Aminocarboxylic acids dicarboxylic acid

It has become the custom to name linear aliphatic polyamides according to the number of carbon atoms of the diamine component (first named) and of the dicarboxylic acid. Thus, the condensation polymer from hexamethylenedi-amine and adipic acid is called polyamide-6,6 (or Nylon-6,6), while the corresponding polymer from hexamethylenediamine and sebacoic acid is called polyamide-6,10 (Nylon-6,10). Polyamides resulting from the polycondensation of an aminocarboxylic acid or from ring-opening polymerization of lactams are indicated by a single number thus polyamide-6 (Nylon-6) is the polymer from c-aminocaproic acid or from e-caprolactam. 

The reactions with formation of polymers also are classified based on another difference in their mechanism. This classification distinguishes step reactions and chain reactions. In step reactions the polymers are built from the monomer by random individual reactions to form dimers, trimers, tetramers, etc., each resulting molecule being able to participate in a subsequent reaction with a monomer or with an oligomer molecule. This type of reaction may start with molecules having two reactive functional groups in one molecule such as an o-aminocarboxylic acid. Another possibility consists of reactions between two different types of bifunctional molecules such as a diamine and a dicarboxylic acid as shown below ... 

Also in 2005 Kong et al. [49] filed a patent application on a process for preparing an aqueous polyamide dispersion by lipase-catalyzed polycondensation of a diamine and a dicarboxylic acid in aqueous medium. In a separate patent application [50], they reported the process for preparing an aqueous polyamide dispersion by lipase-catalyzed reaction of an aminocarboxylic acid compound in aqueous medium. 

Ring closure with the formation of a carbon-nitrogen bond, of the types A-E shown in Fig. 1, has been used to synthesize derivatives of 1-, 2-, and 3-benzazepines, with aminocarboxylic acids, amino halides, dihalides, dinitriles, dicarboxylic acids, and carboxylic acid diamides as starting materials. The yields were generally fair to good. In some cases preferential formation of a five- or six-membered ring was observed. 

Aminocarboxylic acids from dicarboxylic acid anhydrides... 

Another important class of esterquats is the betaine esters (Fig. 7), which are derived from aminocarboxylic acids and thus have a reverse ester group compared to regular esterquats based on alkanolamines [20,21]. Other examples include esterquats derived from amino acids [22,23] or dicarboxylic acids [11,24,25]. 

Sulfoximino-a-aminocarboxylic acids from alkylthio-a-dicarboxylic acids... 

Stereospecificity of the Lossen rearrangement Aminocarboxylic acids from dicarboxylic acid anhydrides via N-hydroxydicarboxylic acid imides and N-sulfonyloxydicarboxylic acid imides... 

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