发明授权
US4474953A Process and intermediates for the preparation of
3(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-ones
失效
制备3（1H-四唑-5-基）-4H-吡啶并[1,2-a]嘧啶-4-酮的方法和中间体
- 专利标题： Process and intermediates for the preparation of 3(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-ones
- 专利标题（中）： 制备3（1H-四唑-5-基）-4H-吡啶并[1,2-a]嘧啶-4-酮的方法和中间体
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申请号： US416242申请日： 1982-09-09
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公开(公告)号： US4474953A公开(公告)日： 1984-10-02
- 发明人: James J. Wade
- 申请人： James J. Wade
- 申请人地址： MN St. Paul
- 专利权人： Riker Laboratories, Inc.
- 当前专利权人： Riker Laboratories, Inc.
- 当前专利权人地址： MN St. Paul
- 主分类号： C07D401/12
- IPC分类号： C07D401/12 ; C07D471/04
摘要：
A process for preparing compounds of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently selected from the group consisting of H, an alkyl group containing 1 to about 4 carbon atoms, an alkoxy group containing 1 to about 4 carbon atoms and halogen. The process involves reacting together a 2-aminopyridine, an alkyl tetrazol-5-ylacetate, and a trialkyl orthoformate and cyclizing the resulting intermediate.
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