Transition metal-free tunable synthesis of 3-(trifluoromethylthio)and 3-trifluoromethylsulfinyl chromones via domino C-H functionalization and chromone annulation of enaminones
Tao Zhou Jing Zhou Yunyun Liu Jie-Ping Wan Fen-Er Chen
Transition metal-free tunable synthesis of 3-(trifluoromethylthio)and 3-trifluoromethylsulfinyl chromones via domino C-H functionalization and chromone annulation of enaminones
Tao Zhou 1Jing Zhou 2Yunyun Liu 1Jie-Ping Wan 1Fen-Er Chen2
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作者信息
1. College of Chemistry and Chemical Engineering,Jiangxi Normal University,Nanchang 330022,China
2. College of Chemistry and Chemical Engineering,Jiangxi Normal University,Nanchang 330022,China;Engineering Center of Catalysis and Synthesis for Chiral Molecules,Fudan University,Shanghai 200433,China
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Abstract
The new reactions between o-hydroxyphenyl enaminones and Langlois reagent(CF3SO2Na)for the tun-able synthesis of 3-(trifluoromethylthio)chromones and 3-trifluoromethylsulfinyl chromones are reported herein.Both type of reactions proceed under transition metal-free conditions.In addition,the conditions for the synthesis of 3-trifluoromethylsulfinyl chromones have also been found to be applicable for the synthesis of 3-alkyl/arylsulfinyl chromones.