Method for the synthesis of amides and related products from esters or ester-like compounds
申请人:Gojon-Zorrilla Gabriel
公开号:US20050027120A1
公开(公告)日:2005-02-03
A versatile, eco-friendly, and efficient method for the convenient conversion of esters and ester-like compounds into amides, peptides, carbamates, ureas, oxamides, oxamates, hydrazides, oxazolidinones, pyrazolones, oxazolidinediones, barbituric acids, and other molecules containing one or more OCN moieties in the presence of a diol or polyol is disclosed.
N-[2-hydroxy-3-(2H-benzotriazol-2-yl)benzyl]oxamides as light stabilisers
申请人:ELF ATOCHEM NORTH AMERICA, INC.
公开号:EP0593936A1
公开(公告)日:1994-04-27
This invention relates to novel UV absorbers, their methods of preparation, their use in stabilizing polymers and polymers so stabilized against the degradative effects of UV light. The novel compounds of formula I are oxamides which are substituted on one or both nitrogens with
a 2-hydroxy-3-(2H-benzotriazol-2-yl)benzyl group. The 2-hydroxy-3-(2H-benzotriazol-2-yl)benzyl groups are efficient UV absorbing groups and the oxamide group contributes additional light stabilizing, heat stabilizing and metal complexing properties to the compounds. The compounds have low-volatility and are especially useful as UV stabilizers for engineering resins processed at high temperatures.
Slow magnetic relaxation in mononuclear gadolinium(III) and dysprosium(III) oxamato complexes
作者:Tamyris T. da Cunha、Vitor M.M. Barbosa、Willian X.C. Oliveira、Carlos B. Pinheiro、Emerson F. Pedroso、Wallace C. Nunes、Cynthia L.M. Pereira
DOI:10.1016/j.poly.2019.04.056
日期:2019.9
they crystallize in the P21/n space group of the monoclinic system. The crystal structures of 1–4 consist of mononuclear lanthanide(III) complex anions, [Ln(4-HOpa)4(H2O)]− (Ln = Eu3+, Gd3+, Dy3+, and Ho3+), coordinated sodium(I) countercations, and crystallization water molecules, resulting in a 2D NaILnIII supramolecular coordination network. The coordination sphere of Ln3+ ions consists of square-face