发明名称 |
PURE INTERMEDIATE |
摘要 |
<p>The present invention relates to an improved process for the preparation of Letrozole (I) and its synthetic intermediate 4-[(1-(1,2,4-triazolyl)methyl]benzonitrile (III). In particular, it relates to a process to prepare Letrozole and its intermediate (III) substantially free from regioisomeric impurities. The present invention further relates to acid addition salts of 4-[(1-(1,2,4-triazolyl)methyl]benzonitrile (III) such as the oxalate salt, and also to Letrozole (I), the intermediate (III) and salts thereof preparable by the processes of the present invention.</p> |
申请公布号 |
CA2809086(A1) |
申请公布日期 |
2012.03.01 |
申请号 |
CA20112809086 |
申请日期 |
2011.08.26 |
申请人 |
GENERICS (UK) LIMITED |
发明人 |
GORE, VINAYAK GOVIND;SHUKLA, VINAY KUMAR;MEKDE, SANDEEP;HASBE, SURESH;BHANDARI, SHREYAS;SHINDE, DHANANJAY;PATIL, MADHUKAR SHALIGRAM |
分类号 |
C07D249/08;A61K31/4196;A61P35/00 |
主分类号 |
C07D249/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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