Copper-mediated trifluoromethylation of propiolic acids: facile synthesis of α-trifluoromethyl ketones
作者:Zhengbiao He、Rui Zhang、Mingyou Hu、Lingchun Li、Chuanfa Ni、Jinbo Hu
DOI:10.1039/c3sc51613j
日期:——
Copper-mediated decarboxylative trifluoromethylation provides a new protocol for the efficient preparation of α-trifluoromethyl ketones from propiolic acids. It was found that water is involved as a reactant in the reaction, which is significantly different from the previously reported decarboxylative fluoroalkylation reactions.
The rhodium-catalyzedcycloisomerization of ester-tethered 1,6-diynes bearing a cyclopropanol moiety produced tetralone/exocyclic diene hybrid molecules with thermodynamically unfavorable alkene geometry. The results of control experiments and density functional theory calculations suggest that the ester tether plays an important role in the efficiency of E/Z isomerization processes.