A method for preparing diphenol compounds includes adding a hydroxyphenyl carboxylic acid, a tyrosine ethyl ester, hydroxybenzotriazole hydrate and a solvent and stirring to produce a first solution. EDCI HCl is added to the first solution to produce a first mixture. Ethyl acetate is added to the first mixture to produce a second mixture. The second mixture is added to sodium chloride to produce a third mixture having layer separation. An aqueous layer is removed from the third mixture. The third mixture is extracted with reagents after the aqueous layer has been removed from the third mixture to produce a fourth mixture. Magnesium sulfate is added to the fourth mixture to produce a fifth mixture. The fifth mixture is filtered to produce filtrate. The filtrate is concentrated. Crystallization of the concentrated filtrate is induced. Methylene chloride is added to the crystallized filtrate to produce a solid product.
A method for preparing tyrosine derived polyarylates includes combining a desaminotyrosyl-tyrosine ethyl ester, a desaminotyrosyl-tyrosine benzylester, succinic acid and a catalyst in a flask to produce a first mixture. Methylene chloride is added to the first mixture to produce a first suspension. Diisopropylcarbodiimide (DIPC) is added to the first mixture to produce a first solution. The first solution is added to a non-solvent to produce a precipitate. The precipitate is dissolved in methylene chloride to form a polymer solution. The polymer solution is blended with a slurry to produce polymer shreds. The polymer shreds are blended with a second slurry to produce a tyrosine derived polyarylate.
POLYMERIC BIOMATERIALS DERIVED FROM PHENOLIC MONOMERS AND THEIR MEDICAL USES
申请人:Rutgers, The State University of New Jersey
公开号:EP3312155B1
公开(公告)日:2020-08-05
SYNTHESIS OF TYROSINE DERIVED POLYARYLATES
申请人:Medtronic, Inc.
公开号:EP3635029B1
公开(公告)日:2021-03-17
BIORESORBABLE SURFACE COATING FOR DELAYING DEGRADATION
申请人:Drei Lilien PVG GmbH & Co. KG
公开号:US20200171214A1
公开(公告)日:2020-06-04
The present invention relates to a biodegradable surface coating for inhibiting/delaying erosion/corrosion or degradation of solid materials for medical applications and their integration into cell assemblies.