- Amorphous Amides
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An amorphous amide compound of the formula wherein R is selected from the group consisting of an alkyl group, an aryl group, an alkylaryl group, an arylalkyl group, and combinations thereof. An amorphous diamide compound of the formula wherein R1 /s
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Paragraph 0141
(2015/04/22)
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- METHOD OF MAKING AMORPHOUS RESIN FOR USE IN ROBUST SOLID INK APPLICATIONS
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Methods for making amorphous resins for use in robust solid ink applications are disclosed in which an organic acid is reacted with an alcohol in the presence of a solvent in the amount of from about 0.5 to about 1.5 grams of solvent per gram of reaction product. The reaction product is an ester of tartaric acid or an ester of citric acid.
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Paragraph 0037; 0038; 0039; 0040; 0041
(2013/06/05)
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- PHASE CHANGE INK COMPONENTS AND METHODS OF MAKING THE SAME
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A solid ink composition comprising an amorphous component, a crystalline material, and optionally, a colorant, which are suitable for ink jet printing, including printing on coated paper substrates, and methods for making the same. In embodiments, the crystalline and amorphous components are synthesized from an esterification reaction of tartaric acid with an alcohol.
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Page/Page column 7
(2012/12/13)
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- 2-Chloro-(4R,5R)-bis[(1R,2S,5R)-menth-1-yloxycarbonyl]-1,3, 2-dioxaphospholane: A practical chiral pool-derived reagent for determining enantiomeric purity of alcohols
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(Chemical Equation Presented) 2-Chloro-(4R,5R)-bis[(1R,2S,5R)-menth-1- yloxycarbonyl)]-1,3,2-dioxaphospholane is a practical reagent for reliably determining enantiomeric purity of chiral alcohols via 31P NMR spectroscopy. The compound is available as a crystalline solid on a 20 g scale from PCl3 and bis[(1R,2S,5R)-menth-1-yl] tartrate. It is comparatively inert toward spontaneous hydrolysis under conventional laboratory conditions but undergoes quantitative substitution of alkoxide for chloride if treated with a chiral alcohol. Nonequivalent 31P NMR signals of diastereomeric 2-alkoxy-1,3,2-dioxophospholanes were dispersed by ~1.4-0.1 ppm. The associated integral ratios reflected enantiomeric purities of preweighted samples of (R)- and (S)-1-phenylethanol, (+)- and (-)-menthol, and a set of primary, secondary, and tertiary alcohols with a precision of ±0.4-1.0%.
- Amberg, Matthias,Bergstraesser, Uwe,Stapf, Georg,Hartung, Jens
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p. 3907 - 3910
(2008/09/20)
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- A Useful Synthesis of Chiral Glyoxylates
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A convenient synthesis of the cyclohexyl, (1R,3R,4S)-3-p-methyl and (1S-endo)-2-bornyl glyoxylates, from the respective alcohols and other very available materials, as a model applicable to that of other chiral, sensitive glyoxylates, is described.
- Fernandez, Franco,Garcia, Gerardo,Rodriguez, Jose E.
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p. 2837 - 2847
(2007/10/02)
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- Structural Aspects of the Enantioselectivity of Tartrates with α-Amino-alcohol Salts. Part I. Crystal Structures of Eleven Tartaric-Acid Diesters
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Enantioselective host-guest complexes of α-amino-alcohol salt with chiral tartaric-acid esters can not be crystallised up to now.To study structural aspects of their enantioselectivity, crystal structures of the components were determined.The structures of eleven diesters with myrnatol, borneol, menthol, neomenthol, and cis-4-(tert-butyl)cyclohexanol in different configurations showed a remarkable rigidity of the tartaric-acid conformation, partly because of intermolecular H-bonding between OH and C=O groups.The conformation of the tartaric-acid part in these diesters is the same as the one observed in optically active tartaric acid (torsion angle O=C-C-OH ca. 0 deg).The binding site for guest molecules is a parallelogram formed by two hydroxy and two carbonyl O-atoms, all lying on the same side of a mean molecular plane.There is one exception: the dimenthyl ester, which is the most enantioselective with a norephedrine guest, has one of the ester groups turned (torsion angle O=C-C-OH ca. 180 deg), forming a triangle of O-atoms and moving the bulky menthyl group to the vicinity of the binding site.
- Egli, Martin,Dobler, Max
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p. 1136 - 1150
(2007/10/02)
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