Copper- and Iron-Catalyzed Decarboxylative Tri- and Difluoromethylation of α,β-Unsaturated Carboxylic Acids with CF<sub>3</sub>SO<sub>2</sub>Na and (CF<sub>2</sub>HSO<sub>2</sub>)<sub>2</sub>Zn via a Radical Process
作者:Zejiang Li、Zili Cui、Zhong-Quan Liu
DOI:10.1021/ol3034059
日期:2013.1.18
A copper-catalyzed decarboxylative trifluoromethylation of various α,β-unsaturated carboxylic acids by using a stable and inexpensive solid, sodium trifluoromethanesulfinate (CF3SO2Na, Langlois reagent), was developed. In addition, an iron-catalyzed difluoromethylation of aryl-substituted acrylic acids by using zinc difluoromethanesulfinate (DFMS, (CF2HSO2)2Zn, Baran reagent) via a similar radical
通过使用稳定且廉价的固体三氟甲烷亚磺酸钠(CF 3 SO 2 Na,Langlois试剂),开发了铜催化的各种α,β-不饱和羧酸的脱羧三氟甲基化反应。另外,还通过类似的自由基方法,通过使用二氟甲亚磺酸锌(DFMS,(CF 2 HSO 2)2 Zn,Baran试剂),实现了铁催化的芳基取代的丙烯酸的二氟甲基化。