An oxidative copper-mediated double trifluoromethylselenolation of terminal 2-alkynylanilines using [(bpy)CuSeCF3]2 is reported, providing a moderately efficient and convenient approach to 2,3-bis(trifluoromethylseleno)indoles. Mechanistic studies show that a cascade sequence of oxidation, trifluoromethylselenolation, 5-endo-dig cyclization, and elimination is involved in this transformation.
Synthesis of trifluoromethylthiolated and trifluoromethylselenolated pyrones
作者:Yunxiao Zhang、Ding-Yah Yang、Zhiqiang Weng
DOI:10.1016/j.tet.2017.05.051
日期:2017.7
Trifluoromethylthiolation and trifluoromethylselenolation of 3- or 4-iodo(bromo)-2-pyrones with (bpy)CuSCF3 and [(bpy)CuSeCF3]2 provide a convenient method for the synthesis of trifluoromethylthio(seleno)lated 4-alkoxy-, aryloxy-, and benzyloxy-2-pyrones in high yields.
Copper-mediated synthesis of α-trifluoromethylselenolated esters
作者:Taotao Chen、Yi You、Zhiqiang Weng
DOI:10.1016/j.jfluchem.2018.10.002
日期:2018.12
A copper-mediated synthesis of α-trifluoromethylselenolated esters was developed. Trifluoromethylselenolation of the aromatic and aliphatic α-diazo esters with [(bpy)Cu(SeCF3)]2 afforded α-trifluoromethylselenolated esters in good to excellent yields. Various important functional groups were tolerated in the ortho, meta, and para positions of the phenyl rings.
A novel route to the synthesis of alpha-trifluoromethylthio- and seleno-alpha,beta-unsaturated carbonyl compounds via a copper-mediated trifluoromethylthiolation/trifluoromethylselenolation of alpha-halo-alpha,beta-unsaturated carbonyl substrates is reported. (C) 2013 Elsevier Ltd. All rights reserved.