反应详情

温度

90 °C

A mixture of 8.2 g (35.0 mmol) 2,6-dichloro-4-methyl-pyridine-3-carboxylic acid ethylester, 3.7 ml (43.8 mmol) N-methylethylamine and 8.9 ml (52.5 mmol) DIPEA in NMP (25 ml) was heated in the MW to 90° C. for 1 h. Then the solution was diluted with water, a 1M aq. NaOH sol. and EtOAc. The organic layer was separated, dried over MgSO4 and concentrated in vacuo. Purification of the residue by CC (hexane/EtOAc 9:1) provided 4.0 g (15.6 mmol, 44%) 6-chloro-2-(ethyl(methyl)amino)-4-methyl-pyridine-3-carboxylic acid ethylester.

1. customThe organic layer was separated
2. dry with materialdried over MgSO4
3. concentrationconcentrated in vacuo
4. customPurification of the residue by CC (hexane/EtOAc 9:1)