PATEL NATU M,PATEL ANKIT,PATEL Karan,NALWAYA Niranjan,VYAS BHAVESH
申请号：
IN201621026917
公开号：
IN201621026917A
申请日:
2016.08.06
申请国别(地区):
IN
年份:
2018
代理人:
摘要：
The embodiment of the present invention is an improved process for the preparation of imidacloprid which reduces impurities along with dimer impurities. The present invention is an improved process for preparation of imidacloprid which comprises of condensing 2- chloro-5-chloromethyl pyridine (CCMP) with 2-nitroimino imidazolidine (NII) in the presence of alkali base and aprotic solvent, specifically dimethylformamide(DMF). Further, crude imidacloprid is purified by recovery of DMF and adding an alcoholic solvent. The imidacloprid thus obtained through said process gives high yield with high purity. Said invention thus reduces impurities from Imidacloprid in an efficient and economical manner.
