反应详情

Hydrazine hydrate (5 ml) in methanol (25 ml) was added with stirring over 20 minutes to a cooled (10° C.) solution of 2-[4-(5-bromo-3-methylpyrid-2-yl)butylamino]-3-nitro-5-(pyrid-3-ylmethyl)pyridine (4.75 g) in methanol (250 ml) containing Raney Nickel (ca. 3 g). The solution was stirred for a further 30 minutes, the catalyst was removed by filtration and the filtrate was concentrated to dryness in vacuo. The residue was chromatographed on silica eluted with 5% v/v methanol in chloroform and then recrystallised from acetonitrile to give the title compound (2.78 g), m.p. 85°-87° C.

1. stirringThe solution was stirred for a further 30 minutes
2. customthe catalyst was removed by filtration
3. concentrationthe filtrate was concentrated to dryness in vacuo
4. customThe residue was chromatographed on silica
5. washeluted with 5% v/v methanol in chloroform
6. customrecrystallised from acetonitrile