37 results about "Lercanidipine Hydrochloride" patented technology

The invention describes novel lercanidipine crude Forms (A) and (B), novel lercanidipine hydrochloride crystalline Forms (I) and (II) obtained from said crude Forms, pharmaceutical, antihypertensive compositions containing as active agent at least one of the lercanidipine hydrochloride crystalline Forms (I) and (II) and methods of use thereof.

The invention is directed to novel crude forms and crystalline forms of lercanidipine hydrochloride, and to processes for the preparation of these forms. Pharmaceutical compositions comprising the novel crystalline forms also are contemplated.

The invention provides a substantially pure amorphous lercanidipine hydrochloride having a purity of at least 95% pure, preferably at least about 97% pure, more preferably at least about 99% pure, and still more preferably at least about 99.5% pure. The invention further relates to methods of preparing substantially pure amorphous lercanidipine, as well as methods of providing rapid relief from hypertension by administering the substantially pure amorphous lercanidipine hydrochloride of the present invention to a patient in need of such treatment.

The invention is a lercandipine hydrochloride crystal (form (HX) crystal) and the preparation method. The crystal has no crystalline water and virgule or crystalline solvent, and is a novel high-purity stable crystalline form, which is more suitable for the large-scale industrial production. The invention is characterized in the simple and easy operation; thus the invention is conducive to the preparation of the drug combination and the clinical use. The crystal uses the Cu-K alpha radiation; the X-ray powder diffraction spectra show expressed in the 2-theta angle has the following characteristics (see the above formula).

The invention relates to a preparation method of lercanidipine. The preparation method comprises the following steps of dissolving 2,6-dimethyl-5-methoxycarbonyl-4-(3-nitrophenyl)-1,4-dihydropyridyl-3-carboxylic acid in waterless dichloromethane and waterless dimethylformamide, dropwisely adding thionyl chloride into the solution under control of a temperature in a range of -4 to 1 DEG C, then carrying out stirring for 1h, dropwisely adding an anhydrous methylene chloride solution of 2,N-dimethyl-N-(3,3-dibenzylpropyl)-1-amino-2-ol into the mixed solution at a temperature of -10 to 0 DEG C, then carrying out stirring at a temperature of 0 DEG C for 3h, standing the mixture at a room temperature for 18-20h, carrying out washing orderly by saturated salt water, a sodium carbonate solution with a concentration of 10%, saturated salt water, hydrochloric acid with content of 1mol / L and saturated salt water, adding lercanidipine hydrochloride seed crystals into the washed product, carrying out standing at a temperature of 0-5 DEG C for 1d, carrying out filtration and carrying out anhydrous ethanol re-crystallization to obtain lercanidipine hydrochloride. The preparation method of lercanidipine has the advantages of simple preparation processes, high yield and low cost.

The invention relates to the field of medicines and discloses a compound preparation of lercanidipine hydrochloride and atorvastatin calcium. The unit preparation comprises 5-20 mg of lercanidipine hydrochloride and 10-80 mg of atorvastatin calcium. The invention further provides another compound preparation which is prepared to tablets by taking lercanidipine hydrochloride and atorvastatin calcium as the main medicine, taking calcium carbonate, microcrystalline cellulose, sodium salt of carboxy methyl-cellulose, hydroxy propyl cellulose, polysorbate 80, magnesium stearate, amylum pregelatinisatum and colloidal silicon dioxide as auxiliary materials, and taking opadry as the coating. Clinical tests show that the compound preparation of lercanidipine and atorvastatin calcium plays a significant role in reducing pressure and fat, medicinal dose is reduced, incidence of untoward effects is reduced, toleration and medication compliance of patients are good, and the compound preparation has a good clinical application prospect.

