Journal
SYNLETT
Volume 29, Issue 18, Pages 2396-2403Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0037-1609948
Keywords
spiro compounds; difunctionalization; visible-light photoredox catalysis; propiolamides; sulfonyl chlorides
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Funding
- Scientific Research Fund of Education Department of Hunan Provincial [16A087]
- Natural Science Foundation of Hunan Province [2018JJ3208]
- National Natural Science Foundation of China [21602056]
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An efficient and convenient strategy to synthesize diverse 3-sulfonylspiro[4,5]trienones has been developed. This ipso-carbosulfonylation of alkynes proceeds by visible-light catalysis under transition-metal-free conditions and represents a new sulfonylation and ipso-cyclization of alkynes. In this transformation, the O atom in the newly generated carbonyl is derived from H2O and it features a broad substrates scope, especially for alkyl propiolamides and aliphatic sulfonyl chlorides.
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