Potassium Carbonate → Chromone

Participants

Reaction Steps

A mixture of l.5 g (6.41 mmoles) of 2-carboethoxy-7-hydroxy4-oxo-4H-l-benzopyran, l.82 g (6.41 mmoles) of 2-(3-chloromethylphenoxy)methylquinoline and 0.886 g of potassium carbonate in 12 ml of dimethylformamide and 96 ml of acetone is refluxed for 2 days, cooled, concentrated in vacuo and the residue taken up in water and is extracted into ethyl acetate. The solution is concentrated and the crude product is recrystallized from ethyl acetate to give 0.585 g of 2-carboethoxy-7-(3-quinolin-2-ylmethoxy)benzyloxy)-4-oxo-4H-1-benzopyran as a pale yellow solid having an m.p. of 123°-24° C.

Provenance & Evidence