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Conformations of tartaric acid and its esters

โœ Scribed by Polavarapu, P. L.; Ewig, C. S.; Chandramouly, T.


Book ID
121220700
Publisher
American Chemical Society
Year
1987
Tongue
English
Weight
617 KB
Volume
109
Category
Article
ISSN
0002-7863

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Conformational disparity of (R,R)-tartar
โœ Jacek Gawronski; Krystyna Gawronska; Urszula Rychlewska ๐Ÿ“‚ Article ๐Ÿ“… 1989 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 247 KB

Exciton chirality method is used to determine anti and gauche conformations, respectively, of ester and dialkylamide derivatives of (R,R)tartaric acid. Gauche conformation of (R,R)-N,N,N'-tetramethyltartamide and its O,O-dibenzoyl derivative is found in the solid state by X-ray analysis.

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The unknown tert-butyl 4a.b of otherwise nonsubstmed esters Za,b and -ethers acid are optical pure (R,R)-tartaric synthesized. Esters acyl protected are made by reaction-of O.O-ditartaric acid with isobutene and selective cleavage via transesterification of the protective groups. Ethers are formed b