反应详情

A solution of methyl 3-(4-{[(2-nitrophenyl)sulfonyl]amino}phenyl)propanoate (2.78 g, 7.63 mmol), 4-chloromethylbenzyl alcohol (1.21 g, 7.70 mmol) and triphenylphosphine (3.93 g, 15.4 mmol) in toluene (150 mL) was stirred under ice-cooling. Diethyl azodicarboxylate (40% toluene solution, 6.98 μmL, 15.4 mmol) was added, and the mixture was allowed to warm to room temperature and stirred for 72 hr. The reaction mixture was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (20%-60% ethyl acetate/hexane). Hexane-ethyl acetate was added to the obtained residue, and the resultant insoluble material was filtered off. The filtrate was concentrated to give the title compound (3.65 g, yield 95%) as a red oil.

1. temperaturecooling
2. concentrationThe reaction mixture was concentrated under reduced pressure
3. customthe residue was purified by silica gel column chromatography (20%-60% ethyl acetate/hexane)
4. additionHexane-ethyl acetate was added to the obtained residue
5. filtrationthe resultant insoluble material was filtered off
6. concentrationThe filtrate was concentrated