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).
作者:Yoshisuke TSUDA、Yukihiro OKUNO、Minoru IWAKI、Kimihiro KANEMITSU
DOI:10.1248/cpb.37.2673
日期:——
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.
苷中的一个羟基可通过以下方法进行区域和立体选择性地转化为氨基。通过双三丁基氧化锡-溴氧化作用,苷可以选择性地转化为氧化苷。以立体选择性的方式将其氧化并还原生成的肟,即可得到产率令人满意的氨基糖苷。应用这种方法,以 D-木糖或 D-葡萄糖为α-或β-甲基糖苷,合成了 4-氨基-4-脱氧-D-半乳糖、4-氨基-4-脱氧-L-阿拉伯糖、3-氨基-3-脱氧-D-阿洛糖、3-氨基-3-脱氧-D-葡萄糖、3-氨基-3-脱氧-D-核糖、3-氨基-3-脱氧-D-木糖和 2-氨基-2-脱氧-D-甘露糖,产率令人满意。该方法还提供了一条从 D-葡萄糖中合成诺吉霉素(5-氨基-5-脱氧-D-葡萄糖)的实用途径,诺吉霉素是一种葡萄糖苷酶抑制抗生素。