Procedure for preparing 11-(4-[2-(2-hydroxyethoxy)ethyl]-1-piperazineyl)-dibenzo[b,f] [1,4]thiazepine
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United States of America Patent
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Oct 5, 2010
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app pub date -
Jul 27, 2004
filing date -
Aug 8, 2003
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Abstract
The invention relates to a procedure for preparing quetiapine by reaction between a compound of formula (II) and a compound of formula (III), in which X means a leaving group and P a protective group of alcohols resistant to alkaline conditions, in the presence of a base, followed by a step of deprotection and, optionally, obtaining a pharmaceutically acceptable salt thereof.Said procedure permits the obtaining of quetiapine with a high degree of purity under soft temperature conditions, with short reaction times and avoiding the use of toxic solvents.(Graphic)
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