3,4-二-O-乙酰基-2,5-脱水-1,6-二-O-（对甲苯磺酰基）-D-甘露糖醇

3,4-di-O-acetyl-2,5-anhydro-1,6-di-O-(p-tolylsulfonyl)-D-mannitol.

作者信息

Shalaby M A, Fronczek F R, Voll R J, Younathan E S

机构信息

Department of Biochemistry, Louisiana State University, Baton Rouge 70803, USA.

出版信息

Acta Crystallogr C. 1995 Sep 15;51 ( Pt 9):1921-3. doi: 10.1107/s0108270195003519.

DOI:10.1107/s0108270195003519

PMID:7576372

Abstract

The title compound, 2,5-bis(4-methylphenylsulfonyloxy-methyl)oxolane-3,4-diyl diacetate, C24H28O11S2, lies on a crystallographic twofold axis. It adopts a perfect twist 3(4)T conformation in the solid state. The puckering parameters of the tetrahydrofuran ring are q = 0.32 (8) A and rho = 92.3 (5) degrees. The acetyl groups are planar, with the non-H atoms deviating less than 0.002 (3) A from their mean plane. They have an (S)-cis conformation with the C-O and C = O bonds eclipsed, and each acetyl group is orientated with the C = O group syndiaxial to the C-H bond at the ring C atom to which the group is attached.

摘要

标题化合物，2,5-双(4-甲基苯磺酰氧基甲基)氧杂环戊烷-3,4-二基二乙酸酯，C24H28O11S2，位于一个晶体学二重轴上。它在固态时采用完美的扭曲3(4)T构象。四氢呋喃环的褶皱参数为q = 0.32(8) Å和rho = 92.3(5)°。乙酰基是平面的，非氢原子偏离其平均平面小于0.002(3) Å。它们具有(S)-顺式构象，C-O和C=O键呈重叠式，并且每个乙酰基的C=O基团与连接该基团的环C原子上的C-H键呈反平行排列。