Dmitry P. Zimin、Dmitry V. Dar’in、Valentin A. Rassadin、Vadim Yu. Kukushkin
DOI:10.1021/acs.orglett.8b02019
日期:2018.8.17
Facile gold-catalyzed hydrohydrazidation of alkynes with various hydrazides (RCONHNH2)-C-2 (R = Alk or Ar; including those with an additional nudeophilic moiety) in the presence of Ph3PAuNTf2 (6 mol %) leading to a wide range of substituted keto-N-acylhydrazones (18 examples) in excellent to good yields (99-66%) is reported. This novel metal-catalyzed coupling proceeds under mild conditions (chlorobenzene, 60 degrees C), exhibits high functional group tolerance, and is insensitive to the electronic and steric effects of the substituents in the reactants.