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US 6,307,053 B1Granted
Process for preparing imidacloprid
AssigneeSinon Corporation
InventorsChun-Lin Yeh, Chien-Hsing Chen
Life of this patent
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Abstract
A process for preparing imidacloprid involves reacting 2-nitroiminoimidazolidine with 2-chloro-5-chloromethyl pyridine in the presence of an alkali carbonate in an organic solvent. A stoichiometric amount of the 2-chloro-5-chloromethyl pyridine is gradually added into mixture of a corresponding stoichiometric amount of the 2-nitroiminoimidazolidine and the organic solvent under reflux condition.
Claims7
A process for preparing imidacloprid, comprising:
- reacting 2-nitroiminoimidazolidine with 2-chloro-5-chloromethyl pyridine in the presence of an alkali carbonate in an organic solvent, wherein a stoichiometric amount of the 2-chloro-5-chloromethyl pyridine is gradually added into mixture of a corresponding stoichiometric amount of the 2-nitroiminoimidazolidine and the organic solvent under reflux condition.
Dependencies are inferred from the claim text.