Abstract
Diesters or dibasic acids having hetero atoms at positions β to the carbonyl group underwent polycondensation reaction with diamines to form polyamide under mild conditions at relatively low temperature either in solution or in the solid phase. The reactivity enhancement of diesters or dibasic acids due to the introduction of β-hetero atoms could be arranged in the same order of electronegativities: —O—≥—S—>—N=>SO2—>—P=.The effect of these hetero atoms on the reactivity was presumed to be due to the intramolecular interaction between the hetero atoms and the carbonyl group of the ester or acid.
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References
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Ogata, N., Sanui, K. & Okouchi, K. Active Polycondensation of Dicarboxylic Acid Derivatives Having β-Hetero Atoms. Polym J 5, 186–194 (1973). https://doi.org/10.1295/polymj.5.186
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DOI: https://doi.org/10.1295/polymj.5.186