Nickel- and Rhodium-Catalyzed Addition of Terminal Silylacetylenes to Propargyl Amines: Catalyst-Dependent Complementary Regioselectivity
摘要:
The cross-addition of terminal silylacetylenes to gamma-arylated propargyl amines occurs efficiently via C-H cleavage by using either a nickel or rhodium catalyst. Taking advantage of the catalyst-controlled switching of regioselectivity in the reaction, both the 2- and 3-alkynylallylamines are readily accessible from the same starting materials.
Silica nanospheres supported diazafluorene iron complex: an efficient and versatile nanocatalyst for the synthesis of propargylamines from terminal alkynes, dihalomethane and amines
作者:R. K. Sharma、Shivani Sharma、Garima Gaba
DOI:10.1039/c4ra10384j
日期:——
A novel silica nanosperes supported diazafluorene iron complex has been fabricated and found to be effective in three-component coupling reaction of terminal alkynes, dichloromethane and amines.
Effect of Varying the Anionic Component of a Copper(I) Catalyst on Homologation of Arylacetylenes to Allenes by the Mannich Reaction
作者:Vipan Kumar、Alex Chipeleme、Kelly Chibale
DOI:10.1002/ejoc.200700859
日期:2008.1
The effect of varying the anionic component of a copper(I) catalyst in the homologation of terminal arylacetylenes to allenes by the Mannichreaction was investigated. Varying amounts of allenes, Mannich bases and dimers were obtained depending on the nature of the anionic component of the copper catalyst. On the other hand, Eglinton–Glaser dimerizations were achieved in high yields with 0.5 equiv