Abstract
The structure of the major product of the reaction of 1,2-dideoxy-3,4:5,6-di-O-isopropylidene-1-C-nitro-D-arabino-hex-1-enitol with 30% hydrogen peroxide and aqueous sodium hydrogencarbonate has been confirmed by X-ray crystallography to be that of 1,2-anhydro-3,4:5,6-di-O-isopropylidene-1-C-nitro-D-mannitol (2). The crystal structure of 2, C12H19NO7, is orthorhombic, P212121, with cell dimensions a = 10.269(3), b = 15.115(7), c = 9.295(8) Å, and Z = 4. The calculated density is Dx = 1.336 gcm−3. The structure was solved by direct methods and refined to a residual R = 0.052. The molecule has a 2G− conformation having bond lengths and angles in agreement with those observed in related structures, except for the C(1)—C(2), C(2)—C(3), and O(2N)—N bond distances which were found to be unusually small.
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