Tricarbonylchromium complexes of four methyl 4,6-<i>O</i>-[(η<sup>6</sup>-phenyl)alkylidene]-α-<scp>D</scp>-glucopyranosides
作者:C. E. F. Rickard、Y. Singh、P. D. Woodgate、Z. Zhao
DOI:10.1107/s0108270199007313
日期:1999.9.15
The crystal structures of the chiral non-racemic eta(6)-tricarbonylchromium complexes of three methyl 4,6-O-benzylidene-alpha-D-glucopyranosides, (1)-(3), have been determined, as well as that of the 4,6-O-acetal, (4), derived from acetophenone. These compounds are tricarbonyl(R)-methyl 2,3-di-O-methyl-4,6-O-[(1S,3R)(eta(6)-3-trimethylsilylphenyl)methylene]-alpha-D-glucopyranoside}chromium(0), (1), [Cr(C19H30O6Si)(CO)(3)], tricarbonyl(R)-methyl 2, 3-di-O-methyl-4, 6-O-[(1S, 2R)-(eta(6)-2-trimethylsilylphenyl)methylene]-alpha-D-glucopyranoside}chromium(0), (2), [Cr(C19H30O6Si)(CO)3], tricarbonyl(R)-methyl 2,3-O-(1-methylethylidene)-4,6-O-[(eta(6)-phenyl)methylene]-alpha-D-glucopyranoside}chromium(0), (3), [Cr(C17H22O6)(CO)(3)], and tricarbonyl(S)-methyl 2,3-di-O-methyl-4,6-O-[(eta(6)-1-phenyl)ethylene]-alpha-D-glucopyranoside}chromium(0), (4), [Cr(C17H24O6)(CO)(3)].