| Literature DB >> 28950418 |
Wenyu Wang1, Anthony Clay2, Retheesh Krishnan3, Neil J Lajkiewicz1, Lauren E Brown1, Jayaraman Sivaguru2, John A Porco1.
Abstract
Selective excited-state intramolecular proton-transfer (ESIPT) photocycloaddition of 3-hydroxyflavones with trans, trans-1,4-diphenyl-1,3-butadiene is described. Using this methodology, total syntheses of the natural products (±)-foveoglin A and (±)-perviridisin B were accomplished. Enantioselective ESIPT photocycloaddition using TADDOLs as chiral hydrogen-bonding additives provided access to (+)-foveoglin A. Mechanistic studies have revealed the possibility for a photoinduced electron-transfer (PET) pathway.Entities:
Keywords: asymmetric synthesis; electron transfer; natural products; photochemistry; total synthesis
Mesh:
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Year: 2017 PMID: 28950418 PMCID: PMC5876029 DOI: 10.1002/anie.201707539
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN: 1433-7851 Impact factor: 15.336