反应详情

7.82 g (64.0 mmol) benzoic acid and 20 mL POCl3 are stirred together at 100° C. for 30 min. Within 45 min 7.00 g (42.7 mmol) 2,6-dichloro-5-aminopyrimidine are added by several portions. The reaction mixture is stirred for additional 2 h at the same temperatur. After that the mixture is carefully added to an ice cold aq. NaOH solution. The resulting precipitate is filtered, washed with water and dried.

1. filtrationThe resulting precipitate is filtered
2. washwashed with water
3. customdried