Synthesis of 2-amino-2-deoxy- and 3-amino-3-deoxy-α-d-mannopyranosyl α-d-mannopyranoside by sequential osmylations of a dienic disaccharide
作者:Hans H. Baer、Lisa Siemsen
DOI:10.1016/0008-6215(86)85024-8
日期:1986.1
3-dideoxy-α- d - erythro -hex-2-enopyranoside with chloramine-T and osmium tetraoxide gave 4,6-di- O -acetyl-2-deoxy-2-( p -toluene-sulfonamido)-α- d -mannopyranosyl 4,6-di- O -acetyl-2,3-dideoxy-α- d - erythro -hex-2-enopyranoside and its 3-deoxy-3-( p -toluenesulfonamido) regioisomer, each in 18–19% isolated yield. Osmium tetraoxide-catalyzed cis -hydroxylation of the remaining alkenic residue in these products
摘要4,6-二-O-乙酰基-2,3-二脱氧-α-d-赤型-hex-2-烯吡喃糖基4,6-二-O-乙酰基-2,3-二脱氧-α-d的部分氧化-用氯胺-T和四氧化的赤-己基-2-烯吡喃糖苷得到4,6-二-O-乙酰基-2-脱氧-2-(对甲苯磺酰胺基)-α-d-甘露吡喃糖基4,6-二-O-乙酰基-2,3-二脱氧-α-d-赤-己基-2-烯吡喃糖苷及其3-脱氧-3-(对甲苯磺酰胺基)区域异构体,各自的分离产率为18–19%。这些产物中剩余的烯基残基的四氧化-催化的顺式羟基化导致高收率得到相应的具有α-d-甘露聚糖,α-d-甘露聚糖构型的三醇。