The Synthesis of New Asymmetric Double Schiff Bases Containing a New<i>o</i>‐Amino Benzoic Acid Derivative
作者:Yongqing Liang、Biyun Su、Jianshe Zhao、Wenhua Sun
DOI:10.1081/scc-200028639
日期:2004.1
Abstract A new o‐amino benzoic acidderivative, 2‐amino‐N‐phenyl‐benzamide, has been obtained by the reaction of o‐amino benzoic acid and aniline. Twelve new asymmetric Schiff bases, which have both and functional groups containing 2‐amino‐N‐phenyl‐benzamide, have been synthesized and characterized.
Azide trapping of metallocarbenes: generation of reactive C-acylimines and domino trapping with nucleophiles
作者:Tina M. Bott、Bren Jordan Atienza、F. G. West
DOI:10.1039/c4ra06044j
日期:——
Diazocarbonyl compounds react with pendent azides under copper catalysis to generate reactive C-acylimines that can be trapped with carbon π-nucleophilesin situ.
High molecular weight poly-(toluenediamine aramides) and a method for their preparation
申请人:AIR PRODUCTS AND CHEMICALS, INC.
公开号:EP0348825A2
公开(公告)日:1990-01-03
This invention relates to high molecular weight toluenediamine - containing polyamide resins formed by the reaction of a mixture of 2,4-toluenediamine and 2,6-toluenediamine and derivatives thereof with an aromatic diacid or precurser thereof. The resulting polyamides are amorphous, as opposed to crystalline. Because they are amorphous, they lend themselves to a wide variety of processing techniques and because of their high molecular weight, they have outstanding physical properties.
The polyamides are prepared using a precondensate method wherein a mixture of the toluenediamine isomers and aromatic acid, usually in the form of the aromatic acid dihalide, is reacted at relatively low temperatures forming a precondensate and the precondensate subsequently polymerized in the presence of an acid acceptor.