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China Suppliers Factory for 2-Chloro-3-cyanopyridine CAS:6602-54-6 - High Quality Chemical Product
The product is prepared by chlorination reaction of 3-cyanopyridine nitrogen oxide and a chlorinating agent. Phosphorus pentachloride is used as a chlorinating agent and phosphorus oxychloride is used as a solvent to react 3-cyanopyridine nitrogen oxide and phosphorus pentachloride. After the reaction is completed, phosphorus oxychloride is removed by vacuum distillation. Ice water is slowly added to the distillation residue, cooled and crystallized, filtered, washed with cold water, and dried to obtain the target product.
Chlorination Reaction
Utilizes 3-cyanopyridine nitrogen oxide with Phosphorus pentachloride.
Solvent Efficiency
Phosphorus oxychloride acts as a highly effective solvent for the reaction.
Purification Process
Includes vacuum distillation followed by controlled crystallization.
Frequently Asked Questions
What are the primary raw materials used in this synthesis?
The synthesis primarily uses 3-cyanopyridine nitrogen oxide as the precursor and phosphorus pentachloride as the chlorinating agent.
What is the role of phosphorus oxychloride in the reaction?
Phosphorus oxychloride serves as the solvent in which the reaction between 3-cyanopyridine nitrogen oxide and phosphorus pentachloride takes place.
How is the solvent removed after the reaction?
Once the reaction is complete, the phosphorus oxychloride solvent is removed from the mixture via vacuum distillation.
What steps are taken to isolate the crystals?
Ice water is slowly added to the distillation residue to initiate cooling and crystallization, which is then followed by filtration.
How is the final target product purified?
The filtered crystals are washed with cold water and then dried to achieve the final target product.