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Volumn 129, Issue 42, 2007, Pages 12890-12895

A catalytic one-step process for the chemo- and regioselective acylation of monosaccharides

Author keywords

[No Author keywords available]

Indexed keywords

HYDROXYL GROUPS; MONOSACCHARIDES; REGIOSELECTIVE ACYLATION;

EID: 35549002267     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja074882e     Document Type: Article
Times cited : (208)

References (40)
  • 9
    • 33748581386 scopus 로고    scopus 로고
    • Site-selective acylation of erythromycin has recently been developed. See
    • Site-selective acylation of erythromycin has recently been developed. See: Lewis, C. A.; Miller, S. J. Angew. Chem., Int. Ed. 2006, 45, 5616.
    • (2006) Angew. Chem., Int. Ed , vol.45 , pp. 5616
    • Lewis, C.A.1    Miller, S.J.2
  • 10
    • 34250373007 scopus 로고    scopus 로고
    • We recently reported regioselective acylation of 6-O-protected octyl β-D-glucopyranosides by DMAP catalysis. See: Muramatsu, W, Kawabata, T. Tetrahedron Lett. 2007, 48, 5031
    • We recently reported regioselective acylation of 6-O-protected octyl β-D-glucopyranosides by DMAP catalysis. See: Muramatsu, W.; Kawabata, T. Tetrahedron Lett. 2007, 48, 5031.
  • 15
    • 0029876822 scopus 로고    scopus 로고
    • Chiral PPY and DMAP analogues have been developed for enantioselective catalysis. See: a
    • Chiral PPY and DMAP analogues have been developed for enantioselective catalysis. See: (a) Vedejs, E.; Chen, X. J. Am. Chem. Soc. 1996, 118, 1809.
    • (1996) J. Am. Chem. Soc , vol.118 , pp. 1809
    • Vedejs, E.1    Chen, X.2
  • 39
    • 35548941353 scopus 로고    scopus 로고
    • Experimental procedure for Table 3, entry 5: Octyl β-D- glucopyranoside (58.5 mg, 0.20 mmol, 1 (1.7 mg, 2.0 μmol, and 2,4,6-collidine (40 μL, 0.30 mmol) were dissolved in CHCl3 (2.0 mL) at 20°C. After the solution was cooled at -20°C, isobutyric anhydride (36 μL, 0.22 mmol) was added. The resulting mixture was stirred at -20°C for 24 h. The reaction mixture was quenched with saturated aqueous NH4Cl solution and extracted with ethyl acetate. The organic layer was washed with H2O and brine, dried over MgSO4, filtered, and concentrated in vacuo. The residue was purified by SiO2 column chromatography (ethyl acetate/hexane, 30:70 to 100:0) to give a 99:1 mixture of octyl 4-O-isobutyryl-β-D-glucopyranoside and octyl 3-O-isobutyryl-β-D-glucopyranoside in a combined yield of 98, 71 mg, Identification of the regioisomeric products was unambiguously perf
    • 2 column chromatography (ethyl acetate/hexane = 30:70 to 100:0) to give a 99:1 mixture of octyl 4-O-isobutyryl-β-D-glucopyranoside and octyl 3-O-isobutyryl-β-D-glucopyranoside in a combined yield of 98% (71 mg). Identification of the regioisomeric products was unambiguously performed by the comparison with pure regioisomers prepared independently by a conventional protection/deprotection procedure (see Supporting Information).


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