ピペラジン誘導体からポリウレタンの合成
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概要
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Polyurethanes containing piperazine rings were synthesized from piperazine derivatives and diols. Diethyl piperazine-N, N-dicarboxylate failed to give polymers, diphenyl piperazine-N, N-dicarboxylate gave polymers of low molecular weight. Interfacial polycondensation between piperazine-N, N-dicarbonyl chloride and diols gave polyurethaneureas, whereas melt polycondensation afforded polyurethanes. The polyurethanes derived from piperazine-N, N-dicarbonyl chloride and Bisphenol A showed a m.p. of 278°C. It is insoluble in formic acid, chloroform, 2<I>N</I> sulfuric acid, 2<I>N</I> sodium hydroxide. It, however, is soluble in <I>m</I>-cresol.
- 社団法人 有機合成化学協会の論文