Prostacyclin: evidence that intramolecular general-acid catalysis by its carboxylic acid group is responsible for the extra hydrolytic lability

1986 ◽  
Vol 108 (14) ◽  
pp. 4192-4196 ◽  
Author(s):  
Y. Chiang ◽  
M. J. Cho ◽  
B. A. Euser ◽  
A. Jerry. Kresge
Keyword(s):  
Carboxylic Acid ◽  
Acid Catalysis ◽  
Acid Group ◽  
Carboxylic Acid Group ◽  
General Acid

The inner salt 4-carboxy-2-(pyridinium-4-yl)-1H-imidazole-5-carboxylate monohydrate

2006 ◽  
Vol 62 (7) ◽  
pp. o2751-o2752 ◽  
Author(s):  
Ting Sun ◽  
Jian-Ping Ma ◽  
Ru-Qi Huang ◽  
Yu-Bin Dong
Keyword(s):  
Carboxylic Acid ◽  
Dihedral Angle ◽  
Title Compound ◽  
Acid Group ◽  
Planar Structure ◽  
Carboxyl Group ◽  
Carboxylic Acid Group ◽  
Pyridyl Group ◽  
Compound C

In the title compound, C10H7N3O4·H2O, one carboxyl group is deprotonated and the pyridyl group is protonated. The inner salt molecule has a planar structure, apart from the carboxylic acid group, which is tilted from the imidazole plane by a small dihedral angle of 7.3 (3)°.

scholarly journals Crystal structure of betulinic acid methanol monosolvate

2014 ◽  
Vol 70 (12) ◽  
pp. o1242-o1243 ◽  
Author(s):  
Wei Tang ◽  
Neng-Hua Chen ◽  
Guo-Qiang Li ◽  
Guo-Cai Wang ◽  
Yao-Lan Li
Keyword(s):  
Carboxylic Acid ◽  
Solvent Molecule ◽  
Acid Group ◽  
Carboxylic Acid Group ◽  
Syzygium Jambos ◽  
Carboxylic Acid Groups ◽  
Pentacyclic Triterpenoid ◽  
Naturally Occurring ◽  
Dimensional Network ◽  
Chinese Medicinal Plant

The title compound [systematic name: 3β-hydroxylup-20(29)-en-28-oic acid methanol monosolvate], C30H48O3·CH3OH, is a solvent pseudopolymorph of a naturally occurring plant-derived lupane-type pentacyclic triterpenoid, which was isolated from the traditional Chinese medicinal plantSyzygium jambos(L.) Alston. The dihedral angle between the planes of the carboxylic acid group and the olefinic group is 12.17 (18)°. TheA/B,B/C,C/DandD/Ering junctions are alltrans-fused. In the crystal, O—H...O hydrogen bonds involving the hydroxy and carboxylic acid groups and the methanol solvent molecule give rise to a two-dimensional network structure lying parallel to (001).

scholarly journals Studies on Adhesion Properties of Grafted EPDM Containing Carboxylic Acid Group

2012 ◽  
Vol 13 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Dongho Kim ◽  
Yoomi Yoon ◽  
Ildoo Chung ◽  
Chanyoung Park ◽  
Jongwoo Bae ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Acid Group ◽  
Carboxylic Acid Group ◽  
Adhesion Properties ◽  
Grafted Epdm

Isolated complexes of the amino acid arginine with polyether and polyamine macrocycles, the role of proton transfer

2017 ◽  
Vol 19 (46) ◽  
pp. 31345-31351 ◽  
Author(s):  
Juan Ramón Avilés-Moreno ◽  
Giel Berden ◽  
Jos Oomens ◽  
Bruno Martínez-Haya
Keyword(s):  
Amino Acid ◽  
Carboxylic Acid ◽  
Proton Transfer ◽  
Acid Group ◽  
Side Group ◽  
Carboxylic Acid Group

Protonated arginine interacts with 12-crown-4 through the guanidinium side group. In the complex with the N-substituted analog cyclen, the dominant conformation is the result of the proton transfer from the carboxylic acid group of the amino acid to the macrocycle.

scholarly journals Synthesis and evaluation of novel dental monomer with branched aromatic carboxylic acid group

2011 ◽  
Vol 100B (2) ◽  
pp. 569-576 ◽  
Author(s):  
Jonggu Park ◽  
Qiang Ye ◽  
Viraj Singh ◽  
Sarah L. Kieweg ◽  
Anil Misra ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Acid Group ◽  
Carboxylic Acid Group ◽  
Aromatic Carboxylic Acid
Sign in / Sign up

Export Citation Format

Share Document