Structure-stability correlations for imine formation in aqueous solution
作者:C. Godoy-Alcántar、Anatoly K. Yatsimirsky、J.-M. Lehn
DOI:10.1002/poc.941
日期:2005.10
Imineformation between 25 aldehydes and 13 amines in aqueoussolution in the pH range 7–11 was studied by 1H NMR spectroscopy. A three-parameter linear equation correlating logarithms of imineformation constants with pKa and HOMO energies of amines and LUMO energies of aldehydes is proposed. In view of the widespread occurrence of imine-forming processes in both chemistry and biology, the data presented
Pyrylium-mediated transformations of natural products. Part 6. Preparation of pyridinium salts derived from aminoglycosides
作者:Alan R. Katritzky、Yu-Kun Yang、Joan Ellison、Jorge Marquet
DOI:10.1039/p29840000879
日期:——
Kanamycins A and B react with a variety of water-soluble pyrylium ions in aqueous solution specifically at the 6′-primary-alkyl primary amine functions to give the corresponding pyridinium ions in high yield. Neomycin also reacts at only one amino group. Products were characterised by 13C n.m.r. and elemental analysis.
卡那霉素A和B与水溶液中的多种水溶性吡啶鎓离子发生反应,特别是在6'-伯烷基伯胺官能团处,以高收率得到相应的吡啶鎓离子。新霉素也仅在一个氨基上反应。产品通过13 C nmr和元素分析进行表征。
Kinetic Selectivity and Thermodynamic Features of Competitive Imine Formation in Dynamic Covalent Chemistry
作者:Sirinan Kulchat、Manuel N. Chaur、Jean-Marie Lehn
DOI:10.1002/chem.201702088
日期:2017.8.16
formed well in a pH dependent way. On the other hand, in organic solvents, the kinetic product was the imine derived from an aliphatic amine and the thermodynamic products were oxime and hydrazone. The insights gained from these experiments provide a basis for the implementation of imineformation in selective derivatization of mono‐amines in mixtures as well as of polyfunctional compounds presenting
Oxygen scavenging compositions and packaging comprising said compositions
申请人:Constar International Inc.
公开号:EP2460855A2
公开(公告)日:2012-06-06
The instant invention concerns an oxygen scavenging material suitable for use in a barrier wall whose oxidative decomposition products comprise one or more aldehydes that are toxicologically innocuous.
The instant invention further concerns a composition comprising a base polymer, at least one compound of the formula E-(L-E)x wherein: E is formula (I) or formula (II) and L is a linking group; and at least one transition metal in a positive oxidation state. The invention also concerns packages containing walls comprising such compositions, methods of forming such packages, and methods of packaging an oxygen-sensitive item within such a package.