Cu(BTC)-MOF catalyzed multicomponent reaction to construct 1,4-disubstituted-1,2,3-triazoles
摘要:
Cu(BTC)-MOF catalyzed one-pot, three-component reaction of terminal alkynes, halides and sodium azide to form 1,4-disubstituted-1,2,3-triazoles was investigated. It was conducted in methanol under room temperature with good to excellent product yields. The Cu(BTC)-MOF catalyst could be easily recovered by filtration and be reused at least three recycles with no significant decrease in the yield. The method was demonstrated to be a truly green process with sustainability and economics. (C) 2018 Elsevier Ltd. All rights reserved.
A palladium-catalyzed alkenylation of 1,2,3-triazoles with terminal conjugatedalkenes by direct C-H functionalization has been developed in the presence of Cu(OAc) 2 and dioxygen. A variety of terminal alkenes such as acrylates and styrenes can perform the direct oxidative coupling reactions with 1,2,3-triazoles to afford the corresponding alkenylated products in 30-90 % yield.
A few rhodiumcomplexes of N-heterocyclic carbenes were prepared through carbene transfer reactions and their structures were characterized by X-ray diffraction analysis. The rhodiumcomplexes of NHCs are found to be efficient catalysts for vinylation of various triazoles via C–H activation. A number of double vinylated triazoles can be obtained in good yields.
Rhodium-catalyzed triazole-directed C–H bond functionalization of arenes with diazo compounds
作者:Huanhong Wang、Xiaofei Yi、Yanli Cui、Wanzhi Chen
DOI:10.1039/c8ob01673a
日期:——
science. In this paper, rhodium(III)-catalyzed triazole-directed alkylation reactions of arenes using diazo compounds as the alkylating agents are described. A number of polysubstituted arenes were provided from easily available materials in good yields under mild conditions. The reactions proceed via triazole-directed ortho C–H bond activation and subsequent carbeneinsertion originating from diazo
Rhodium-catalyzedannulation reactions between triazoles and internal alkynes, leading to various mesoionic isoquinoliums, are described. The reaction involves sequential triazole-directed C–H activation and C–C, C–N, and C–O bond formation processes in a one-pot manner. The starting materials and catalysts are easily available. The reaction offers a facile and practical approach to mesoionic isoquinolium