Unexpected transformation of 2,3,4,6-tetra-O-acetyl-d-glucopyranosylidene 1,1-diazide with triphenylphosphine
✍ Scribed by József Kovács; István Pintér; Mária Kajtár-Peredy; Jean-Pierre Praly; Gérard Descotes
- Book ID
- 102994049
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 180 KB
- Volume
- 279
- Category
- Article
- ISSN
- 0008-6215
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📜 SIMILAR VOLUMES
Standinger reaction of acetylatod (IR)-l-azido-D-galact~l ~.~de (1) with triphenylphosphine in diethyl ether led to the molation of a crystalline phosphazide (2), in carbohydrate chemistry. Spontaneous decomposition of 2 in toluene furnished the rmxtme of the unsaturated lactone 4, as minor product,
## Crystals of the tetrasaccharide, (2,3,4,6-tetra-0acetyl-fi-D-ghxopyranosyl~-(1 + 3)-[2,3,4,6-tetra-O-acetyI+LD-gIucopyranosyI-(1 --t 6)]-(2,4-di-0-acetyl-g\_D-glucopyranosyl)-1 --) 3)-1,2,4,6-tetrad-acetyl$?-n-ghicopyranose, belong to tge monoclinic system, space group P2,, with a = 12.709(4),
Two independent molecules comprise the asymmetric unit of the title compound, C 15 H 19 F 3 O 12 S, which was synthesized by reacting 1,3,4,6-tetra-O-acetyl--d-mannopyranose with trifluoromethanesulfonic anhydride. In one molecule three F atoms and one O of the -SO 2 CF 3 side chains are disordered