反应详情

4-(2-Chloro-ethyl)-morpholine hydrochloride (4.2 g, 22 mmol, 1.2 equiv) is added in one portion to a mixture of 4-aminophenol (2 g, 18.3 mmol) and finely powdered sodium hydroxide (1.87 g, 45.8 mmol, 2.5 equiv) in DMF (32 mL), under an argon atmosphere. The reaction mixture is stirred for 23.5 h at RT. The resulting dark suspension is filtered. The filtrate is diluted with DCM (200 ml) and washed with brine (2×60 mL). The organic phase is dried (sodium sulfate), filtered and concentrated. Purification of the residue by silica gel column chromatography (DCM/EtOH, 95:5→7:3) provides the title compound as a yellow-brown solid: API-MS: 223.2 [MH]+; TLC: Rf=0.31 (DCM/EtOH, 9:1).

1. filtrationThe resulting dark suspension is filtered
2. additionThe filtrate is diluted with DCM (200 ml)
3. washwashed with brine (2×60 mL)
4. dry with materialThe organic phase is dried (sodium sulfate)
5. filtrationfiltered
6. concentrationconcentrated
7. customPurification of the residue by silica gel column chromatography (DCM/EtOH, 95:5→7:3)