Synthèse et Caractérisation des Trois Premiers Oligomermères de l'Acide α-L-Glutamique. I
✍ Scribed by M. Rinaudo; A. Domard; G. Spach
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1973
- Tongue
- English
- Weight
- 552 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0006-3525
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
In the present work, the synthesis of the three primary oligomers of α‐L‐glutamic acid is described; the general formula is the following:
magnified image
The choice of protective groups at the both ends of the chain allows for the good solubility in the water and the liberation of free carboxyl groups on the side chain. Thus, models are obtained for the study of thermodynamic properties of solutions and especially of the interactions between polyanions and cations. The prepared products are characterized by different techniques such as mass spectrometry potentiometry, tonometry, and thin‐layer chromatography. The results are in agreement and lead to the conclusions that the molecules have the general formula of [I] and are stereoregular.
📜 SIMILAR VOLUMES
## Abstract Potentiometric neutralization of oligomers represented by the general formula shown was studied. magnified image The intrinsic p__K__ of carboxyl function was found to be 4.40 at 25°C; the variation of the apparent p__K__~a~, Δ__K__(α), was studied as a function of the degree of neutral
R6sum~--Le but de ce travail est de synthetiser et de caracteriser des 6talons de polychlorure de vinyle prepar+s par telomerisation. Les masses moleculaires recherch+es sont comprises entre 200 et 2000. Par catalyse redox, nous obtenons des t+lomeres dont les masses varient de 200-1000, tandis que
## Abstract The synthesis of a water‐soluble azo initiator was performed in four steps: action of hydrazinium sulfate onto 4‐phenylbutan‐2‐one followed by an addition of hydrogen cyanide onto the azine, then oxydation with bromine and finally chlorosulfonation of the obtained aromatic azo compound.
## Abstract The synthesis of 2‐acrylamido‐2‐methylpropanoic acid (2A2MPA) was carried out starting from 2‐methylpropanoic acid. Copolymerizations of the 2A2MPA salt (2A2MPANa, monomer A) with acrylamide (AM, monomer B) were investigated using K~2~S~2~O~8~ as initiator. They were terminated before r