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Synthesis of sucrose-based surfactants through regioselective sulfonation of acylsucrose and the nucleophilic opening of a sucrose cyclic sulfate

Synthesis of sucrose-based surfactants through regioselective sulfonation of acylsucrose and the nucleophilic opening of a sucrose cyclic sulfate

Carbohydrate Research 309(2): 189-205

ISSN/ISBN: 0008-6215

DOI: 10.1016/s0008-6215(98)00121-9

Synthesis of a new class of anionic and amphoteric sucrose-based surfactants is described. Direct sulfonation of 6-O-acylsucrose using the pyridine-sulfur trioxide complex led to a mixture of the regioisomeric monosulfates, 6-O-acyl-4'-O-sulfosucrose and 6-O-acyl-1'-O-sulfosucrose, while sulfonation of 1'-O-acylsucrose afforded a mixture of 1'-O-acyl-6'-O-sulfosucrose and 1'-O-acyl-6-O-sulfosucrose. The ratio of regioisomers ranged from 4.7: 1.0 to 7.5: 1.0, depending on reaction time and the size of the fatty acyl chain. The regiospecific synthesis of 6-O-acyl-4-O-sulfosucrose derivatives was accomplished by nucleophilic substitution of the sucrose 4,6-cyclic sulfate using various fatty acids. The amphoteric 6-alkylamino-6-deoxy-4-O-sulfosucrose surfactants were also synthesized by nucleophilic substitution of the sucrose cyclic sulfate by different fatty amines. All the newly synthesized sucrose-based surfactants displayed excellent surface-active properties.

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Accession: 003291933

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