摘要:
The present invention discloses a process for the preparation of quetiapine, which comprises the reaction of dibenzo[b,f][1,4]thiazepin-11-ylamine with a compound of the general formula (II) as well as novel intermediates in the process.
摘要:
The invention relates to a method for the preparation of 11- (4- [2- (2- hydroxyethoxy) ethyl] -1-piperazinyl] dibenzo [b, f ] -1, 4-thiazepine and pharmaceutically acceptable salts thereof comprising the reaction of 1- [2- (hydroxyethoxy) -ethyl] piperazine with dibenzo [b, f] [1, 4] thiazepin-11-ylamine.
摘要:
The present invention is directed to a method for the preparation of N-[4-(4-fluorophenyl)-5-formyl-6-isopropylpyrimidin-2-yl]-N-methylmethanesulfonamide and its use in the preparation of rosuvastatin or a pharmaceutically acceptable salt thereof.
摘要:
ABSTRACT The present invention relates to a process for preparing and purifying crystalline quetiapine hemifumarate, which comprises preparing crystalline quetiapine hemifumarate via a crystalline salt, which is not a salt of fumaric acid.
摘要:
The present invention relates to a process for preparing crystalline quetiapine hemifumarate, which comprises crystallizing or re-crystallizing quetiapine hemifumarate from a mixture of water and a water soluble alcohol.
摘要:
The present invention is directed to novel processes for the preparation of citalopram comprising halogenation of a phthalide compound of formula II, wherein R is a suitable group to be changed to CN, to afford an acid halogenide compound of formula III wherein R is as defined above and X is halogen, and thereafter obtaining citalopram through two successive reactions with suitable organometallic halides or organoboranes or by a reaction with organometallic 4-fluorophenylhalide or 4-fluorophenylborane followed by reduction and alkylation, and an exchange of R to cyano to afford citalopram. The order of the reactions can be varied depending e.g. on the starting compound used.
摘要:
Method for the preparation of 1-(3-dimethylaminopropyl)-1-(4-fluoro- phenyl)-1,3-dihydroisobenzofuran-5-carbonitrile (citalopram) comprising the reaction of a compound of formula (III) wherein X is a halogen, with organometallic dimethylaminopropyl halide. Other aspects of the invention are new compounds of formula (II) and formula (III) and their preparation.
摘要:
The invention relates to a process for the production of tamsulosin hydrochloride crystals where the crystal size distribution is controlled by controlling the temperature where hydrochloric acid is added to the reaction mixture.
摘要:
The invention relates to the use of copper-catalyzed nucleophilic aromatic substitution reaction for preparing 3-aryloxy-3-arylpropylamines and more specifically to a method of preparing certain 3-aryloxy-3-arylpropylamines and the pharmaceutically acceptable addition salts thereof, comprising reacting an amino alcohol with a haloaromatic compound in the presence of a base and a catalytic copper source, and in the absence of a separate ligand.
摘要:
The invention relates to a process for the production of tamsulosin hydrochloride crystals where the crystal size distribution is controlled by controlling the temperature where hydrochloric acid is added to the reaction mixture.