The opening ot" oxirane rings o1' dianhydro sugars with high regiosclectivily can afford many chiral intermediates Ibr controlling asymmetric syntheses [I-5]. Here, wc report the crystal structure o1' 1,6:3,4~diallhydro-2-Ool~-lolylsullbnyl-~-D°galactopyranose (!) which may provide helpl'ul i111' o1
1,6:3,4-Dianhydro-2-azido-2-deoxy-β-d-galactopyranose
✍ Scribed by Barnes, John C. ;Brimacombe, John S. ;Paterson, Michael J.
- Publisher
- International Union of Crystallography
- Year
- 2002
- Tongue
- English
- Weight
- 188 KB
- Volume
- 58
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
In the title compound, C 6 H 7 N 3 O 3 , the presence of the epoxide group modi®es the bonding in the sugar ring so that the ®ve C atoms within it are coplanar, with a shortening of the formally single CÐC bonds to an average of 1.475 (8) A Ê .
📜 SIMILAR VOLUMES
The molecular structure of the title compound, C 6 H 9 IO 4 , is similar to that of 1,6-anhydro--d-glucopyranose. The crystal packing shows strong intermolecular O-HÁ Á ÁO and C-HÁ Á ÁI hydrogen bonds.
Single-crystal X-ray study T = 120 K Mean '(C±C) = 0.005 A Ê R factor = 0.045 wR factor = 0.108 Data-to-parameter ratio = 9.3 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.