Mild and metal-free trifluoromethylation and pentafluoroethylation of gem-difluoroalkenes with TMSCF3 and TMSCF2CF3
摘要:
A direct and efficient approach for the trifluoromethylation and pentafluoroethylation of 1,1-diary1-2,2-difluoroethenes with TMSCF3 and TMSCF2CF3 in the presence of TBAF was developed. The reactions proceeded smoothly under mild reaction conditions to give the corresponding monotrifluoromethylated, bistrifluoromethylated, monopentafluoroethylated and bispentafluoroethylated products in fair to good yields, respectively, without the addition of metal catalyst. (c) 2015 Elsevier Ltd. All rights reserved.
Synthesis of <i>N</i>-(α-Fluorovinyl)azoles by the Reaction of Difluoroalkenes with Azoles
作者:Yang Xiong、Xuxue Zhang、Tao Huang、Song Cao
DOI:10.1021/jo5005845
日期:2014.7.18
A mild and versatile method for the construction of C-N bonds by the reaction of (2,2-difluorovinyl)arenes with various N-H-containing heterocycles in the presence of K3PO4 has been developed. The reaction proceeded efficiently at room temperature (25 degrees C) affording the (E)-N-alpha-fluorovinyl derivatives of azoles 3 in good to excellent yields with relatively high stereoselectivity.