Unsymmetrically substituted 1,4-dioxane-2,5-diones

Details Unsymmetrically substituted 1,4-dioxane-2,5-diones Unsymmetrically substituted 1,4-dioxane-2,5-diones

C - Chemistry, Metallurgy

08

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C08G 63/08 (2006.01) A61L 17/00 (2006.01) A61L 17/10 (2006.01) C07D 319/12 (2006.01)

Patent

CA 1052046

ABSTRACT Unsymmetrically 3,6-substituted 1,4-dioxane-2,5- -diones may be polymerized to give living-tissue absorbable, hydrolytically degradable surgically useful polymers. These polymers have predominantly regular rather than random spacings of side chains, may be stereoregular and tend toward higher cryatallinity than radomly sequenced polymers. A polymer of 3-methyl-1,4-dioxane-2,5-dione has the same empirical formula as an equimolecular copolymer of lactic and glycolic acid but has unique physical properties resulting from its more regu- lar steric configuration. Polymers and copolymers of 3- and 3,6-unsymmetrically substituted 1,4-dioxane-2,5-diones have surgically useful mechanical properties. On implantation, in living mammalian tissue, the polymers are absorbed, and re- placed by living tissue.

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