US 7,396,923 B2Granted

Method for the sulfonation of compounds comprising free hydroxyl (OH) groups or primary or secondary amines

AssigneeOrganes, Tissues : Regeneration, Reparation, Remplacement- OTR3

InventorsEmmanuel Petit, Dulce Garcia-Papy, Véronique Barbier-Chassefiere

Life of this patent

Estimating the term…

Abstract

A method for sulfonating compounds having one or more free hydroxyl functional groups and/or one or more optionally substituted primary or secondary functional groups, including treating the compounds with a complex of SO3-DMF in the presence of an acid capture agent.

Claims3

Dependent claims

A method for sulfonating polysaccharide compounds comprising treating the polysaccharide compounds with SO3-DMF in the presence of an acid capture agent.

Dependencies are inferred from the claim text.

Facts

Application: 10/853,323Filed 25 May 2004 · continuation
Priority: FR 01 1544429 Nov 2001
Published: US 2004/0242801 A12 Dec 2004
Granted: 8 Jul 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

C07C 303/24
Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides: of esters of…
C07B 45/02
Formation or introduction of functional groups containing sulfur: of sulfo or sulfonyldioxy groups
C08B 37/00
Preparation of polysaccharides not provided for in groups c08b1/00 - c08b35/00
C08B 37/0021
Alpha-D-Glucans, e.g. polydextrose, alternan, glycogen; -D-Glucans; -D-Glucans, e.g. isolichenan or nigeran; -D-Glucans; -D-Glucans, e.g.…:…

Family

PCT/FR02/04095Parent of this continuation · filed 28 Nov 2002
US 2004/0242801 A1Pre-grant publication · published 2 Dec 2004
US 7,396,923 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

patentgrep

Loading patent…

patentgrepSearch patents

Back to results