Process and intermediate for the preparation of terazosin hydrochloride
dihydrate
    3.
    发明授权
    Process and intermediate for the preparation of terazosin hydrochloride dihydrate 失效
    制备特拉唑嗪盐酸二水合物的方法和中间体

    公开(公告)号:US5504207A

    公开(公告)日:1996-04-02

    申请号:US324635

    申请日:1994-10-18

    CPC分类号: C07D405/12

    摘要: 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.

    摘要翻译: 制备1-(4-氨基-6,7-二甲氧基-2-喹唑啉基)-4-(2-四氢呋喃基)哌嗪盐酸盐(特拉唑嗪盐酸盐二水合物的方法包括使4-氨基-2-氯 - (4-四氢呋喃基)哌嗪在无水极性有机溶剂中的溶液中,加入无水1-(4-氨基-6,7-二甲氧基-2-喹唑啉基) -4-(2-四氢呋喃基)哌嗪盐酸盐(形式IV),然后将该步骤的产物转化为1-(4-氨基-6,7-二甲氧基-2-喹唑啉基)-4-(2-四氢呋喃基) - 哌嗪 盐酸盐二水合物。

    Aminobenzoic acid derivatives
    5.
    发明授权
    Aminobenzoic acid derivatives 失效
    氨基苯甲酸衍生物

    公开(公告)号:US4375478A

    公开(公告)日:1983-03-01

    申请号:US354117

    申请日:1982-03-02

    IPC分类号: A61K31/195 C07C101/60

    CPC分类号: C07C229/60

    摘要: Described are compounds of the formula ##STR1## wherein Y and Z independently of one another denote hydrogen, halo or trihalomethyl, with the proviso that Y and Z cannot both be hydrogen, R is hydrogen or loweralkyl, n is 5 to 19, and pharmaceutically acceptable salts thereof.The compounds are active hypocholesterolemic agents.

    摘要翻译: 描述的是下式的化合物,其中Y和Z彼此独立地表示氢,卤素或三卤代甲基,条件是Y和Z不能同时为氢,R为氢或低级烷基,n为5至19, 其可接受的盐。 这些化合物是活性降胆固醇药。