Transition-Metal-Free Conversion of Trifluoropropanamides into Cyanoformamides through C–CF<sub>3</sub> Bond Cleavage and Nitrogenation
作者:Fang Wang、Tao Zhang、Hai-Yong Tu、Xing-Guo Zhang
DOI:10.1021/acs.joc.7b00626
日期:2017.5.19
w A new transition-metal-free transformation of trifluoropropanamides into cyanoformamides through a sequence of C-CF3 bond cleavage and nitrogenation using tert-butyl nitrite as the nitrogen source,is described. The method features direct detrifluoromethylation, broad substrate scopes, and excellent selectivity control, representing a new shortcut for constructing the nitrile group involving C-CF3 sigma-bond cleavage.
The synthesis of cyanoformamides <i>via</i> a CsF-promoted decyanation/oxidation cascade of 2-dialkylamino-malononitriles
A mild and efficient method for the synthesis of cyanoformamides from N,N-disubstituted aminomalononitriles with CsF as the promoter has been developed. This method features a wide substrate scope and high reaction efficiency, and will facilitate corresponding cyanoformamide-based biological studies and synthetic methodology development.