Two piperidine derivatives (6 and 17) containing fused 1,6-anhydro-β-D-hexopyranose moiety were prepared from 1,6-anhydro-β-D-glucopyranose (1). The first synthetic route led via the known 1,6:2,3-dianhydro-4-deoxy-4-(3-hydroxypropyl)-β-D-mannopyranose (2) obtained in four steps from 1. Its hydroxyl group was converted into amino group via tosylate and azide. The corresponding amino epoxide 5 readily rearranged into 3-amino-1,6-anhydro-3,4-dideoxy-3-N,4-C-(propane-1,3-diyl)-β-D-altropyranose (6). The second route used the known 1,6-anhydro-2,4-di-O-tosyl-β-D-ribo-hexopyranos-3-ulose (9) as an intermediate. Addition of allylmagnesium chloride to ketose 9 afforded 3-C-allyl-1,6-anhydro-2,4-di-O-tosyl-β-D-allopyranose (10). Hydroboration of its double bond followed by transformation of the resulting primary hydroxyl group into tosylamido group gave tritosyl derivative 15. Intramolecular replacement of the tosyloxy group in position 4 by tosylamido group gave tosylated piperidine derivative 16. Detosylation of 16 afforded the target 4-amino-1,6-anhydro-3,4-dideoxy-3-C,4-N-(propane-1,3-diyl)-β-D-gulopyranose (17).
制备了两种含有融合的1,6-去
水β-D-己糖苷基的
哌啶衍
生物(
6和
17),它们是由1,6-去
水β-
D-葡萄糖苷(
1)制备而成。第一种合成路线通过已知的1,6:2,3-二去
水-4-去氧-4-(3-羟基丙基)-β-
D-甘露糖苷(
2)制备,该化合物经过四步反应从
1得到。其羟基经过tosylate和azide转化为
氨基。相应的
氨基环氧化合物
5很容易重排成3-
氨基-1,6-去
水-3,4-二去氧-3-
N,4-
C-(
丙烷-1,3-二基)-β-D-阿尔卓糖苷(
6)。第二种路线使用已知的1,6-去
水-2,4-二-
O-tosyl-β-D-
核-己糖苷-3-酮(
9)作为中间体。将烯
丙基氯化镁加入酮糖
9中,得到3-
C-烯丙基-1,6-去
水-2,4-二-
O-tosyl-β-
D-阿洛糖苷(
10)。其双键的氢化后,将产生的一级羟基转化为tosylamido基团,得到tritosyl衍
生物15。将位置4的tosyloxy基团通过分子内置换为tosylamido基团,得到tosyl化的
哌啶衍
生物16。将
16去除tosyl基团,得到目标化合物4-
氨基-1,6-去
水-3,4-二去氧-3-
C,4-
N-(
丙烷-1,3-二基)-β-
D-古罗糖苷(
17)。