Direct Polyamidation of N N -(4 4 -Hexafluoroisopropylidendiphthaloyl)-bis-L-isoleucine with Different Aromatic Diamines via Vilsmeier Adduct Derived from Tosyl Chloride and N N-Dimethylformamide

Direct Polyamidation of N N -(4 4 -Hexafluoroisopropylidendiphthaloyl)-bis-L-isoleucine with Different Aromatic Diamines via Vilsmeier Adduct Derived from Tosyl Chloride and N N-Dimethylformamide
-