CF3 radicals from triflic anhydride and collidine: Their trapping by a trimethylsilylenolether
摘要:
The interaction of triflic anhydride with s-collidine in the presence of the (trimethylsilyl)enolether of acetophenone led to duplication products the structure of which could only be explained by the formation of CF3 radicals. (C) 2010 Elsevier B.V. All rights reserved.
The interaction of triflic anhydride with s-collidine in the presence of the (trimethylsilyl)enolether of acetophenone led to duplication products the structure of which could only be explained by the formation of CF3 radicals. (C) 2010 Elsevier B.V. All rights reserved.
Zn-mediated rhodium-catalyzed α-trifluoromethylation of ketones via silyl enol ethers
The treatment of silylenolethers of ketones with CF3–I and Et2Zn in the presence of RhCl(PPh3)3 in DME gave α-trifluoromethyl ketones in good yields. The reaction can be widely applicable to silylenolethers derived from aliphatic or aromatic ketones. In the absence of the rhodium catalyst, the reaction was very slow and the yields were quite poor.