反应详情

A mixture of 2.61 g of 2,3-epoxy-2, 3-dihydro-1,4-naphthoquinone, 2.67 g of N-benzyl-N,N'-dimethylethylene-diamine and 150 ml of absolute ethanol was stirred for 20 hours, then concentrated to one-half its original volume and refrigerated overnight. The solvent was removed, the residue dissolved in dichloromethane and passed through a pad of hydrous magnesium silicate and silica, eluting first with dichloromethane, then with 1% methanol in dichloromethane. The active fraction was flash chromatographed eluting with dichloromethane followed by 2% methanol in dichloromethane. The active fraction was evaporated and the residue triturated in dichloromethane/-hexane giving 900 mg of the desired product, mp 121°-123° C.

1. concentrationconcentrated to one-half its original volume and refrigerated overnight
2. customThe solvent was removed
3. dissolutionthe residue dissolved in dichloromethane
4. washeluting first with dichloromethane
5. customchromatographed
6. washeluting with dichloromethane
7. customThe active fraction was evaporated
8. customthe residue triturated in dichloromethane/-hexane giving 900 mg of the desired product, mp 121°-123° C.