P-Anisidine → [(2,4-Dichloropyrimidin-5-yl)methyl](4-methoxyphenyl)amine

Participants

Reaction Steps

A 500-mL, three-necked flask equipped with a magnetic stirrer, thermometer, and nitrogen-inlet bubbler was charged with a solution of 2,4-dichloro-5-(iodomethyl)pyrimidine (85 g, ca. 253.2 mmol) (from Example 1c supra) in toluene (13.7 mL) from the previous step and toluene (96.3 mL, thus, a total of ca. 110 mL of toluene). After cooling with an ice-water bath, p-anisidine (31.18 g, 253.2 mmol) (Aldrich) was added. After stirring for 30 minutes, a solution of sodium hydroxide (13.54 g, 331.7 mmol) in water (50 mL) was added dropwise over 8 minutes, while maintaining the temperature of the reaction mixture at 10–15° C. hexanes (55 mL) was added and the mixture was stirred at 10–15° C. for 45 minutes, then at room temperature for 22 hours to give a slurry. TLC analysis of the supernatant indicated complete reaction. The slurry was diluted with water (100 mL) and the solid was collected by filtration, washed with cold water and cold (−50° C.) methanol (100 mL), and dried by suction to give [(2,4-dichloropyrimidin-5-yl)methyl](4-methoxyphenyl)amine as an off-white solid, 97% pure by HPLC analysis. (Yield 59.87 g, 83.2%).

Provenance & Evidence