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Volumn , Issue 19, 2005, Pages 2973-2977

Trifluoromethanesulfonic acid efficiently catalyzed the intramolecular glycosidation of 1-C-alkyl-D-hexopyranoses to form the anhydroketopyranoses having 6,8-dioxabicyclo[3.2.1]octane structures

Author keywords

1 C alkyl hexopyranose; Anhydro form; Anhydroketopyranose; Intramolecular glycosidation; Trifluoromethanesulfonic acid

Indexed keywords

ALKANE DERIVATIVE; PYRAN DERIVATIVE; TRIFLUOROMETHANESULFONIC ACID;

EID: 28844459422     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2005-921912     Document Type: Article
Times cited : (17)

References (26)
  • 18
    • 0030022998 scopus 로고    scopus 로고
    • (c) As the 1-C-alkyl-hexofuranose derivative, the glycosidation using 2,3:5,6-di-O-isopropylidene-1-C-methyl-D-mannofuranosyl acetate was reported. See: Dondoni, A.; Marra, A.; Rojo, I.; Scherrmann, M.-C. Tetrahedron 1996, 52, 3057.
    • (1996) Tetrahedron , vol.52 , pp. 3057
    • Dondoni, A.1    Marra, A.2    Rojo, I.3    Scherrmann, M.-C.4
  • 20
    • 0024787126 scopus 로고
    • 2MgCl afforded 6-O-acetyl-2,3,4-tri-O-benzyl-1-C-phenyl-α- D-glucopyranose (11d) and 6-O-acetyl-1-C-benzyl-2,3,4-tri-O-benzyl-α-D- glucopyranose (11e) in 89% and 82% yields, respectively, with almost no production of the deacetylated compounds. It seemed that these bulky organometallic reagents were apt to produce the nucleophilic attack on the conformationally fixed carbonyl group at C-1 of 10 rather than on the acetyl group at C-6. The treatment of 11b-e using NaOMe in MeOH quantitatively afforded 1b-e. 2,3,4-Tri-O-benzyl-1-C-methyl-α-D-mannopyranose (6a) was similarly prepared in 82% yield from 6-O-acetyl-2,3,4-tri-O-benzyl-D-manno-1,5-lactone(13) . Preparation of 9 and 12 was reported in the following literature. See: (a) Koto, S.; Morishima, N.; Takenaka, K.; Kanemitsu, K.; Shimoura, N.; Kase, M.; Kojiro, S.; Nakamura, T.; Kawase, T.; Zen, S. Bull. Chem. Soc. Jpn. 1989, 62, 3549.
    • (1989) Bull. Chem. Soc. Jpn. , vol.62 , pp. 3549
    • Koto, S.1    Morishima, N.2    Takenaka, K.3    Kanemitsu, K.4    Shimoura, N.5    Kase, M.6    Kojiro, S.7    Nakamura, T.8    Kawase, T.9    Zen, S.10
  • 26
    • 28844469204 scopus 로고    scopus 로고
    • note
    • 4, the solvent was evaporated under reduced pressure. The crude product was purified by preparative silica gel TLC (EtOAc-hexane = 1:2) to give 2a (45 mg, 93%).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.