Dimethylformamide → alpha-(2'-(2,3-Epoxypropan-1-yloxy)benzylidene)-gamma-butyrolactone

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Dimethylformamide (30 ml) and potassium carbonate (4.4 g) were added to α-(2′-hydroxybenzylidene)-γ-butyrolactone (3 g), and a racemic compound of glycidyl nosylate (3.4 g) was added. The mixture was stirred at 50° C. for 3 hr. Water was added and the mixture was extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure to give oily α-(2′-(2,3-epoxypropan-1-yloxy)benzylidene)-γ-butyrolactone (3.2 g). This compound (0.4 g) was reacted in methanol with 4-(naphthalen-2-yl)piperidine (0.5 g) in the same manner as in Example 307 to give the title compound, melting point 127–128° C.

Herkunft & Nachweise