Transition-Metal Complex Catalyzed Perfluoroalkylation. A Facile Synthesis of Fluorine-Containing Esters by Carbo-Carbonylation of Alkynes and Alkenes
作者:Hisao Urata、Hideki Yugari、Takamasa Fuchikami
DOI:10.1246/cl.1987.833
日期:1987.5.5
Palladium-catalyzed reaction of perfluoroalkyl iodides with terminalalkynes or alkenes in alcohols under carbon monoxide pressure in the presence of potassium carbonate directly gives β-perfluoroalkyl-substituted alkenoates or alkanoates, respectively.
New Methods of Free-Radical Perfluoroalkylation of Aromatics and Alkenes. Absolute Rate Constants and Partial Rate Factors for the Homolytic Aromatic Substitution by <i>n</i>-Perfluorobutyl Radical
n-C(4)F(9)I has been utilized as source of C(4)F(9)(*) radical through iodine abstraction by phenyl or methyl radical. The reaction with alkenes, carried out in the presence of catalytic amount of Cu(OAc)(2), leads to substitution by a mechanism substantially identical to the aromatic substitution and not to the usual chain addition of perfluoroalkyl group and iodine atom to the double bond. This has
multicomponent 1,2-perfluoroalkylation carbonylation of alkenes has been developed. This protocol allows the synthesis of β-perfluoroalkyl-substituted amides, esters, and related derivatives using olefins, carbon monoxide, commercially accessible perfluoroalkyl iodides, and a variety of nucleophiles including low nucleophilic amides and urea derivatives in a one-pot manner. As an example, readily available