摘要:
The invention discloses a process for the preparation of the polymorph A of doxazosin mesylate, consisting essentially of reacting doxazosin base with methanesulfonic acid in a mixture of solvents containing an alcohol and a chlorinated solvent, subsequently removing the chlorinated solvent by distillation and precipitating the desired product in an alcohol, after heating the suspension formed to the reflux temperature of the solvent.
摘要:
Process for producing venlafaxine and/or physiologically acceptable addition salts thereof, consisting in reacting a compound having the general formula (II) wherein R is a C1-C10 alkyl group, aryl group, aralkyl group or cycloalkyl group having from 3 to 6 carbon atoms, with an organomagnesian compound having the general formula (III) wherein X is a halogen atom and, if desired, a salt of venlafaxine can be obtained by reaction with a physiologically acceptable acid.
摘要:
The invention relates to a method for obtaining polymorph A from doxazosine mesylate, essentially consisting in reacting the basic doxazosine with methanesulphonic acid in a mixture of solvents containing an alcohol and a chlorinated solvent, subsequently eliminating the chlorinated solvent by distillation and precipitating the desired product in an alcohol after previously heating the resulting suspension to solvent reflux temperature.
摘要:
A process for the preparation of venlafaxin and/or the physiologically acceptable addition salts thereof that consists of reacting a compound of general formula (II) where R is a C 1 -C 10 alkyl, aryl, aralkyl or cycloalkyl group of 3 to 6 atoms of carbon, with a organomagnesium compound of general formula (III) where X is an atom of halogen and, if desired, a salt of the thus obtained venlafaxin is formed by reaction thereof with a physiologically acceptable acid.