7461-50-9

White to light brown solid

4-Amino-2-chloropyrimidine is a chloropyrimidine compound, which is widely used in the synthesis of various medicines and pesticides. It can be used to transform functional groups, such as amino groups, or to remove chlorine by hydrogenolysis; chlorine can also be used to couple various carbon-carbon bonds.

2,4-Dichloropyrimidine (1.0 g, 6.7 mmol) was used as starting material and 28% w/v aqueous ammonium hydroxide solution (20 mL) was added. The reaction mixture was stirred at room temperature overnight. Upon completion of the reaction, the solvent was removed by distillation under reduced pressure. The obtained residue was dried and subsequently purified by fast column chromatography (FCC) with the eluent being chloroform solution containing 2-10% ethanol, resulting in the isolation of 2-amino-4-chloropyrimidine and 2-chloro-4-aminopyrimidine. Product yields: 200 mg of 2-amino-4-chloropyrimidine in 23% yield and 600 mg of 2-chloro-4-aminopyrimidine in 69% yield.

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