Doxorubicin prodrug, its preparation method and injectable composition
A technology of doxorubicin and composition, applied in the field of doxorubicin prodrug and its injectable pH-sensitive hydrogel, can solve the problems of drug toxicity damage, increase patient pain, inability to distinguish, etc. The effect of long cleaning time and high safety
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[0046] The preparation method of the aforementioned adriamycin prodrug includes the following steps:
[0047] Dissolve MPEG-hydrazide and adriamycin in an anhydrous polar solvent, stir to complete the reaction, add excess triethylamine to continue the reaction to completion, and purify the adriamycin prodrug, named MPEG-DOX.
[0048] As a further improvement of the present invention, the MPEG-hydrazide synthesis method includes the following steps:
[0049] 1) Dissolve excess hydrazine sulfate salt in water and adjust its pH to alkaline to obtain reaction solution A;
[0050] 2) Add methoxypolyethylene glycol succinimide acetate into reaction solution A, stir the reaction to completion, dialyze to remove unreacted small molecules, and freeze-dry to obtain purified MPEG-hydrazide.
[0051] As a further improvement of the present invention, adding NaOH solution to adjust the pH of the hydrazine sulfate solution to 8.5~10. The molecular weight of the hydrazine sulfate salt is small and eas...
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