Generation of 3-sulfonated 2 H-pyrrol-2-ones through a three-component reaction of allenoic amides,sulfur dioxide,and aryldiazonium tetrafluoroborates under metal-free conditions is achieved.This transformation procee...Generation of 3-sulfonated 2 H-pyrrol-2-ones through a three-component reaction of allenoic amides,sulfur dioxide,and aryldiazonium tetrafluoroborates under metal-free conditions is achieved.This transformation proceeds under mild conditions without the addition of catalysts or additives,giving rise to 3-sulfonated 2 H-pyrrol-2-ones in moderate to good yields.Good functional group compatibility is observed.A plausible mechanism is proposed,which is initiated by aryl radicals formed in situ from aryldiazonium tetrafluoroborates and DABCO·(SO2)2.Additionally,excellent chemoselectivity and regioselectivity are presented in this transformation.展开更多
基金the National Natural Science Foundation of China(Nos.21871053 and 21532001)the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(No.2019R01005)。
文摘Generation of 3-sulfonated 2 H-pyrrol-2-ones through a three-component reaction of allenoic amides,sulfur dioxide,and aryldiazonium tetrafluoroborates under metal-free conditions is achieved.This transformation proceeds under mild conditions without the addition of catalysts or additives,giving rise to 3-sulfonated 2 H-pyrrol-2-ones in moderate to good yields.Good functional group compatibility is observed.A plausible mechanism is proposed,which is initiated by aryl radicals formed in situ from aryldiazonium tetrafluoroborates and DABCO·(SO2)2.Additionally,excellent chemoselectivity and regioselectivity are presented in this transformation.
