反应详情

温度

210 °C

To a solution of 3-benzyl-6-chloro-4,5-dimethyl-pyridazine (1.0 g, 4.3 mmol) in NMP (10 mL) is added 4-methyl-piperidine-4-carboxylic acid ethyl ester (2.0 g, 8.6 mmol) and DIPEA (3.7 mL, 21.6 mmol). The mixture is heated in microwave at 210° C. for 1.5 h. The mixture is concentrated at 80° C. by rotovaporation. The crude product is purified by HPLC (CH3CN/H2O: 22%˜45% with 0.1% TFA) to give 1-(6-benzyl-4,5-dimethyl-pyridazin-3-yl)-4-methyl-piperidine-4-carboxylic acid ethyl ester (0.64 g, 41%).

1. concentrationThe mixture is concentrated at 80° C. by rotovaporation
2. customThe crude product is purified by HPLC (CH3CN/H2O: 22%˜45% with 0.1% TFA)