Sato S, Akiya T, Suzuki T, Onodera JI. Environmentally friendly C-glycosylation of phloroacetophenone with unprotected d-glucose using scandium(III) trifluoromethanesulfonate in aqueous media: key compounds for the syntheses of mono- and di-C-glucosylflavonoids.
Carbohydr Res 2004;
339:2611-4. [PMID:
15476723 DOI:
10.1016/j.carres.2004.07.023]
[Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2004] [Accepted: 07/20/2004] [Indexed: 10/26/2022]
Abstract
The direct C-glycosylation of phloroacetophenone with an unprotected d-glucose in aqueous media using scandium(III) trifluoromethanesulfonate (Sc(OTf)3) as the catalyst, gave mono- and bis-C-beta-glycosylic compounds in highest total yield of 81%. The second and third use of the recovered Sc(OTf)3 afforded them in total yields of 56% and 53%, respectively.
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