发明授权
- 专利标题： Method for producing anellated triazoles and new anellated triazoles and their use
- 专利标题（中）： 制备茴香三唑和新的三联唑的方法及其用途
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申请号： US09719812申请日： 2000-12-18
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公开(公告)号： US06525000B1公开(公告)日： 2003-02-25
- 发明人: Gerhard Hamprecht , Olaf Menke , Robert Reinhard , Peter Schäfer , Cyrill Zagar , Martina Otten , Karl-Otto Westphalen , Helmut Walter
- 申请人： Gerhard Hamprecht , Olaf Menke , Robert Reinhard , Peter Schäfer , Cyrill Zagar , Martina Otten , Karl-Otto Westphalen , Helmut Walter
- 优先权： DE19829745 19980703
- 主分类号： C07D49804
- IPC分类号： C07D49804
摘要：
A process for preparing fused triazoles of formula I where: X—X is C—O, C—S, C—SO, C—SO2, or C—NR1; V is C═W2, R1R2C—C(═W2)— or C(═V2)—C(═W2); W1, W2 are oxygen or sulfur; which comprises reacting substituted N-aminoureas are reacted with formaldehyde or paraformaldehyde to give the corresponding methyleneimino ureas; cyclizing these in the presence of catalytic amounts of acid or metal oxide to give tetrahydro-4H-1,3,4-oxa(or thia)diazines, and cyclizing the fused triazoles using phosgene or a phosgene substitute. Also disclosed are novel fused triazoles of the formula I′
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