反应详情

温度

50 °C

A mixture of 314 mg (1.73 mmol, 1.2 eq) of C-(5-methylfuran-2-yl)-C-(3-methyloxetan-3-yl)methylamine and 400 g (1.44 mmol, 1 eq) of 3-ethoxy-4-[2-hydroxy-3-(1-hydroxyethyl)phenylamino]cyclobut-3-ene-1,2-dione in 15 ml of methanol was heated at 50° C. for 2 days. The reaction medium was evaporated and the residue was chromatographed on silica gel HP (column RediSep Rf Gold 40 g, Spot II) eluted with dichloromethane/methanol (gradient). The amorphous solid was taken up with a little diethyl ether, filtered and dried under vacuum at 50° C. 151 mg of 3-[2-hydroxy-3-(1-hydroxyethyl)phenylamino]-4-{[(5-methylfuran-2-yl)-(3-methyloxetan-3-yl)methyl]amino}cyclobut-3-ene-1,2-dione were obtained in the form of an orange solid. (Mp=129-131° C.). Yield=25%. LC/MS: 96.1% [412]: 2 diastereoisomers.

1. customThe reaction medium was evaporated
2. customthe residue was chromatographed on silica gel HP (column RediSep Rf Gold 40 g, Spot II)
3. washeluted with dichloromethane/methanol (gradient)
4. filtrationfiltered
5. customdried under vacuum at 50° C