反应详情

To a solution of 1-(tert-butoxycarbonyl)-2-tert-butyl-3-methyl-4-imidazolidinone (2 g, 8.3 mmol) (BOC-ON) in chloroform (15 ml) was added (2S)-2-methylpiperazine (5 g, 50 mmol), a compound of formula (6), and triethylamine (1.25 g, 12.5 mmol) in chloroform. The mixture was stirred for about 15 hours at room temperature, and then washed with water, the solvent removed from the organic layer under reduced pressure, and the residue purified using column chromatography, to give tert-butyl (3S)-3-methylpiperazinecarboxylate, a compound of formula (7).

1. washwashed with water
2. customthe solvent removed from the organic layer under reduced pressure
3. customthe residue purified