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Preparation method of podophyllinic acid lactone derivant

A technology of podophyllotoxin and derivatives, which is applied in the field of preparation of water-soluble podophyllotoxin derivatives, can solve the problems that the preparation method has not been reported, and achieve the effects of simplifying the post-processing process, increasing the reaction yield, and optimizing the reaction conditions

Inactive Publication Date: 2011-09-14
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are reports on podophyllotoxin derivatives in the Chinese patent literature library, but there are no reports on podophyllotoxin derivatives modified by polyethylene glycol and their preparation methods

Method used

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  • Preparation method of podophyllinic acid lactone derivant
  • Preparation method of podophyllinic acid lactone derivant
  • Preparation method of podophyllinic acid lactone derivant

Examples

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preparation example Construction

[0022] The preparation route of the present invention is:

[0023] Put podophyllotoxin and carboxy monomethoxypolyethylene glycol in a reaction container, add dicyclohexylcarbodiimide and dimethylaminopyridine to mix the reactants evenly, and react under microwave catalysis for 30 minutes, that is Podophyllotoxin prodrugs can be obtained.

Embodiment 1

[0025] In a 25ml Erlenmeyer flask, add 1.00g (0.5mmol) mPEG-COOH 2000, 0.31g (0.75mmol) podophyllotoxin, 0.21g (1.0mmol) dicyclohexylcarbodiimide and 0.12g (1.0mmol) -N,N-Dimethylaminopyridine, shake well to mix the reactants evenly, then place in a Whirlpool microwave oven, and heat for 30min at a power of 510W until no more water droplets are formed. After the reacted mixture was dried and cooled in a vacuum oven, 40ml of anhydrous dichloromethane was added, shaken thoroughly, filtered, and part of the dichloromethane was evaporated from the filtrate, then 80ml of anhydrous diethyl ether was added to precipitate a white precipitate. The above sample was cooled in a refrigerator at 4-10°C, filtered with suction, and dried to obtain a white solid weighing 1.22 g.

[0026] Add 40ml of dichloromethane to the above crude product to dissolve it, then add 20ml of 10% AcOH / THF to decompose excess dicyclohexylcarbodiimide, wash with 20ml of 0.1N hydrochloric acid solution after 10min...

Embodiment 2

[0028] In a 25ml Erlenmeyer flask, add 2.50g (0.5mmol) mPEG-COOH 5000, 0.31g (0.75mmol) podophyllotoxin, 0.21g (1.0mmol) dicyclohexylcarbodiimide and 0.12g (1.0mmol) -N,N-Dimethylaminopyridine, shake well to mix the reactants evenly, then place in a Whirlpool microwave oven, and heat for 30min at a power of 510W until no more water droplets are formed. After the reacted mixture was dried and cooled in a vacuum oven, 40ml of anhydrous dichloromethane was added, shaken thoroughly, filtered, and part of the dichloromethane was evaporated from the filtrate, then 80ml of anhydrous diethyl ether was added to precipitate a white precipitate. The above sample was cooled in a refrigerator at 4-10°C, filtered with suction, and dried to obtain a white solid weighing 2.66 g.

[0029] In the above crude product, add 40ml of dichloromethane to dissolve, add 20ml of 10% AcOH / THF to decompose excess dicyclohexylcarbodiimide, wash with 20ml of 0.1N hydrochloric acid solution after 10min, add a...

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Abstract

The invention provides a derivative for podophyllotoxin. The derivative is characterized in that the derivative is a carboxyl single methoxypolyethylene glycol derivative of podophyllotoxin with the following structural formula. The preparation method comprises the following the steps that: the podophyllotoxin, the carboxyl single methoxypolyethylene glycol, dicyclohexyl imine and N dimethylaminopyridine are used as raw materials to prepare the polyethylene glycol derivative of the podophyllotoxin by the microwave catalytic action. The podophyllotoxin prodrug of the derivative is good in solubility and high in stability. The preparation of the derivative has the characteristics of high efficiency, rapidness, simpleness and convenience and high reaction yield.

Description

technical field [0001] The invention relates to a method for preparing water-soluble podophyllotoxin derivatives, which are polyethylene glycol modified podophyllotoxin derivatives. Background technique [0002] Podophyllotoxin is a natural compound with anti-tumor activity. It has strong cytotoxicity, but due to its serious toxicity, it cannot be used in clinical practice. Its structure needs to be modified. Pharmacists have synthesized a large number of Podophyllotoxin derivatives, and a structure-activity relationship study was carried out. Such as: etoposide, teniposide and other podophyllotoxin derivatives have been developed into anti-tumor drugs for clinical application. Modification of podophyllotoxin with polymer compounds is another important method to reduce the side effects of podophyllotoxin. Lignin, polyethylene glycol and its derivatives are all used as modifiers of podophyllotoxin. [0003] There are reports on podophyllotoxin derivatives in the Chinese pat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K47/48A61K31/365A61P35/00C07D493/04A61K47/60
Inventor 张剑锋侯琳熙
Owner NINGBO UNIV
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