Corrosion-protective properties of 1-phenacylmethyl-2-arylcarbamido(arylthiocarbamido)pyridinium bromides
摘要:
Inhibiting effect of 1-phenacylmethylpyridiilium bromides containing urea or thiourea substituents in the pyridinium ring on steel and zinc corrosion in sulfuric acid solutions was studied.
Synthesis of Unsymmetrical 2-Pyridyl Ureas via Selenium-Catalyzed Oxidative Carbonylation of 2-Aminopyridine with Aromatic Amines
作者:Xiaopeng Zhang、Guisheng Zhang、Desheng Li、Xueji Ma、Yan Wang
DOI:10.1055/s-0033-1338413
日期:——
2-aminopyridine and various aromatic amines is reported for the first time. The procedure employs inexpensive selenium as the catalyst, and carbonmonoxide (instead of phosgene) as the carbonyl reagent. The products are obtained in moderate to good yields via selenium-catalyzed oxidative cross-carbonylation of the substrate amines in the presence of oxygen. The selenium functions as a phase-transfer catalyst and
Synthesis of unsymmetrical urea from aryl- or pyridyl carboxamides and aminopyridines using PhI(OAc)<sub>2</sub><i>via in situ</i> formation of aryl- or pyridyl isocyanates
作者:Joydev K. Laha、Neha Singh、Mandeep Kaur Hunjan
DOI:10.1039/d1nj03160k
日期:——
previously, attempts have been made to trap the isocyanates. While the three pyridylisocyanates were trapped as their corresponding carbamates, 3-pyridylisocyanate was isolated and characterized. Unlike closely related previous methods reported for urea synthesis, the current method avoids direct use of isocyanates or eliminates the use of toxic phosgene for the in situ generation of isocyanates.
“Urea to Urea” Approach: Access to Unsymmetrical Ureas Bearing Pyridyl Substituents
作者:Svetlana O. Kasatkina、Kirill K. Geyl、Sergey V. Baykov、Mikhail S. Novikov、Vadim P. Boyarskiy
DOI:10.1002/adsc.202101490
日期:2022.3.30
A protocol for the synthesis of unsymmetrical ureas substituted by pyridyl/quinolinyl moiety has been developed. This method concluded in metal- and base-free reamination of N,N-dimethyl-N‘-hetaryl ureas with a wide range of aryl and alkyl amines. The isolated yields vary from 40 to 96% depending on the nucleophilicity of the amines. The scope of this method includes more than 50 examples. The reaction
[EN] CELL ADHESION INHIBITORS<br/>[FR] INHIBITEURS DE L'ADHERENCE CELLULAIRE
申请人:BIOGEN, INC.
公开号:WO1996022966A1
公开(公告)日:1996-08-01
(EN) The present invention relates to novel compounds that are useful for inhibition and prevention of cell adhesion and cell adhesion-mediated pathologies. This invention also relates to pharmaceutical formulations comprising these compounds and methods of using them for inhibition and prevention of cell adhesion and cell adhesion-mediated pathologies. The compounds and pharmaceutical compositions of this invention can be used as therapeutic or prophylactic agents. They are particularly well-suited for treatment of many inflammatory and autoimmune diseases.(FR) L'invention concerne de nouveaux composés utiles pour inhiber et prévenir l'adhérence cellulaire, ainsi que les pathologies provoquées par l'adhérence cellulaire. Elle concerne également des compositions pharmaceutiques contenant ces composés, ainsi que des procédés permettant de les utiliser pour inhiber et prévenir l'adhérence cellulaire et les pathologies provoquées par l'adhérence cellulaire. On peut utiliser ces composés et ces compositions pharmaceutiques en tant qu'agents thérapeutiques et prophylactiques. Ils sont particulièrement appropriés pour le traitement de nombreuses maladies inflammatoires et auto-immunes.
The present invention relates to novel compounds that are useful for inhibition and prevention of cell adhesion and cell adhesion-mediated pathologies. This invention also relates to pharmaceutical formulations comprising these compounds and methods of using them for inhibition and prevention of cell adhesion and cell adhesion-mediated pathologies. The compounds and pharmaceutical compositions of this invention can be used as therapeutic or prophylactic agents. They are particularly well-suited for treatment of many inflammatory and autoimmune diseases.