The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 2020
Filed:
May. 18, 2016
Chemi S.p.a., Cinisello Balsamo, IT;
Lorenzo De Ferra, Patrica, IT;
Ettore Ammirati, Patrica, IT;
Simona Andreassi, Patrica, IT;
Mauro Annibaldi, Patrica, IT;
Luca Mandelli, Patrica, IT;
Barbara Pinto, Patrica, IT;
Felice Stracqualursi, Patrica, IT;
Chemi S.P.A., Cinisello Balsamo, IT;
Abstract
The present invention relates to a process for the preparation of a polysaccharide composed of D-xylose units of formula (III) linked together via beta 1,4 glycosidic bonds wherein Ris hydrogen or acetyl, Ris hydrogen, acetyl or a 4-O-methyl glucuronic acid unit, wherein, when Ris a 4-O-methyl glucuronic acid unit, the Rgroup on the same saccharide unit is defined as G, wherein G is hydrogen or acetyl, and wherein the sugar unit at the reducing end of sun such polysaccharide is xylose, lyxose or xylulose, said process comprising the following steps: selective deacetylation of xylan extracted from beech wood; and isomerization of the selectively deacetylated xylan achieved in step or the following steps: isomerization of xylan extracted from beech wood; and selective deacetylation of isomerized xylan achieved in step. The process is useful for the preparation of pentosan polysulfate or pharmaceutically acceptable salts thereof for pharmaceutical use.