N,N-Diethylaniline → 2-Chloro-4-(3-chloro-4-methoxybenzylamino)-5-ethoxycarbonylpyrimidine

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-hydroxy-4-(3-chloro-4-methoxybenzylamino)-5-ethoxycarbonylpyrimidine (prepared in Example 92) 500 mg, diethylaniline 2 ml and phosphoryl chloride 4 ml is stirred at 80° C. for 30 minutes and then at 100° C. for 5 hours. After cooling, the reaction solution is poured into water in ice and the mixture is stirred at room temperature for 30 minutes. The product is extracted with ethyl acetate and the organic layer is washed with water and an aqueous saturated sodium chloride solution, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue is purified by silica gel chromatography (silica gel 7 g, solvent; chloroform) to give 2-chloro-4-(3-chloro-4-methoxybenzylamino)-5-ethoxycarbonylpyrimidine as a slightly yellow crystalline powder, 375 mg. mp 114–115° C. MS(m/z): 356(M+H)+

Provenance & Evidence