反应详情

1-chlorocarbonyl-4-(2,3-dimethylphenyl)piperazine Compound 40A is prepared according to the procedure described for compound 15A, using the following reactants: 1-(2,3-dimethylphenyl)piperazine (3.94 g, 20.7 mmol); triphosgene (2.05 g, 6.9 mmol); pyridine (1.68 ml, 21 mmol); dichloromethane (150 ml).