Ácido aldônico

Estrutura química do ácido glucônico, o ácido aldônico derivado da glucose.

Um ácido aldônico (português brasileiro) ou ácido aldónico (português europeu) é um ácido de açúcar obtido pela oxidação do grupo aldeído de uma aldose a ácido carboxílico.[1] Sua fórmula geral é HOOC-(CHOH)n-CH2OH.[1] A oxidação da hidroxila terminal a ácido carboxílico gera um ácido urônico[2] e a oxidação dos dois extremos (a um ácido dicarboxílico) gera um ácido aldárico.[3]


A nomenclatura dos ácidos aldônicos e suas lactonas é baseada na transformação de X-ose em ácido X-onico ou X-onolactose, respectivamente; assim, a D-glucose é oxidada ao ácido D-glucônico e D-gluconolactose.[4][5]

Referências

  1. ↑ a b IUPAC, Compêndio de Terminologia Química, 2ª ed. ("Gold Book"). Compilado por A. D. McNaught e A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Versão online: "aldonic acid"  (2006–) criado por M. Nic, J. Jirat, B. Kosata; atualizações compiladas por A. Jenkins. ISBN 0-9678550-9-8.
  2. ↑ IUPAC, Compêndio de Terminologia Química, 2ª ed. ("Gold Book"). Compilado por A. D. McNaught e A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Versão online: "uronic acids"  (2006–) criado por M. Nic, J. Jirat, B. Kosata; atualizações compiladas por A. Jenkins. ISBN 0-9678550-9-8.
  3. ↑ IUPAC, Compêndio de Terminologia Química, 2ª ed. ("Gold Book"). Compilado por A. D. McNaught e A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Versão online: "aldaric acids"  (2006–) criado por M. Nic, J. Jirat, B. Kosata; atualizações compiladas por A. Jenkins. ISBN 0-9678550-9-8.
  4. ↑ Robyt, J.F. (1998). Essentials of carbohydrate chemistry. New York: Springer. p. 366. ISBN 0387949518 
  5. ↑ «Cópia arquivada». Consultado em 18 de fevereiro de 2011. Arquivado do original em 14 de maio de 2011 

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