发明授权
US5919931A Process for the manufacture of intermediates suitable to make doxazosin, terazosin, prazosin, tiodazosin and related antihypertensive medicines 失效
制造适合制造多沙唑嗪,特拉唑嗪,哌唑嗪,替沙星和相关抗高血压药物的中间体的方法

Process for the manufacture of intermediates suitable to make doxazosin,
terazosin, prazosin, tiodazosin and related antihypertensive medicines
摘要:
A process is provided for the manufacture of: where R is: ##STR1## comprising reacting: ##STR2## wherein R.sub.1 may be selected from H, Methyl, Ethyl and suitable lower alkyl groups, C.sub.n H.sub.2n+1 (where n is from 3 to 5) or any other suitable group and thereafter if desired converting the resultant product to a salt thereof.
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