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Bilastine crystal and preparation method thereof

A crystal form, benzodiimazole technology, applied in the field of medicine, achieves good stability and is not easy to crystallize.

Inactive Publication Date: 2013-07-24
BEIJING VENTUREPHARM BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent only gives the crystal form The unit cell data and infrared data, the crystallization solvent used is isopropanol, n-butanol, acetone, DMF, DMSO, THF, acetonitrile or their mixture

Method used

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  • Bilastine crystal and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0016] 1.0 g of 4-[2-[1-(2-ethoxyethyl)-1H-benzodiimazol-2-yl]-1-piperidinyl]ethyl]-α,α-dimethyl Phenylacetic acid was added to 8ml of methanol, heated to dissolve, refluxed for one hour, naturally cooled and crystallized, filtered, and dried in vacuum at 50°C for 10 hours to obtain 0.72 grams of 4-[2-[1-(2-ethoxyethyl) -1H-Benzodeimazol-2-yl]-1-piperidinyl]ethyl]-α,α-Dimethylphenylacetic acid new crystal form, the yield is 72%, and the measured melting point is 197-200°C .

Embodiment 2

[0018] 2.0 g of 4-[2-[1-(2-ethoxyethyl)-1H-benzodiimazol-2-yl]-1-piperidinyl]ethyl]-α,α-dimethyl Add phenylacetic acid to 16ml of toluene, heat to dissolve, keep the temperature at about 70°C, keep it warm for one hour, cool and crystallize naturally, filter, and dry in vacuum at 50°C for 10 hours to obtain 1.5 grams of 4-[2-[1-(2 -Ethoxyethyl)-1H-benzodiimazol-2-yl]-1-piperidinyl]ethyl]-α,α-Dimethylphenylacetic acid new crystal form, yield 75%, measured The melting point is 197.5-200.2°C.

Embodiment 3

[0020] 1.5 g of 4-[2-[1-(2-ethoxyethyl)-1H-benzodiimazol-2-yl]-1-piperidinyl]ethyl]-α,α-dimethyl Add phenylacetic acid to 14ml of ethyl acetate, heat to dissolve, keep the temperature at about 65°C, keep it warm for one hour, cool and crystallize naturally, filter, and dry in vacuum at 50°C for 10 hours to obtain 1.0 g of 4-[2-[1- New crystal form of (2-ethoxyethyl)-1H-benzodiimazol-2-yl]-1-piperidinyl]ethyl]-α,α-dimethylphenylacetic acid, yield 66.7% , and the measured melting point is 197.5-199.8°C.

[0021] attached figure 1 X-powder diffraction pattern of bilastine crystal form

[0022] degree 2θ d-spacing Relative Strength(%) 9.2717 9.54 69.73 10.9004 8.11 35.37 12.7461 6.94 53.88 15.6617 5.65 45.34 17.6890 5.01 100.00 18.3202 4.84 64.71 20.0376 4.43 77.25 21.9021 4.05 52.89 27.3518 3.26 26.65

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Abstract

The invention belongs to the technical field of medicines, and particularly relates to 4-[2-[1-(2-ethoxy ethyl)-1H-benzodimazole-2-based]-1-piperidyl] ethyl]-alpha, alpha-methyl phenylpropionic acid (bilastine) crystal and a preparation method thereof. According to the method, bilastine is added into an organic solvent, heated to dissolve and then cooled to crystallize to obtain the bilastine crystal.

Description

technical field [0001] The invention belongs to the technical field of medicine and relates to a kind of 4-[2-[1-(2-ethoxyethyl)-1H-benzodiimazol-2-yl]-1-piperidinyl]ethyl] -α,α-Dimethylphenylacetic acid (bilastine) crystal form and preparation method. Background technique [0002] Bilastine, chemical name 4-[2-[1-(2-ethoxyethyl)-1H-benzodiimazol-2-yl]-1-piperidinyl]ethyl]-α, α-Dimethylphenylacetic acid, whose structure is shown in the following formula, is a kind of H 1 Receptor antagonists, not only for H 1 Receptor has antagonistic effect, and also inhibits the release of histamine and L-4 from inflammatory mediators, so it does not have the sedative effect and cardiotoxicity of commonly used antihistamines, and is mainly used clinically for the treatment of allergic rhinitis and chronic idiopathic rhinitis hives. First launched in Ireland in 2011. [0003] [0004] In US Patent No. 5877187, the preparation method of bilastine was first mentioned, but the patent ...

Claims

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Application Information

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IPC IPC(8): C07D401/04A61K31/454A61P37/08A61P11/02A61P17/00
Inventor 侯艳超马苏峰闫起强
Owner BEIJING VENTUREPHARM BIOTECH
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