New catalytically oxidized polyglucosic units and methods of mak

Details New catalytically oxidized polyglucosic units and methods of mak New catalytically oxidized polyglucosic units and methods of mak

1988-04-26

1990-03-06

Kight, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 58, 536 63, 536 69, 536 74, 536101, 536102, 536103, 536122, C08B 1600, C08B 306, C08B 102, C08B 1505

Patent

active

049065793

ABSTRACT:
A method to selectively oxidize a polyglucose, on the oxygen of the hydroxy groups of the C-6 position of the glucose rings, while substantially maintaining the degree of polymerization of the polyglycosidic units, comprising heating a 6-sulfonyl polyglucose, for instance 6-O-para-(P)-toluene sulfonyl polyglucose with dimethyl sulfoxide (DMSO) in the presence of at least a catalytic amount of a catalyst selected from a member of the group consisting of: symmetrical--collidine, sodium bicarbonate and pyridine, to produce a polyglucose having aldehyde groups on the oxygen of the hydroxyl on the C-6 position of the glucose rings. In a preferred embodiment when pyridine is selected, this method enables use of that reaction to obtain other new products having other functional groups, mainly on the C-6 position of the glucose rings, without having to purify the aldehyde which may serve as intermediate.

REFERENCES:
patent: 4531000 (1985-07-01), Yalpani

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