Targeting triblock copolymer containing morpholine-2,5-dione derivative copolymer, preparation method and application
A technology of copolymers and derivatives, applied in the field of targeted triblock copolymers and preparation, achieves the effects of low cytotoxicity, high transfection rate and improved stability
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Embodiment 1
[0054] A method for preparing a targeted tri-block copolymer containing morpholine-2,5-dione derivative copolymer, comprising the steps of:
[0055] (1) take morpholine-2,5-diketone derivative monomer and L-lactide according to the ratio of 20:80 according to the molar ratio, add initiator and stannous octoate catalyst, under the condition of isolated air, React at 150°C for 1h, then react at 120°C for 48h to obtain the mixture; the amount of stannous octoate added is 2% of the sum of the mass of morpholine-2,5-dione derivative monomer and L-lactide; The agent is 1,8-octanediol, and the addition amount of 1,8-octanediol is 7% of the sum of the mass of morpholine-2,5-dione derivative monomer and L-lactide.
[0056] The structure of morpholine-2,5-diketone derivative monomer is formula (I-a):
[0057]
[0058] (2) Dissolve 25g of the mixture obtained in step (1) in 50mL dimethyl sulfoxide to make a solution, add 150mL of anhydrous ether, separate, remove unreacted monomers, ...
Embodiment 2
[0063] A method for preparing a targeted tri-block copolymer containing morpholine-2,5-dione derivative copolymer, comprising the steps of:
[0064] (1) Take by weighing morpholine-2,5-dione derivative monomer and D-lactide in the ratio of 10:90 by molar ratio, add initiator and tin octoate, under the condition of isolated air, at 140 After reacting at 100°C for 2 hours, and then reacting at 100°C for 72 hours, the mixture was obtained; the amount of tin octoate added was 0.001% of the sum of the mass of morpholine-2,5-dione derivative monomer and D-lactide; the initiator was 1,9-nonanediol, the amount of 1,9-nonanediol is 8% of the sum of the mass of morpholine-2,5-dione derivative monomer and D-lactide;
[0065] The structure of morpholine-2,5-diketone derivative monomer is formula (I):
[0066] where R 1 :-H;R 2 :-CH(CH 3 )-CH 2 -CH 3 ;
[0067] (2) 5g of the mixture obtained in step (1) was dissolved in 10mL of chloroform to make a solution, added 50mL of anhydrous et...
Embodiment 3
[0072] A method for preparing a targeted tri-block copolymer containing morpholine-2,5-dione derivative copolymer, comprising the steps of:
[0073] (1) Take morpholine-2,5-diketone derivative monomer and D,L-lactide in the ratio of 25:75 by molar ratio, add initiator and dibutyltin oxide, in the isolated air Under the conditions, react at 155°C for 0.5h, then react at 130°C for 12h to obtain a mixture; the amount of dibutyltin oxide added is morpholine-2,5-dione derivative monomer and D,L-lact 5% of the sum of ester mass; the initiator is 1,10-decanediol, and the mass of 1,10-decanediol is the mass of morpholine-2,5-dione derivative monomer and D,L-lactide 0.16% of the sum;
[0074] The structure of morpholine-2,5-diketone derivative monomer is formula (I):
[0075] where R 1 :-CH 3 ; 2 :-CH 2 C(CH 3 ) 2 ;
[0076] (2) 25g of the mixture obtained in step (1) was dissolved in 50mL of dichloromethane to make a solution, added 150mL of n-hexane, separated, removed unrea...
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