Visible-light promoted cascade cyanoalkylsulfonylation/-cyclization of -arylpropiolamides toward sulfonated spiro[4,5]trienones SO insertion

A novel visible-light induced sulfonylation/ ipso -cyclization of N -arylpropiolamides with cyclobutanone oxime esters and Na 2 S 2 O 5 was reported. This protocol proceeded via a radical process. The wide substrate scope, sustainable metal-free conditions and readily accessible reagents make this p...

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Published in:Organic & biomolecular chemistry 2023-06, Vol.21 (23), p.4823-4832
Main Authors: Shan, Xiwen, Gao, Yu, Lu, Yaru, Huang, Rong, Sun, Tengteng, Lu, Kui, Zhao, Xia
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Summary:A novel visible-light induced sulfonylation/ ipso -cyclization of N -arylpropiolamides with cyclobutanone oxime esters and Na 2 S 2 O 5 was reported. This protocol proceeded via a radical process. The wide substrate scope, sustainable metal-free conditions and readily accessible reagents make this protocol an efficient and green strategy for the synthesis of cyanoalkyl sulfonated spiro[4,5]trienones. A visible-light promoted cascade cyanoalkylsulfonylation/ ipso -cyclization of N -arylpropiolamides toward sulfonated spiro[4,5]trienones via SO 2 insertion was developed.
ISSN:1477-0520
1477-0539
DOI:10.1039/d3ob00557g