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2,3:5,6-Di-O-isopropylidene-3,5-di-C-methyl-l-mannono-1,4-lactone

✍ Scribed by Booth, Kathrine V. ;Jenkinson, Sarah F. ;Fleet, George W. J. ;Watkin, David J.

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
332 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

The relative configuration at C-2 of the title lactone, C 14 H 22 O 6 , which exists in the five-membered ring form, was unequivocally established by X-ray crystallographic analysis. The absolute configuration was determined by the use of 2,4-di-Cmethyl-l-arabinose as the starting material.

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The relative configuration at position C-2 of the title lactone, C 11 H 18 O 6 , which exists in the five-membered ring form, was unequivocally established by X-ray crystallographic analysis. The absolute configuration was determined by the use of 2,4di-C-methyl-l-arabinose as the starting material.

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The relative configuration at position C-2 of the title lactone, C 11 H 18 O 6 , which exists in the five-membered ring form, was unequivocally established by X-ray crystallographic analysis. There are two molecules present in the asymmetric unit (Z 0 = 2). The absolute configuration was determined

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X-ray and conformational investigation of 6-deoxy-6-C-(1,5-di-O-acetyl-2,3-O-isopropylidene-β-d-allo-pentofuranos-5-yl)-1,2:3,4-di-O-isopropylidene- α-d-galactopyranose and 6-C-(benzyl 5-deoxy-2,3-O-isopropylidene-β-d-ribofuranosid-5-yl)-1,2:3,4-di-O-isopropylidene- d-glycero-α-d-galacto-hexopyranose
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The structures of the title compounds (2b and 3) have been investigated in the solid state by X-ray methods. The crystals of 2b are monoclinic, space group P2,, and of 3 orthorhombit, space grtup P2,2,2,. The cell dimensions are: for 2b, a = 9.910(2), b = 11;745W, c = 11.810(3) A, /3 = 97.32(l)"; a