PROCESS FOR PURIFICATION OF 2-ALKYL-6-OXO 1,6 DIHYDRO 3,4- BIPYRIDINE-5- CARBONITRILE

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专利权人:

发明人:

GURJAR MUKUND KESHAV,TRIPATHY NARENDRA KUMAR,MAHALE RAJENDRA DAGESING,CHASKAR SUDHIR PANDITRAO,PAWAR RAMKUMAR YASHWANTRAO,MEHTA SAMIT SATISH

申请号：

IN3130/MUM/2014

公开号：

IN2014MU03130A

申请日:

2014.10.01

申请国别(地区):

IN

年份:

2016

代理人:

摘要：

The present invention provides a method for purification of 2-alkyl-6-oxo 1,6 dihydro-3,4-bipyridine-5-carbonitrile derivatives (I) comprising separation of associated impurities at pH 9-10 by addition of an acid and further acidifying the filtrate to provide compound (I), having purity conforming to regulatory specifications.

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