期刊
ADVANCED SYNTHESIS & CATALYSIS
卷 364, 期 23, 页码 4036-4042出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.202200934
关键词
enamides; electrochemically induced; trifluoromethylation; arylsulfonylation; free radicals
资金
- National Natural Science Foundation of China [21562003, 21762002]
- Natural Science Foundation of the Jiangsu Higher Education Institutions [20KJB150026]
In this study, an electrochemically induced method for regio- and stereoselective (E)-beta-C(sp(2))-H trifluoromethylation of enamides was disclosed. The method features catalyst-free, simple setup, and broad substrate scopes, allowing for the synthesis of products with exclusive E-selective control under mild conditions.
Herein, we disclosed an electrochemically induced method for the regio- and stereoselective (E)-beta-C(sp(2))-H trifluoromethylation of enamides by employing readily available and inexpensive Langlois' reagent (CF3SO2Na). Preliminary mechanistic studies indicate the involvement of free radicals in the process. The exogenous oxidant-free reaction proceeds in an undivided electrochemical cell under mild conditions and allows for the accomplishment of the trifluoromethylation products with exclusive E-selective control. The methodology is featured by catalyst-free, simple setup, and broad substrate scopes of enamides with good functional group tolerance. Using ArSO2Na as the coupling partner, the corresponding (E)-beta-C(sp(2))-H arylsulfonylated enamides products are obtained under standard reaction conditions.
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