反应详情

A solution of diethyl [(6-nitro-4-quinazolinylamino)methylene]propanedioate (10.8 g) in N,N-dimethylformamide (325 ml) was shaken with 10% palladium on carbon (3.6 g) in hydrogen atmosphere at ambient temperature. After the absorption of hydrogen was finished, the catalyst was removed by filtration. The filtrate was concentrated under reduced pressure to give a residue, to which was added benzene. The mixture was concentrated under reduced pressure to give crude crystals of diethyl [(6-amino-4-quinazolinylamino)methylene]propanedioate.

1. customAfter the absorption of hydrogen
2. customthe catalyst was removed by filtration
3. concentrationThe filtrate was concentrated under reduced pressure
4. customto give a residue
5. concentrationThe mixture was concentrated under reduced pressure