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
Conformational disparity of (R,R)-tartaric acid esters and amides
โ Scribed by Jacek Gawronski; Krystyna Gawronska; Urszula Rychlewska
- Book ID
- 104244939
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- French
- Weight
- 247 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
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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## Abstract The crystal structure and crystallization behavior of a series of poly(ester amide)s derived from Lโtartaric acid, 1,6โhexanediamine, and 6โaminoโ1โhexanol were examined. The study included __aregic__ polymers containing 5, 10, and 20% of ester groups in addition to the __syndioregic__