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Synthesis, analysis and reduction of 2-nitropropyl starch

Synthesis, analysis and reduction of 2-nitropropyl starch

Samenvatting

Granular 2-nitropropyl potato starch was synthesized by reaction with 2-nitropropyl acetate in an aqueous suspension. Nitroalkylation occurs preferentially with the amylose fraction of potato starch, as was confirmed by leaching experiments and digestion of the modified starch with α-amylase. The 2-nitropropyl substituent is a mixture of the nitroalkane and nitronic acid tautomer. Some grafting occurs and to a lesser extent additional reactions (formation of carbonyls and oximes) of the nitro group take place. After catalytic hydrogenation of water soluble 2-nitropropyl starch only a small amount of the nitro functionality was reduced to the corresponding amine. Reduction of granular 2-nitropropyl starch with sodium dithionite did not go to completion and led to a complex mixture of starting material, several intermediates and side products (for example sulfamates). © 2001 Elsevier Science Ltd.

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OrganisatieHanzehogeschool Groningen
LectoraatBiobased Ingredients and Materials
Gepubliceerd inCarbohydrate Research Elsevier, Vol. 330, Uitgave: 2, Pagina's: 191-204
Datum2001-01-30
TypeArtikel
ISSN0008-6215
DOI10.1016/S0008-6215(00)00288-3
TaalEngels

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