The invention discloses lercanidipine hydrochloride tablets. The lercanidipine hydrochloride tablets comprise lercanidipine hydrochloride, lactose, microcrystalline cellulose, carboxymethyl starch sodium, 5% povidone K30 solution and magnesium stearate, wherein the weight ratio of the lercanidipine hydrochloride, lactose, microcrystalline cellulose, carboxymethyl starch sodium, 5% povidone K30 solution and magnesium stearate is 10:70-75:29-33:8-12:0.8-1.2:0.7-3. The invention further provides a preparation method of the lercanidipine hydrochloride tablets. The method includes: the lercanidipine hydrochloride is mixed with the lactose and the like in an equal-quantity increasing manner and then evenly mixed with other auxiliary materials. The lercanidipine hydrochloride tablets have the advantages that the raw materials and auxiliary materials are evenly mixed, the tablets are even in lercanidipine hydrochloride content and high in dissolution rate, in vivo absorption is benefited, and the bioavailability of the tablets is increased.

The invention provides a novel crystal form of lercanidipine hydrochloride, which has peaks at 5.38 DEG, 10.74 DEG, 11.54 DEG, 11.88 DEG, 15.14 DEG, 17.26 DEG, 17.92 DEG, 19.82 DEG, 20.22 DEG, 20.70 DEG, 21.44 DEG, 21.98 DEG and 22.56 DEG expressed by a 2theta angle in an X ray diffraction pattern. The novel crystal form has high purity (over 99.5 percent) and high stability, has low rigidity and is easy to crush after being dried, and facilitates preparing and using a medicinal composition. The invention also provides a preparation method for the crystal form and a crystal form-containing medicinal composition. Compared with the prior art, the preparation method has the advantages of simple process, mild preparation conditions and high yield.

The invention provides a pharmaceutical composition for treating hypertension. The invention relates to a pharmaceutical composition comprising therapeutic doses of lercanidipine hydrochloride and enalapril maleate, and a proper amount of oil, a surfactant and an assisted surfactant. Preparative dosage forms particularly hard capsules and soft capsules are provided. The pharmaceutical composition increases solubility of a poorly soluble drug of lercanidipine hydrochloride and stability of enalapril maleate, and is suitable for the treatment of hypertension.

The invention relates to an HPLC (High Performance Liquid Chromatography) method for determining the dissolution rate of a Lercanidipine hydrochloride tablet. The method comprises the following steps: (1) test of the dissolution rate of the Lercanidipine hydrochloride tablet and preparation of a sample solution; (2) preparation of a reference solution of Lercanidipine hydrochloride; (3) HPLC determination, to be specific, performing determination analysis on the reference solution and the sample solution under the following chromatographic conditions: a chromatographic column is Waters SunFire C18 (4.6 mm*150 mm, 5 [mu]m), a flowing phase is formed by a 0.15 mol.L<-1> sodium perchlorate solution (of which the pH is adjusted by a 70% perchloric acid to be 3.0-4.0) and acetonitrile, the ratio of the sodium perchlorate solution to the acetonitrile is 40:60, the column temperature is 25-30 DEG C, the detection wavelength is 240 nm, the flow speed is 1.0 ml.min<-1>, and the sample injection amount is 40 [mu]L. A methodological test shows that the method is high in specificity, accurate in result, good in stability, simple and convenient to operate, and suitable for the determination of the dissolution rate of the Lercanidipine hydrochloride tablet, and can control the quality of the Lercanidipine hydrochloride tablet more scientifically and effectively.

The invention discloses a sustained release medicinal preparation containing lercanidipine hydrochloride, which consists of an effective dose of lercanidipine hydrochloride and pharmaceutically acceptable pharmaceutic adjuvant. The lercanidipine hydrochloride sustained release medicinal preparation prepared can enable the medicament constantly and stably to release in vivo, ensures a steady plasmalevel, and radically improves the safety and effectiveness of the medicament.

