Alkylene-dicarboxylate-containing biodegradable poly(ester-amides) and methods of use
申请人:Katsarava Ramaz
公开号:US08445627B2
公开(公告)日:2013-05-21
The invention provides new aliphatic diester-di-acid-containing PEA polymer compositions with significant improvement in hydrolytic degradation rates as compared to aliphatic di-acid-containing PEA polymers. The di-acids used in the invention PEA compositions include non-toxic fatty aliphatic homologs. These molecules inherently contain two-ester groups, which easily can be cleaved by biotic (enzymatic) and abiotic hydrolysis. Additional di-acid-type compounds useful for active polycondensation are α,ω-alkylene dicarboxylates composed of short aliphatic non toxic diols and di-acids. In addition, the invention PEA polymer compositions optionally can include a second monomer, such as a C-protected L-lysine-based monomer, to introduce additional chain flexibility into the polymer. The invention PEA polymer compositions are useful for delivery of bioactive agents when administered internally.
Synthesis of Macrocyclic Dilactones through Lipases
作者:Mª Pilar Bosch、Angel Guerrero
DOI:10.1055/s-2005-917099
日期:——
We report herein a selective and efficient method to prepare macrocyclic dilactones in good yields from diols and succinicanhydride through a biocatalytic condensation reaction.
The present invention is directed to bioabsorbable adhesive/hemostatic formulations of a 2-alkoxyalkylcyanoacrylate and liquid or solid polymeric modifiers and adjuvant. The present adhesive formulations are useful as tissue adhesive/sealants, hemostatic agents, and as a means for patching or anastomic coupling of damaged organs.