2,2′-Diamino-6,6′-dimethylbiphenyl (L1) was found to be a good ligand in the CuI-catalyzed Sonogashira coupling reaction of various aryl iodides and bromides with terminal alkynes. Under suitable conditions, all reactions gave the desired coupling products in moderate to excellent yields.
Base-Free Palladium-Catalyzed Sonogashira Coupling Using Organogold Complexes
作者:Sreekumar Pankajakshan、Teck-Peng Loh
DOI:10.1002/asia.201100263
日期:2011.9.5
Turn to gold: An effective protocol for base‐free Sonogashiracoupling reactions usingorganogoldcomplexes as nucleophilic partners has been developed. The palladium‐catalyzed methodology offers a general synthesis of aryl–alkynes under operationally simple conditions in good to excellent yields.
作者:Yury N. Kotovshchikov、Artem A. Binyakovsky、Gennadij V. Latyshev、Nikolay V. Lukashev、Irina P. Beletskaya
DOI:10.1039/d2ob01267g
日期:——
assembling internal alkynes from tertiary propargyl alcohols and (het)arylhalides has been developed. The proposed tandem approach includes the base-promoted retro-Favorskii fragmentation followed by Cu-catalyzed C(sp)–C(sp2) cross-coupling. The use of inexpensive reagents (e.g. a catalyst, additives, a base, and a solvent) and good functional group tolerance make the procedure practical and cost-effective