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Functional polymers LII Synthesis and polycondensation of 2(2,4-Dihydroxyphenyl)2H-1,3-bis[4-carboxy (or 4-carbomethoxy)2H-benzotriazole]

Funktionelle Polymere, 52. Mitt.: Synthese und Polykondensation von 2(2,4-Dihydroxyphenyl)2H-1,3-[bis-4-carboxy (oder 4-carbomethoxy)2H-benzotriazol]

  • Organische Chemie Und Biochemie
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Abstract

Carboxy- and carbomethoxy derivatives of resorcinols with two benzotriazole substituents have been synthesized. 2(2,4-Dihydroxyphenyl)2H-1,3-bis-(4-carboxybenzotriazole) [2,4-bis(2H-4′-carboxybenzotriazole-2-yl)-1,3-dihydroxybenzene] (DCBDH) was prepared by azo coupling of 4-carboxy-2-nitrobenzene diazonium chloride with resorcinol followed by reductive cyclization. 2(2,4-Dihydroxyphenyl)2H-1,3-bis(4-carbomethoxy-benzotriazole) [2,4-bis-(2H-4′-carbomethoxy-benzotriazole-2-yl)-1,3-dihydroxybenzene] (DCMBDH) was obtained by esterification of the free dicarboxylic acid with methanol. The compounds were characterized by their elemental analyses and melting points, and by their IR, UV,1H NMR, and13C NMR spectra.

Copolycondensations were carried out to incorporateDCBDH orDCMBDH into polyamides or polyesters. The condensation copolymers were briefly characterized.

Zusammenfassung

Es wurden Carboxy- und Carbomethoxy-Derivate von Resorcin mit zwei Benzotriazol-Substituenten dargestellt. 2(2,4-Dihydroxyphenyl)2H-1,3-bis-(4-carboxybenzotriazol) [2,4-Bis(2H-4′-carboxybenzotriazol-2-yl)-1,3-dihydroxybenzol] (DCBDH) wurde über Azokupplung von 4-Carboxy-2-nitrobenzol-diazoniumchlorid mit Resorcin, gefolgt von reduktiver Cyclisierung, synthetisiert. 2(2,4-Dihydroxyphenyl)2H-1,3-bis-(4-carbomethoxybenzotriazol) [2,4-Bis-(2H-4′-carbomethoxybenzotriazol-2-yl)-1,3-dihydroxybenzol] (DCMBDH) erhielt man mittels Veresterung der freien Dicarbonsäure mit Methanol. Die Verbindungen wurden mittels Elementaranalysen und spektroskopisch charakterisiert (IR, UV,1H und13C NMR). Es wurden Copolymerisationen zur Inkorporierung vonDCBDH undDCMBDH in Polyamide und Polyester durchgeführt. Die Kondensationskopolymeren werden kurz charakterisiert.

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Functional Polymers LI:M. D. Purgett,W. J. MacKnight, andO. Vogl, Polym. Eng. and Sci.27(19), 1461 (1987)

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Fu, S., Li, S. & Vogl, O. Functional polymers LII Synthesis and polycondensation of 2(2,4-Dihydroxyphenyl)2H-1,3-bis[4-carboxy (or 4-carbomethoxy)2H-benzotriazole]. Monatsh Chem 119, 1299–1309 (1988). https://doi.org/10.1007/BF00808310

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  • DOI: https://doi.org/10.1007/BF00808310

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