反应详情

To a solution of 5-(dimethylamino)methyl-2-furanmethanol (6.2 g) and ethylene imine (2.82 g) in dry tetrahydrofuran was added a solution of methanesulphonic acid (11.6 g) in tetrahydrofuran (40 ml). The solution was evaporated and the oily residue heated at 98°-100° for 10 mins. After 18 hr, 5 N sodium hydroxide (60 ml) was added and the solution evaporated to dryness. Anhydrous sodium sulphate and ethyl acetate (150 ml) were added and after 2 hr the suspension was filtered, treated with decolourising charcoal and evaporated. The resulting oil was chromatographed on silica, firstly with methanol-ammonia 0.88 79:1, and the eluate discarded, and secondly with methanol-ammonia 0.88 19:1. This eluate was evaporated to give an oil from which the bisoxalate salt of 2-[[5-(dimethylamino)methyl-2-furanyl]methoxy]ethanamine (from ethanol) 0.2 g, m.p. 125°-128°, was obtained.

1. customThe solution was evaporated
2. temperaturethe oily residue heated at 98°-100° for 10 mins
3. addition5 N sodium hydroxide (60 ml) was added
4. customthe solution evaporated to dryness
5. additionAnhydrous sodium sulphate and ethyl acetate (150 ml) were added and after 2 hr the suspension
6. filtrationwas filtered
7. additiontreated with decolourising charcoal
8. customevaporated
9. customThe resulting oil was chromatographed on silica, firstly with methanol-ammonia 0.88 79:1
10. customThis eluate was evaporated