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US 5,614,616 AGranted
Process for the production of polysaccharides
AssigneeWolff Walsrode AG
InventorsHans-Josef Buysch, Klaus Szablikowski, J orn Breckwoldt
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Abstract
Polysaccharides corresponding to formula (I) ##STR1## in which S is a recurrent monosaccharide unit and B is a group of formula (Ia) attached to the monosaccharide unit S by an O atom ##STR2## are prepared by reaction of polysaccharides with an alkyl halide corresponding to formula (II) ##STR3##
Claims7
A process for the production of polysaccharides corresponding to recurrent formula (I) ##STR13## comprising reacting of polysaccharides with an alkyl halide corresponding to formula (II) ##STR14## in which S is a monosaccharide unit and
- B is a group of formula (Ia) attached to the monosaccharide unit S by an O atom ##STR15## n=an integer of 1 to 6, R.sup.1 =H, C.sub.1-4 alkyl,
- R.sup.2 =an alkylene radical which may interrupted by an O or N atom,
- R.sup.3,R.sup.4 =an alkyl, aralkyl or aryl radical, an alkyl radical which may be interrupted by a heteroatom,
- m=a number of 0.05 to 3.0,
- R.sup.5 =an alkyl radical optionally containing an olefinic double bond or an O atom or an aralkyl radical,
- Y=Cl, Br,
- X.sup..crclbar. =an anion or
- R.sup.3 and R.sup.4 together with the common N atom form a ring optionally containing another heteroatom.
5 more elements
Dependencies are inferred from the claim text.