Cycloaddition reactions of 2,2,2-trifluorodiazoethane
作者:J. H. Atherton、R. Fields
DOI:10.1039/j39680001507
日期:——
2,2,2-Trifluorodiazoethane readily forms cyclopropanes when photolysed with suitable olefins. In the absence of light, a typical 1,3-dipolar addition gives Δ1-pyrazolines. This reaction, slow with ethylene, is retarded by alkyl substituents on the vinylic carbon, but accelerated slightly by halogens other than fluorine; a trifluoromethyl group has an accelerating effect of the same order of magnitude
Decarboxylative Trifluoromethylation of Aliphatic Carboxylic Acids
作者:Jacob A. Kautzky、Tao Wang、Ryan W. Evans、David W. C. MacMillan
DOI:10.1021/jacs.8b02650
日期:2018.5.30
conversion of carboxylicacids to trifluoromethyl groups via the combination of photoredox and copper catalysis. This transformation tolerates a wide range of functionality including heterocycles, olefins, alcohols, and strained ring systems. To demonstrate the broad potential of this new methodology for late-stage functionalization, we successfully converted a diverse array of carboxylic acid-bearing