Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 15, Issue 5, Pages 568-572Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201901735
Keywords
Photocatalysis; Redox-active ester; N-(acyloxy)phthalimide; Radicals; Chroman-4-one
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Funding
- CSIR
- IISER Kolkata
- IIT Jodhpur
- SERB [ECR/2017/001408]
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An organophotoredox catalyzed efficient and robust approach for the synthesis of highly important 3-alkyl substituted chroman-4-one scaffold is developed using visible light induced radical cascade cyclization strategy. The reaction is initiated through the generation of alkyl radicals from N-(acyloxy)phthalimides under photoredox conditions, which subsequently undergo intermolecular cascade radical cyclization on 2-(allyloxy)arylaldehydes to afford chroman-4-one scaffolds. The presented strategy is attractive with regard to mild reaction conditions, operational simplicity, high functional group tolerance and broad substrate scope.
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