Synthetic process of vildagliptin

A synthesis technique and technique of the technique are applied in the field of synthesis technique of vildagliptin to achieve the effect of simple method

Inactive Publication Date: 2015-02-04
HAINAN ZHONGHE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Aiming at a series of problems existing in the existing reaction route, the present invention provides a new method for the preparation of vildagliptin

Method used

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  • Synthetic process of vildagliptin
  • Synthetic process of vildagliptin
  • Synthetic process of vildagliptin

Examples

Experimental program
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Effect test

Embodiment 1

[0081] Embodiment 1, the synthetic method of vildagliptin of the present invention

[0082] (1) (S)-2-cyanopyrrolidine

[0083] Add 2kg of N-fluorenylmethoxycarbonyl-prolinamide to a 50L three-neck reaction flask, add 20L of dichloromethane, stir evenly and cool the system down to -5~0℃, add 2LN,N-dimethylformamide, the system Control the temperature at 0-8°C, and add 1.87kg of trifluoroacetic anhydride dropwise. After the dropwise addition, continue to stir and react for 1.5-2.0 hours. At the same time, set the temperature to 25°C, and the system will heat up naturally. Liquid Phase Detection After the reaction, the system was cooled down to -5°C to 5°C, 8.0L of purified water was added dropwise to the system, allowed to stand for 15 minutes, separated, and the organic phase was washed with purified water (8.0L x 2 times). Transfer the organic phase to a 50L reaction kettle, add 12L of purified water, stir and cool down to 0-10°C, and add 2.0kg of solid sodium bicarbonate to...

Embodiment 2

[0091] Embodiment 2, the existing synthetic method of vildagliptin intermediate II

[0092] figure 2 The synthetic method of described vildagliptin intermediate II: 20g chloroacetyl chloride and 97g potassium carbonate are dissolved in 250mL tetrahydrofuran, mechanically stirred, dropwise add the L-proline amide (20g) solution that is dissolved in tetrahydrofuran (500mL), About 45min, after the dropwise addition, at room temperature, continue to stir the reaction for 2h, filter the reaction solution, remove the potassium salt, and then use Na 2 SO 4 Dry, filter out Na 2 SO 4 Finally, vildagliptin intermediate I was obtained; 25 mL of trifluoroacetic anhydride was added to the transparent filtrate, and magnetically stirred at room temperature for 1 h to obtain a yellow solution, and the excess trifluoroacetic anhydride was removed with ethyl acetate, and the oil was separated and taken The organic layer was washed with Mg 2 SO 4 Dry and filter to obtain intermediate II(s...

Embodiment 3

[0093] Embodiment 3, detection process of the present invention

[0094] The detection process of purity and impurity of vildagliptin final product vildagliptin described in the present invention:

[0095] Chromatographic conditions: use octadecylsilane bonded silica gel as filler (4.6×50μm), use phosphate buffer solution [take 1.3g of anhydrous potassium dihydrogen phosphate solution, put it in a 1000mL volumetric flask, add water to dissolve and dilute to the mark , shake well, adjust the pH to 6.50±0.50 with dipotassium hydrogen phosphate solution (take 1.5g of anhydrous dipotassium hydrogen phosphate, add 10mL of water to dissolve)-water-acetonitrile-methanol (400:600:15:15) as the flow Phase A, phosphate buffer-acetonitrile-methanol (400:450:150) was used as mobile phase B, and the gradient elution was performed according to the following table: the flow rate was 1.8mL / min, the column temperature was 35°C, and the detection wavelength was 210nm. Take vildagliptin referen...

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Abstract

The invention belongs to the field of drug synthesis and discloses a novel method for preparing vildagliptin. The process comprises the following steps: dehydrating N-fluorenylmethoxy carbony-L-prolinamide (raw material) to form nitrile; removing the Fmoc- protective group and carrying out N-chloracetylation to obtain an intermediate (S)-1-(chloracetyl)-2-cyan pyrrolidine; further carrying out condensation on the intermediate and 3-amino-1-adamantanol to obtain a coarse vildagliptin product; and recrystallizing to obtain a refined vildagliptin product. The process flow used for synthesizing vildagliptin is simple in method and low in impurity content, thereby facilitating industrial production of vildagliptin.

Description

technical field [0001] The invention belongs to the field of drug synthesis, and in particular relates to a synthesis process of vildagliptin. Background technique [0002] Vildagliptin (Vildagliptin) is an oral selective dipeptide-peptidase-4 (DPP-4) inhibitor developed by Novartis Pharmaceuticals. The Chinese chemical name is: (-)-(2S)-1-[ [(3-Hydroxytricyclo[3.3.1.1[3,7]decane-1-yl)amino]acetyl]pyrrolidine-2-carbonitrile, the English chemical name is: 1-[(3-Hydroxy-adamant -1-ylamino]-pyrrolidine-2(S)-carbonitrile. [0003] Vildagliptin, the structural formula is as follows: [0004] [0005] The chemical formula is: C 17 h 25 N 3 o 2 , Molecular weight: 303.40. [0006] On September 26, 2007, it was the first to be approved for marketing in Europe for the treatment of type II diabetes. (Chinese product name: Jiaweile). [0007] Vildagliptin can combine with DPP-4 to form a complex, quickly inhibit the activity of DPP-4, increase the level of endogenous gluca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D207/16
CPCY02P20/55C07D207/16
Inventor 崔学云杨平杨勇
Owner HAINAN ZHONGHE PHARM CO LTD
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