Hydroarylation of aryl-substituted alkynes with simple and substituted arenes was conducted in the presence of trifluoroacetic acid in dichloromethane without any metal catalysts or additives. Electron-rich arenes coupled with aryl-substituted alkynes to give 1,1-diarylalkenes in good to high yields.
Stereo- and Regioselective Addition of Arene to Alkyne Using Abnormal NHC Based Palladium Catalysts: Elucidating the Role of Trifluoroacetic Acid in Fujiwara Process
作者:Pradip Kumar Hota、Anex Jose、Swadhin K. Mandal
DOI:10.1021/acs.organomet.7b00649
日期:2017.11.27
(aNHC) based Pd catalysts have been used for the efficient hydroarylation of aromatic C–H bonds leading to new C–C bond formation through regio- and stereoselective addition to alkynes. The addition reaction has been realized by a catalytic amount of Pd (II) compound (0.5 mol %) in trifluoroacetic acid (TFA) under ambient conditions. Various arenes undergo transhydroarylation selectively across the triple
An Efficient Bismuth(III) Chloride-Catalyzed Synthesis of 1,1-Diarylalkenesvia Friedel–Crafts Reaction of Acyl Chloride or Vinyl Chloride with Arenes
作者:Hongbin Sun、Ruimao Hua、Songjie Chen、Yingwu Yin
DOI:10.1002/adsc.200606157
日期:2006.9
In the presence of catalytic amount of bismuth(III) chloride, the reactions of acyl chlorides or vinyl chlorides with arenes afforded 1,1-diarylalkenes in 25–82 % isolated yield. In the case of the reaction of acyl chlorides with arenes, the procedure includes an initial Friedel–Crafts acylation, subsequent formation of vinyl chlorides and final Friedel–Crafts-type vinylation of another arene molecule
Palladium incorporated MIL-101(Cr): a heterogeneous and reusable catalyst for the C–H functionalization of unactivated arenes
作者:Fillip Kumar Sarkar、Sushmita Gajurel、Lenida Kyndiah、Rajib Sarkar、Rupesh S. Devan、Amarta Kumar Pal
DOI:10.1039/d2nj03889g
日期:——
Herein, a palladium containing metal–organic framework was designed for use in the C–H functionalization of unactivated arenes. The catalyst was prepared via post-synthetic modification of amino-functionalized MIL-101(Cr) and was well characterized using spectroscopic techniques. The catalyst is highly active in the aforementioned reaction, resulting in a 70–92% yield of the desired products at room