โ Scribed by Brigitte I. Voit; Dieter Wolf
No coin nor oath required. For personal study only.
Perfectly branched polyamide dendrons based on 5-(2-aminoethoxy)-isophthalic acid have been synthesized up to generation 4 following the convergent approach. This involved a repetitive reaction of 5-(2-tbutoxycarbamylethoxy)-isophthalic acid with the two fold excess of 5-(2-aminoethoxy-hydrochloride)-isophthalic acid dimethyl ester and its analogs of higher generation, respectively, using activation and protection methods from the peptide chemistry. The products were characterized via elemental analysis, different spectroscopic methods, gel permeation chromatograpy, and differential scanning calorimetry.
๐ SIMILAR VOLUMES
A series of new soluble polyamides having isopropylidene-and methylsubstituted arylene ether moieties in the polymer chain were prepared by the direct polycondensation of 3,3 ,5,5-tetramethyl-2,2-bis[4-(4-aminophenoxy)phenyl]propane (TBAPP ) and various aromatic dicarboxylic acids in N-methyl-2-pyrr