N,O-carboxymethyl chitosan and preparative method therefor

Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives

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426273, 426302, C08B 3708

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active

046199950

ABSTRACT:
A novel chitosan derivative, having carboxymethyl substituents on some of both the amino and primary hydroxyl sites of the glucosamine units of the chitosan structure, is disclosed, together with methods for its preparation starting from either chitosan or chitin.

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L. A. Nud'ga et al., "O-Alkylation of Chitosan", Journal of General Chemistry of the USSR, Jun. 1, 1974, pp. 2729-2732 (Translation by Consultants Bureau, Plenum Publishing Corp. of Zhurnal Obshchei Khimii, vol. 43, No. 12, pp. 2752-2756, Dec. 1973).
Riccardo A. A. Muzzarelli et al., "N-(Carboxymethylidine) Chitosans and N-(Carboxymethyl) Chitosans: Novel Chelating Polyampholytes . . . ", Carbohydrate Research, 107 (1982) pp. 199-214, Elsivier Scientific Publishing Co.
Koshugi et al., "Chem. Abst.", vol. 95, 1981, p. 45101(m).
Hirano et al., "Chem. Abst.", vol. 95, 1981, p. 11389l.

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