Acrylic Acid → N-propan-2-ylprop-2-enamide;prop-2-enoic acid

Participants

Reaction Conditions

Reaction Steps

Sodium dodecylsulfate (20 mg), N-isopropylacrylamide (2.7 g), acrylic acid (172 mg), and methylenebisacrylamide (121 mg) are dissolved in 200 ml of water, and, after a 30 minute stirring at 70° C. in a nitrogen atmosphere, a polymerization initiator (potassium persulfate 9.2 mg) is added, followed by 4 hours of stirring. The obtained particles (precursor of Example 1-2) are purified in water by means of dialysis, and then lyophilized. These particles are then dispersed in tetrahydrofuran (30 ml)/dimethylformamide (10 ml), and a tetrahydrofuran (10 ml)/dimethylformamide (50 ml) solution of dicyclohexylcarbodiimide (800 mg), hydroxybenzotriazole (500 mg), and 2,2′-(ethylenedioxy)bis(ethylamine) (1.14 g) is added at room temperature, followed by an overnight stirring. The particles are then dialyzed and lyophilized. Next, they are dispersed in methanol (70 ml), to which 1 g of the chemical compound of Synthetic example 1 is added, followed by a 6 hour stirring at room temperature; this mixture is cooled in an ice bath, 2.8 g of sodium cyanotrihydroborate is added, followed by an overnight stirring at room temperature. The obtained particles are dialyzed in water to obtain the target N-isopropylacrylamide/acrylic acid copolymer particles (620 mg) having phosphorylcholine groups directly on the particle surface.

Provenance & Evidence