三种1,6-脱水-β-D-吡喃葡萄糖衍生物。

Three 1,6-anhydro-beta-D-glycopyranose derivatives.

作者信息

Foces-Foces C

机构信息

Instituto Rocasolano, CSIC, Departamento de Cristalografía, Serrano 119, E-28006, Madrid, Spain.

出版信息

Acta Crystallogr C. 2001 Mar;57(Pt 3):298-301. doi: 10.1107/s0108270100019065.

DOI:10.1107/s0108270100019065

PMID:11250585

Abstract

Two of the title compounds, 1,6-anhydro-2,3-O-(S)-benzylidene-beta-D-mannopyranose, C(13)H(14)O(5), (I), and 1,6-anhydro-4-O-benzyl-beta-D-mannopyranose, C(13)H(16)O(5), (II), are derived from beta-D-mannopyranose, while the third, 1,6-anhydro-3,4-O-(S)-benzylidene-beta-D-galactopyranose, C(13)H(14)O(5), (III), is derived from beta-D-galactopyranose. In the crystal packing, each hydroxyl group is involved in O-H.O hydrogen bonds, where the acceptor group is the other hydroxyl group in (II), or the endocyclic O atoms of the dioxolane [in (I)], anhydro [in (II)] or pyranose [in (III)] rings. Differences in the crystal packing arise from the contrasting O--H...O hydrogen-bonding environments.

摘要

两种标题化合物，即1,6-脱水-2,3-O-(S)-亚苄基-β-D-甘露吡喃糖，C(13)H(14)O(5)，(I)，以及1,6-脱水-4-O-苄基-β-D-甘露吡喃糖，C(13)H(16)O(5)，(II)，由β-D-甘露吡喃糖衍生而来，而第三种化合物，1,6-脱水-3,4-O-(S)-亚苄基-β-D-吡喃半乳糖，C(13)H(14)O(5)，(III)，则由β-D-吡喃半乳糖衍生而来。在晶体堆积中，每个羟基都参与了O-H…O氢键的形成，其中在(II)中受体基团是另一个羟基，或者在(I)中是二氧戊环的环内O原子、(II)中的脱水环、(III)中的吡喃糖环。晶体堆积的差异源于不同的O-H…O氢键环境。