Process for the production of the form I of the terazosin monohy

Details Process for the production of the form I of the terazosin monohy Process for the production of the form I of the terazosin monohy

1997-10-21

1999-01-05

Bernhardt, Emily

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

514260, C07D40514

Patent

active

058564829

ABSTRACT:
The process for the production of the form I of the terazosin monohydrochloride anhydrous consists of treating at the boiling temperature terazosin monohydrochloride dihydrate with a mixture of methanol and a solvent selected from C.sub.2 -C.sub.6 straight or branched alcohols, the esters of the C.sub. -C.sub.8 carboxylic aliphatic acids with C.sub.1 -C.sub.8 straight or branched alcohols, C.sub.3 to C.sub.8 aliphatic ketones, C.sub.4 to C.sub.8 straight, branched or cyclic aliphatic ethers, aliphatic amides and the aliphatic nitriles.

REFERENCES:
patent: 4026894 (1977-05-01), Winn et al.
patent: 4251532 (1981-02-01), Roteman
patent: 5294615 (1994-03-01), Meyer et al.
patent: 5362730 (1994-11-01), Baver et al.
patent: 5412095 (1995-05-01), Morley et al.
patent: 5587377 (1996-12-01), Patel et al.
patent: 5675006 (1997-10-01), Karimian et al.
patent: 5686612 (1997-11-01), Karimian et al.

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