Saccharide mercaptals
AssigneeImperial Chemical Industries PLC
InventorsTrevor Johnson, Robert A. C. Rennie
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Abstract
Process for the preparation of a mercaptal of an oligosaccharide which process comprises the step of reacting the oligosaccharide with a thiol in the presence of an aqueous halocarboxylic or halosulphonic acid.
Claims10
A process for the preparation of a mercaptal of an oligosaccharide which process comprises the step of reacting the oligosaccharide with a thiol in the presence of a halocarboxylic or halosulphonic acid wherein the halocarboxylic acid or halosulphonic acid is neat acid or provides more than 50% v/v of an aqueous reaction mixture.
A mercaptal of a disaccharide of the formula ##STR4## wherein each R.sup.1, which may be the same or different, is a methyl, butyl, hexyl or octyl group, a substituted hydrocarbyl group or together form a ring structure with the --S--CHR.sup.2 --S-- moiety;
- and
- the moiety R.sup.2 --CH-- is derived from lactose, maltose or cellobiose.
Dependencies are inferred from the claim text.