In the course of changing the structure of Marfey's reagent by replacing the alanine amide or valine amide moieties by other amino acid amides and the carboxamide group by free carboxyl group, a series of new reagents were developed and applied to the resolution of amino acids,61β-amino ...
PROBLEM TO BE SOLVED: To provide a polymer containing carboxyl groups and amino groups capable of making the crosslink density of a cured resin layer higher, high in hardness, excellent in the dispersibility of micronized pigment, and eluting no pigment in the process following post-baking and ...
The present invention relates to immobilized procainamide analogs, as well as to a method of making immobilized procainamide analogs. These immobilized analogs are prepared by activating the carboxyl group on a substituted p-benzoic acid derivative towar
Tetrahedron Lett. 1994; 35: 6291-6294.R. Pascal et al.; “Carboxyl-protecting Groups Convertible into Activating Groups. Carbamates of o-Aminoanilides are Precursors of Reactive N-Acylureas”; Tetrahedron Letters, vol. 35, No. 34, 1994; pp. 6291-6294 (4 pages)....
A convenient method for carboxyl group activation in trifluoromethyl substituted α-amino and α-hydroxy acids 喜欢 0 阅读量: 24 作者: U Wucherpfennig 摘要: α-Amino and α-hydroxy acids are key compounds in chemistry of life. Only recently preparative routes to their α-trifluoromethyl ...
Berkowitz et al., " Simultaneous Amino and Carboxyl Group Protection by a-Branched Amino Acids, " J. Organic Chem., 59(18), 5476-5478 (1994).Berkowitz D. B,Pedersen M. L.Simultaneous amino and carbonyl group protection forα-branched amino acids. Journal of Organic Chemistry . 1994...
The butadiene-acrylonitrile copolymer comprises (A) a carboxyl polyamide aminocarbonyl group and (B) a polysiloxane aminocarbonyl group and is represented by the formula 1, wherein A and B represent a molar ratio, and A is 100-B and 1-99; k, l and m represent a molar ratio, and m ...
Using the interaction between the α-amine group and α-carboxyl group of amino acids and the copper–nanopore complex to generate current blockade, we developed a copper-ion-functionalized MspA nanopore. This nanopore sensor enables the identification of all 20 proteinogenic amino acids, 2 amino ...
In this context, the salt bridges with the carboxyl group are a form of extra strong hydrogen bonding52. Interaction patterns with the backbone atoms of the amino acid ligand are strikingly consistent within Class II aaRSs. This class forms hydrogen bonds with the primary amine group in 92.15%...
(CHR1)r-, A may also represent an oxygen or sulphur atom; each Y, which may be the same or different, is a group -(CHR1)p-N(CHR1X)2 or a group -CHR1X; each X, which may be the same or different, is a carboxyl group or a derivative thereof or a group R1; each R1, ...