Regio- and stereo-selective transformation of glycosides to amino-glycosides. Practical synthesis of amino-sugars, 4-amino-4-deoxy-D-galactose, 4-amino-4-deoxy-L-arabinose, 3-amino-3-deoxy-D-allose, 3-amino-3-deoxy-D-glucose, 3-amino-3-deoxy-D-ribose, 3-amino-3-deoxy-D-xylose, 2-amino-2-deoxy-D-mannose, and 5-amino-5-deoxy-D-glucose (nojirimycin).
One of the hydroxyl groups in glycosides was regio- and stereo-selectively converted to an amino group as follows. A glycoside was regioselectively converted to an oxo-glycoside by bis-tributyltin oxide-bromine oxidation. Oximation of this and reduction of the resulting oxime in a stereoselective manner gave an amino-glycoside in a satisfactory yield.By application of this method, 4-amino-4-deoxy-D-galactose, 4-amino-4-deoxy-L-arabinose, 3-amino-3-deoxy-D-allose, 3-amino-3-deoxy-D-glucose, 3-amino-3-deoxy-D-ribose, 3-amino-3-deoxy-D-xylose, and 2-amino-2-deoxy-D-mannose were synthesized in satisfactory yields from D-xylose or D-glucose as their α- or β-methyl glycosides. The method also provided a practical synthetic route to nojirimycin (5-amino-5-deoxy-D-glucose), a glucosidase-inhibitory antibiotic, from D-glucose.
New synthesis of (+)-and (–)-nojirimycin from myo-inositol
作者:Noritaka Chida、Yuka Furuno、Seiichiro Ogawa
DOI:10.1039/c39890001230
日期:——
A report of a newsynthesis of nojirimycin (1a), as well as its antipode (1b), from optically active seven-membered hemiacetal lactones (2a,b) derived frommyo-inositol by a five step reaction; the hydrogen sulphite adduct of (1b) shows high inhibitory activity against β-glucosidase and α-mannosidase, being almost comparable to that of mannojirimycin.
New process for the preparation of nojirimycin and related compounds
申请人:MERRELL PHARMACEUTICALS INC.
公开号:EP0433978A2
公开(公告)日:1991-06-26
The present invention relates to an efficient new route for the preparation of (+)-nojirimycin and (+)-1-deoxynojirimycin which involves the steroselective reductive amination of 1,2-O-isopropylidene-5-oxo-α-D-glucuronolactone. The reductive amination uses particular oximes of the 5-oxo compound (Formula II).