Stereochemistry of carbohydrate derivatives. Part IV. Crystal structure of 3,6-(acetylepimino)-3,6-dideoxy-1,2-O-isopropylidene-β-L-ido-furanose

Abstract

X-Ray crystallographic analysis, by a direct method, has confirmed the structure of title compound (2), the product of solvolysis of 3-acetamido-3-deoxy-1,2-O-isopropylidene-5,6-di-O-methylsulphonyl-α-D-glucofuranose (1) in 95% 2-methoxyethanol. Compound (2) crystallises in the monoclinic space group P2₁, with Z= 2 in a unit cell of dimensions a= 12·13, b= 9·51, c= 5·32 Å, β= 93·74°; the structure was refined to R 0·078 for 946 independent reflections.