Polymethacrylate, preparation method and application thereof
A methacrylate and dimethylamino technology, applied in the application field of polymethacrylate in gene therapy, can solve the problem of unfavorable transport in vivo, damage to cell membrane structure, cell transfection and no research on terminal thiol oligomers. Cytotoxicity, etc.
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example 1
[0087] Example 1: Synthesis of 1,3,5-tris(2-(thiobenzenesulfonyl-2-propyl))benzene
[0088] In a 500ml round bottom flask, add 100ml carbon tetrachloride, 0.1mol1,3,5-triisopropylbenzene, 0.45mol N-bromosuccinimide (NBS), 20mg benzoyl peroxide catalyst, reflux After 48 hours, filter, wash with saturated sodium bicarbonate three times, dry over anhydrous magnesium sulfate, and distill off the solvent to obtain a yellow oily liquid with a yield of 85%. Add the yellow oily liquid to 100ml of chloroform solvent, add 0.45mol of thiobenzenesulfonyl magnesium bromide, reflux for 48h, separate by column chromatography, and distill off the solvent to obtain 1,3,5-tri(2-(thiobenzene Sulfonyl-2-propyl))benzene.
example 2
[0089] Example 2: Synthesis of 1,3,5-tris(2-(xanthogenyl-2-propyl))benzene
[0090] Add 100ml carbon tetrachloride, 0.1mol1,3,5-triisopropylbenzene, 0.45mol N-bromosuccinimide, 20mg benzoyl peroxide catalyst into a 500ml round bottom flask, reflux for 48h, filter, Wash with saturated sodium bicarbonate, dry over anhydrous magnesium sulfate, and distill off the solvent to obtain a yellow oily liquid with a yield of 80%. Add the yellow oily liquid to 100ml of chloroform solvent, add sodium ethyl xanthate, reflux for 48h, separate by column chromatography, and distill off the solvent to obtain 1,3,5-tris(2-(ethyl xanthate-2 -Propyl))benzene.
example 3
[0091] Example 3: Synthesis of TEX-PDMAEMA
[0092] In a 5ml round bottom flask, add DMAEMA (1g), azobisisobutyronitrile (4mg), 1,3,5-tris(2-(thiobenzenesulfonyl-2-propyl))benzene (80mg) and 2ml of tetrahydrofuran, fully deoxygenated, vacuum-sealed, and placed in a water bath at 60°C for 48 hours. The 1,3,5-terminal trisulfonate polymer—TEX-PDMAEMA was obtained, and excess hexane was added to precipitate and isolate the product. for polymer 1 H NMR characterization, D 4 -Methanol and D-chloroform as solvents.
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