|Title:||Process and intermediate for the preparation of terazosin hydrochloride dihydrate|
|Abstract:||A process for the preparation of 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-tetrahydrofuroyl)piperazine hydrochloride (terazosin hydrochloride dihydrate comprises the steps of reacting 4-amino-2-chloro-6,7-dimethoxy-quinazoline with N-(2-tetrahydrofuroyl)piperazine in an anhydrous polar organic solvent in the absence of an added acid scavenger to produce anhydrous 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-tetrahydrofuroyl)piperazine hydrochloride (Form IV) and thereafter converting the product of that step to 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-tetrahydrofuroyl)-piperazine hydrochloride dihydrate.|
|Inventor(s):||Mannino; Anthony (Round Lake Beach, IL), Henry; Rodger F. (Waukegan, IL), Heitmann; Wayne R. (Lindenhurst, IL), Horrom; Bruce W. (Waukegan, IL)|
|Assignee:||Abbott Laboratories (Abbott Park, IL)|
Patent Claim Types:|
see list of patent claims
|Patent Number||Expiration Date|
|5,504,207||April 02, 2004|
|Country||Document Number||Estimated Expiration||Supplementary Protection Certificate||SPC Country||SPC Expiration|
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