Catalytic Hydrosilylation of Hydrofluoroolefins (HFOs): Synthesis of New Fluorinated Silanes and Diversity of their Synthetic Character
作者:Natalia V. Pavlenko、Sheng Peng、Viacheslav Petrov、Andrew Jackson、Xuehui Sun、Lee Sprague、Yurii L. Yagupolskii
DOI:10.1002/ejoc.202000853
日期:2020.9.7
We present here the hydrosilylation of commercially available hydrofloroolefins catalyzed by Pt, Pd, and Rh complexes as an efficient route toward a family of new polyfluorinated silanes as well as their use as versatile buildingblocks for subsequent functionalization based on C–F and C‐Si bond activation.
Palladium-Catalyzed Decarboxylative Trifluoroethylation of Aryl Alkynyl Carboxylic Acids
作者:Jinil Hwang、Kyungho Park、Juseok Choe、Hongkeun Min、Kwang Ho Song、Sunwoo Lee
DOI:10.1021/jo5003032
日期:2014.4.4
A trifluoroethylation of alkynes through a palladium-catalyzeddecarboxylativecoupling reaction was developed. When alkynyl carboxylic acids and ICH2CF3 were allowed to react with [Pd(η3-allyl)Cl]2/XantPhos and Cs2CO3 in N,N-dimethylformamide (DMF) at 80 °C for 1 h, the desired products were formed in good yields. This catalytic system showed high functional group tolerance.
Trifluoromethylation of Propargylic Halides and Trifluoroacetates Using (Ph<sub>3</sub>P)<sub>3</sub>Cu(CF<sub>3</sub>) Reagent
作者:Tony S. N. Zhao、Kálmán J. Szabó
DOI:10.1021/ol3017287
日期:2012.8.3
A copper-mediatedtrifluoromethylation of propargylic halides and trifluoroacetates was performed with high allenyl or propargyl selectivity. The reaction proceeds smoothly with aliphatic and aromatic substituents bearing either electron-withdrawing or -supplying groups. Preliminary mechanistic results indicate an ionic mechanism involving nucleophilic transfer of the CF3 group from the Cu complex
Nickel‐Catalyzed Allylmethylation of Alkynes with Allylic Alcohols and AlMe
<sub>3</sub>
: Facile Access to Skipped Dienes and Trienes
作者:Wanfang Li、Shun Yu、Jincan Li、Yu Zhao
DOI:10.1002/anie.202006322
日期:2020.8.17
herein an unprecedented allylative dicarbofunctionalization of alkynes with allylic alcohols. This simple catalytic procedure utilizes commercially available Ni(COD)2, triphenylphosphine, and inexpensive reagents, and delivers valuable skipped dienes and trienes with an all‐carbontetrasubstitutedalkeneunit in a highly stereoselective fashion. Preliminary mechanistic studies support the reaction pathway
Reactions of propargylic halides with trifluoromethyltrimethylsilane in the presence of a catalytic amount of copper(I) thiophene-2-carboxylate (CuTC) have been found to give the corresponding trifluoromethylated products in good to high yields with a high selectivity.