反应详情

To a solution of 512 mg g (2.31 mmol) of 3-nitro-4-piperidin-1-yl-phenylamine (as prepared in the previous step) and 404 mg (2.10 mmol) of mechlorethamine hydrochloride in 15 mL of EtOH was added 1.45 g (10.5 mmol) of anh K2CO3 and the mixture heated to reflux under Ar for 48 h. The mixture was cooled to RT, concentrated in vacuo, extracted with EtOAc (3×20 mL) and the combined extracts filtered (Celite), and concentrated to a dark oil. Chromatography of the resulting residue on a 70-g silica SPE column with a gradient of 0-3% MeOH-dichloromethane afforded 456 mg (71%) of the title compound as a dark red solid: Mass spectrum (ESI, m/z): Calcd. for C16H24N4O2, 305.2 (M+H), found 305.1.

1. temperaturethe mixture heated
2. temperatureto reflux under Ar for 48 h
3. concentrationconcentrated in vacuo
4. extractionextracted with EtOAc (3×20 mL)
5. filtrationthe combined extracts filtered (Celite)
6. concentrationconcentrated to a dark oil