摘要:
Disclosed herein is a novel process for preparing polymorphic Forms of (S)-6- chloro-(cyclopropylethynyl)-1,4-dihydro-4-(trifluoromethyl)-2H-3,1-benzoxazin-2- one referred as M1, I, II, ß, and ?.
摘要:
The present invention relates to process for the preparation of novel crystalline Desmethylvenlafaxine succinate polymorphic Forms- A, B. The present invention also relates to novel processes for the preparation of 0-Desmethylvenlafaxine succinate polymorphic Forms-(I), (II), (III) and amorphous.
摘要:
The present invention relates to an improved, process for large scale production of 1-[2-(dimethylamino)-1-(4-phenol)ethyl]cyclohexanol (O- desmethylvenlafaxine) or its pharmaceutically acceptable salts with increased yield and minimal impurities.
摘要:
Disclosed herein is an improved process for producing paliperidone, wherein the process includes hydrogenating 3-(2-chloroethyl)-2-methyl-9-(hydroxyprotected)-4H- pyrido[1.2-a] pyrimidin-4-one in presence of an acid and a catalyst under hydrogen pressure to give 3-(2-chloroethyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H- pyrido[l,2-a]-pyrimidin-4-one and condensing 3-(2-chloroethyl)-6,7,8,9-tetrahydro-9- hydroxy-2-methyl-4H-pyrido[l,2-a] -pyrimidin-4-one with 6-fluoro-3-(4-piperidinyl)- 1,2-benzisoxazole in presence of a base and a solvent to give paliperidone. In addition, the invention discloses novel polymorphic Forms VI and VII of paliperidone. Furthermore the invention discloses processes for producing the novel polymorphic forms and Form I from the novel polymorphic forms thereof.
摘要:
Disclosed herein is an improved process for producing paliperidone, wherein the process includes hydrogenating 3-(2-chloroethyl)-2-methyl-9-(hydroxyprotected)-4H- pyrido[1.2-a] pyrimidin-4-one in presence of an acid and a catalyst under hydrogen pressure to give 3-(2-chloroethyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H- pyrido[l,2-a]-pyrimidin-4-one and condensing 3-(2-chloroethyl)-6,7,8,9-tetrahydro-9- hydroxy-2-methyl-4H-pyrido[l,2-a] -pyrimidin-4-one with 6-fluoro-3-(4-piperidinyl)- 1,2-benzisoxazole in presence of a base and a solvent to give paliperidone. In addition, the invention discloses novel polymorphic Forms VI and VII of paliperidone. Furthermore the invention discloses processes for producing the novel polymorphic forms and Form I from the novel polymorphic forms thereof.
摘要:
A process for the purification of 7- (4-bromobutoxy)-3,4- dihydrocarbostyril, substantially free of dimer impurity, said process comprising providing a solution of crude 7- (4-bromobutoxy)-3,4- dihydrocarbostyril containing the dimer impurity in an organic solvent selected from the group of halogenated hydrocarbon solvent, aromatic hydrocarbon, alcohols, alkyl esters of C1-C4 alkanoic acids, ethers, diethyl ester and ketones ; converting to a salt by the addition of an inorganic acid; separation of 1,4-bis [3,4-dihydro-2 (1H)-quinolinone-7-oxy] butane salt (dimer impurity salt) from the mixture, based on the difference in at least one physical property of 7- (4-bromobutoxy)-3,4- dihydrocarbostyril salt and the salt of dimer impurity; liberating the 7- (4-bromobutoxy)-3,4- dihydrocarbostyril salt by treating with an inorganic base; precipitating 7- (4-bromobutoxy)-3,4- dihydrocarbostyril by adding an anti-solvent.
摘要:
Stable and sterile composition of cefepime and a process for preparing the same. Amorphous composition containing cefepime acid addition salt or solvates thereof and organic or inorganic base obtained by spray drying of their aqueous solution. The process comprises dissolving a composition containing mixture of cefepime acid addition salt and a pharmaceutically acceptable non-toxic organic or inorganic base in water to obtain aqueous solution, filtration of aqueous solution through 0.2 micron membrane filter and subjecting the clear aqueous solution to spray drying, or dissolving a cefepime acid addition salt in water, dissolving a pharmaceutically acceptable non-toxic organic or inorganic base in water, addition of solution from operation (v) to solution from operation (iv) at 0-30°C, preferably at 0-10°C to obtain a solution having a pH in the range of 3.0-7.0, filtration of aqueous solution through 0.2 micron membrane filter, and subjecting the clear aqueous solution to spray drying.
摘要:
A process for preparation of ziprasidone hydrochloride which is in amorphous form. The process comprises providing a ziprasidone hydrochloride solution in a mixture of alcoholic solvent and acetonitrile and spray drying the solution of ziprasidone hydrochloride.
摘要:
The present invention provides novel crystalline polymorphic forms of desloratadine designated as Form (A) and Form (B), wherein said forms are characterized by different solid state techniques such as powder X-ray diffraction, differential scanning calorimetry, thermo gravimetric analysis and moisture content. Further, this invention discloses processes for preparation of said polymorphic forms. In addition, novel processes for preparing Form (I) and Form (II) of desloratadine and mixtures thereof are also disclosed.