反应详情

1-(3-Chloro-propyl)-4-methyl-piperazine hydrochloride (1.7 g, 9.6 mmol, 1.2 eq.) is added in one portion to a mixture of 4-aminophenol (893 mg, 8.0 mmol) and finely powdered sodium hydroxide (808 mg, 20 mmol, 2.5 eq.) in DMF (27 ml). The reaction mixture is stirred for 17 h at RT. The resulting dark suspension is filtered. The filtrate is diluted with DCM (200 ml) and washed with brine (2×50 ml). The aqueous layer is back-extracted with DCM. The organic phase is dried (sodium sulfate), filtered and concentrated. Purification of the residue by silica gel column chromatography (DCM/MeOH, 7:3) provides 1.86 g of the title compound as a yellow-brown oil: ESI-MS: 250.2 [MH]+; TLC: Rf=0.31 (DCM/MeOH, 7:3).

1. filtrationThe resulting dark suspension is filtered
2. additionThe filtrate is diluted with DCM (200 ml)
3. washwashed with brine (2×50 ml)
4. extractionThe aqueous layer is back-extracted with DCM
5. dry with materialThe organic phase is dried (sodium sulfate)
6. filtrationfiltered
7. concentrationconcentrated
8. customPurification of the residue by silica gel column chromatography (DCM/MeOH, 7:3)