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Volumn 3, Issue 16, 2005, Pages 3066-3072

Synthesis and "double-faced" antioxidant activity of polyhydroxylated 4-thiaflavans

Author keywords

[No Author keywords available]

Indexed keywords

ANTIOXIDANTS; FREE RADICALS; HYDROXYLATION; KETONES; PHENOLS; REACTION KINETICS; STYRENE;

EID: 24144473898     PISSN: 14770520     EISSN: None     Source Type: Journal    
DOI: 10.1039/b507496g     Document Type: Article
Times cited : (54)

References (93)
  • 1
    • 0003536299 scopus 로고    scopus 로고
    • Oxford Science Publications, Oxford University Press, London, 3rd edn., and references cited therein
    • B. Halliwell and J. M. C. Gutteridge, Free Radicals in Biology and Medicine, Oxford Science Publications, Oxford University Press, London, 3rd edn., 1998 and references cited therein.
    • (1998) Free Radicals in Biology and Medicine
    • Halliwell, B.1    Gutteridge, J.M.C.2
  • 12
    • 0004109804 scopus 로고    scopus 로고
    • Harwood Academic Publishers, Amsterdam, and references cited therein
    • (b) B. A. Bohm, Introduction to Flavonoids, Harwood Academic Publishers, Amsterdam, 1998 and references cited therein
    • (1998) Introduction to Flavonoids
    • Bohm, B.A.1
  • 44
    • 33645628354 scopus 로고    scopus 로고
    • note
    • Phenol 4e is commercially available, silylated phenols 4a-d and 4f were prepared from the corresponding di- or trihydoxyderivative using t-butyldimethylsilyl chloride and imidazole in dry DMF following standard synthetic procedures.
  • 48
    • 33645613646 scopus 로고    scopus 로고
    • note
    • Styrene 7a is commercially available, styrenes 7b and 7c were prepared from 4-hydroxy- and 3,4-dihydroxy-benzaldehyde by silylation and Wittig olefination.
  • 52
    • 33645623032 scopus 로고    scopus 로고
    • note
    • 2O using DCM as solvent, or with CsF in methanol.
  • 59
    • 33645621753 scopus 로고    scopus 로고
    • note
    • To avoid the base mediated ring opening of sulfones during desilylation with TBAF, oxidation can also be run as final step of the synthetic sequence.
  • 86
    • 33645624463 scopus 로고    scopus 로고
    • note
    • As a matter of fact, attempts to identify the oxidation products of the reaction of thiaflavan 9i with DPPH by HPLC ESI-MS were unsuccessful.
  • 87
    • 33645613396 scopus 로고    scopus 로고
    • note
    • -1. A complete list of BDE values for compounds 9-12 is available as supplementary information
  • 88
    • 33645614804 scopus 로고    scopus 로고
    • note
    • 31,32,33,38 and results reported in this paper we assumed the S-alkyl contribution as equivalent to that of an O-alkyl group.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.