反应详情

5% Pd/C (25 mg) and CH3COONa (820 mg, 10 mmol) are added to a solution of 2,4-dichloro-6-methyl-5-propyl-pyrimidine (1.02 g, 5 mmol) in EtOAc (25 ml). The mixture is then hydrogenated at 50 psi overnight. The catalyst is filtered and the solvent is removed in vacuo. Flash column chromatography of the residue on silica gel by 4:1 hexane, EtOAc provides 2-chloro-6-methyl-5-propyl-pyrimidine (LC-MS, M+1 171.7), 4-chloro-6-methyl-5-propyl-pyrimidine (LC-MS, M+1 171.7) and 6-methyl-5-propyl-pyrimidine (LC-MS, M+1 157.7) as 1:1:1.5 mixture, which is separated by HPLC.

1. customis then hydrogenated at 50 psi overnight
2. filtrationThe catalyst is filtered
3. customthe solvent is removed in vacuo