期刊
ORGANIC LETTERS
卷 21, 期 1, 页码 275-278出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.8b03718
关键词
-
资金
- National Natural Science Foundation of China [21871053, 21532001]
- China postdoctoral science foundation [2018M630396]
A copper(II)-catalyzed three-component reaction of 2,3-allenoic acids, sulfur dioxide, and aryldiazonium tetrafluoroborates under mild conditions is developed, leading to 4-sulfonylated furan-2(5H)-ones in good yields. Not only sodium metabisulfite but also 1,4-diazabicyclo[2.2.2]octane-sulfur dioxide (DABCO center dot(SO2)(2)) is workable under the conditions. This transformation proceeds through a radical process initiated by the addition of arylsulfonyl radical to the C-central position of 2,3-allenoic acid. A broad substrate scope is demonstrated, and many sensitive functional groups are tolerated.
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