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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 21, Number 6
BKCSDE 21(6)
June 20, 2000 

 
Title
Direct Syntheses of β- Nannopyranosyl Disaccharides from 4,6-O-Benzylidene Derivatives of Ethylthio α-D-Mannopyranosides Donors
Author
Mikyung Yun, Youngsook Shin, Keun Ho Chun, Jeong E. Nam Shin
Keywords
Abstract
β-D-Mannopyranosyl disaccharides have been obtained from the coupling of 4,6-O-benzylidene derivatives of ethylthio α-D-mannopyranoside employing NIS-TfOH promoter. NIS-TfOH promoted couplings of the corresponding ethylthio β-D-glucopyranoside and produced α-D-glucopyranosyl disaccharides. IDCP (iodonium dicollidine perchlorate) was inactive toward the 4,6-O-benzylidenated ethylthio glucopyranosyl donor. However,lDCP coupled the 4,6-O-benzylidenated ethylthio-β-D-galactopyranoside to give a-D-galactopyranosyl disaccharides.
Page
562 - 566
Full Text
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