Process for the preparation of pyrazoles
    3.
    发明授权
    Process for the preparation of pyrazoles 失效
    制备吡唑的方法

    公开(公告)号:US06407259B1

    公开(公告)日:2002-06-18

    申请号:US09900097

    申请日:2001-07-06

    IPC分类号: C07D23110

    摘要: A “one-pot” process is described herein for the production of pyrazole compounds of general formula (II) comprising the steps of reacting a compound of general formula (III) with an acylating agent in the presence of a base and an optional activating agent followed by the addition of a hydrazine compound in situ.

    摘要翻译: 本文描述了用于制备通式(II)的吡唑化合物的“一锅”方法,包括以下步骤:在碱和任选的活化剂存在下使通式(III)的化合物与酰化剂反应 然后在原位加入肼化合物。

    Process for preparation of pyrazolo[4,3-d]pyrimidin-7-ones and intermediates thereof
    8.
    发明授权
    Process for preparation of pyrazolo[4,3-d]pyrimidin-7-ones and intermediates thereof 失效
    吡唑并[4,3-d]嘧啶-7-酮的制备方法及其中间体

    公开(公告)号:US06207829B1

    公开(公告)日:2001-03-27

    申请号:US09415440

    申请日:1999-10-08

    IPC分类号: C07D21300

    CPC分类号: C07D295/26 C07D487/04

    摘要: A process is provided for the preparation of a compound of formulae (IA) (sidenafil) and (IB) comprising reacting a compound of formula (IIA) and (IIB) respectively in the presence of —OR, wherein R in the case of formation of compound (IA) is CH2CH3 and R in the case of formation of compound (IB) is CH2CH2CH3, where X is a leaving group:

    摘要翻译: 提供了制备式(IA)(西多那非)和(IB)化合物的方法,包括分别在-OR存在下使式(IIA)和(IIB)化合物反应,其中在形成 化合物(IA)为CH 2 CH 3,在形成化合物(IB)的情况下,R为CH 2 CH 2 CH 3,其中X为离去基团: