作者:Dominique Lafont、Andreas Wollny、Paul Boullanger
DOI:10.1016/s0008-6215(98)00089-5
日期:1998.8
lphosphonioamino- β - d -glycopyranose salts thus obtained were transformed into the corresponding 2,3,4-tri- O -acetyl-6-amino-1,6-anhydro-6-deoxy- β - d -glycopyranoses which were further N -acylated or N -alkoxycarbonylated. 1 H and 13 C NMR of these products show the occurrence of two rotamers in solution, due to restricted rotations around the amide bond.
摘要
三苯基膦与2,3,4-三-O-
乙酰基-6-O-对
甲苯磺酰基-β-d-糖基
叠氮基
叠氮化物的斯托丁格反应导致了端基异亚
氨基正膦,该异位亚
氨基正膦通过消除C-6处的
磺酸盐而原位重排。将如此获得的1,6-
脱水-6-
脱氧-6-
三苯基膦酰
氨基-β-d-
甘露糖盐转化为相应的2,3,4-三-O-
乙酰基-6-
氨基-1,6-
脱水-盐。进一步被N-酰化或N-烷
氧基羰基化的6-
脱氧-β-d-
甘露聚糖。这些产物的1 H和13 C NMR表明,由于
酰胺键周围的旋转受限,在溶液中存在两个旋转异构体。