The invention provides a novel process for the preparation of lercanidipine or a pharmaceutical acceptable salt using novel intermediates. Thus, 2,N-dimethyl-N-(3,3-diphenylpropyl)-1-amino-2-propanol is reacted with trimethylsilyl chloride in presence of triethyl amine in methylene chloride to give 2,N-dimethyl-2-(trimethylsilyloxy)-N-(3,3-diphenylpropyl)-1-propanamine, which is then reacted with 2,6-dimethyl-5-methoxycarbonyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3-carbonyl chloride for 2 hours and crystallized to obtain lercanidipine hydrochloride.

The invention provides amorphous lercanidipine hydrochloride and a preparation method thereof. Lercanidipine hydrochloride is a third-generation dihydropyridine calcium antagonist and is mainly used for hypertension and angina in clinic. The invention provides amorphous lercanidipine hydrochloride with the purity being at least 98.5%, particularly at least 99.5% and more particularly at least 99.7%. The invention also provides a preparation method of high-purity amorphous lercanidipine hydrochloride.

The invention provides a novel crystal form of lercanidipine hydrochloride, which has peaks at 5.38 DEG, 10.74 DEG, 11.54 DEG, 11.88 DEG, 15.14 DEG, 17.26 DEG, 17.92 DEG, 19.82 DEG, 20.22 DEG, 20.70 DEG, 21.44 DEG, 21.98 DEG and 22.56 DEG expressed by a 2theta angle in an X ray diffraction pattern. The novel crystal form has high purity (over 99.5 percent) and high stability, has low rigidity and is easy to crush after being dried, and facilitates preparing and using a medicinal composition. The invention also provides a preparation method for the crystal form and a crystal form-containing medicinal composition. Compared with the prior art, the preparation method has the advantages of simple process, mild preparation conditions and high yield.

The present invention relates to a pharmaceutical composition comprising lercanidipine hydrochloride and valsartan as active components and a method for the preparation thereof. The pharmaceutical composition comprising lercanidipine hydrochloride and valsartan according to the present invention has a superior effect on the prevention and treatment of cardiovascular diseases and their complex diseases, and reduces the adverse effects of each component. In addition, the present composition comprises lercanidipine hydrochloride and valsartan in a separated form so as to increase the dissolution rates of both components and reduce the adverse effects.

Processes for the purification of lercanidipine hydrochloride are provided which uses a binary system of an alcohol-containing solvent such as methanol and an aliphatic ester-containing solvent such as isopropyl acetate. Processes for the preparation of substantially amorphous lercanidipine hydrochloride are also provided. Also provided is lercanidipine hydrochloride substantially in polymorph form V.

The invention discloses a refinement method of lercanidipine hydrochloride, which comprises the following steps: dissolving a lercanidipine hydrochloride crude product in mixed organic solvent of C1-3 alkyl alcohol and C1-3 alkyl acetate, wherein the volume mass ratio of the mixed organic solvent is 2-6 times, preferably 3-4 times; heating to 0-40 DEG C, and stirring, wherein the preferable temperature is 30-35 DEG C; soaking and washing for 2 hours, and cooling to 0-25 DEG C, preferably 18-25 DEG C; and continuing stirring the obtained solution for 6 hours, filtering the precipitated solid, washing the filter cake with absolute ethanol to obtain a yellow solid, and carrying out forced air drying to obtain the high-purity lercanidipine hydrochloride. The method further refines the lercanidipine hydrochloride crude product, is simple and convenient for operation, has the advantages of high purification rate, high speed, high stability in the whole operation, short refinement period, high yield and cost saving, and finally obtains the high-purity lercanidipine hydrochloride.

Disclosed herein is an improved, commercially viable and industrially advantageous process for the preparation of substantially pure Lercanidipine intermediate, 1,1,N-trimethyl-N-(3,3-diphenylpropyl)-2-aminoethyl acetoacetate. The intermediate is useful for preparing Lercanidipine, or a pharmaceutically acceptable salt thereof, in high yield and purity. The present invention further provides a novel crystalline form of Lercanidipine hydrochloride and a process for its preparation. The present invention also provides a process for the preparation of amorphous form of Lercanidipine hydrochloride.