1-O-Acetyl-3,4,6-tri-O-benzyl-2-C-bromomethyl-2-deoxy-α-D-glucopyranose

Abstract

Key indicators: single-crystal X-ray study; T = 100 K; mean (C-C) = 0.006 Å; R factor = 0.041; wR factor = 0.096; data-to-parameter ratio = 13.8.In the title compound, C 30 H 33 BrO 6 , the pyranose ring adopts a chair conformation. Two of the O-benzyl phenyl rings lie almost perpendicular to C/C/C/O plane formed by the ring atoms not attached to these O-benzyl phenyl rings, and form dihedral angles of 85.1 (2) and 64. 6 (2) , while the third Obenzyl phenyl ring is twisted so that it makes a dihedral angle 34.9 (2) to this C/C/C/O plane. This twist is ascribed to the formation of an S(8) loop stabilized by a weak intramolecular C-HÁ Á ÁO hydrogen bond. Related literature