反应详情

A solution of 5.0 g (21.8 mmol) 6-chloro-2-methoxy-4-methylpyridine-3-carboxylic acid methylester, 2.0 g (24.0 mmol) morpholine and 6.0 ml (43.5 mmol) NEt3 in NMP (21 ml) was heated at 90° C. for 2 d. After cooling to RT the mixture was partiotionated between EtOAc and a 1M aq. NaHCO3 sol. The organic layer was separated, dried over MgSO4 and concentrated in vacuo. Purification of the residue by CC (hexane/EtOAc 4:1) provided 2.7 g (9.8 mmol, 45%) 2-methoxy-4-methyl-6-morpholino-pyridine-3-carboxylic acid methylester.

1. customa 1M aq. NaHCO3 sol. The organic layer was separated
2. dry with materialdried over MgSO4
3. concentrationconcentrated in vacuo
4. customPurification of the residue by CC (hexane/EtOAc 4:1)