Potassium Hydroxide → HCID 54264423, compound

Participants

Reaction Steps

To a stirred suspension of 4,5-dimethoxy-2-hydroxy-benzaldehyde (9.3 g) in dry ethanol (90 ml) under nitrogen was added slowly a solution of potassium hydroxide (3.14 g) in dry ethanol (60 ml). The resulting solution was stirred for 20 minutes, then 5-bromo-4-oxo-pentanoic acid methyl ester (10.65 g) was added slowly. The mixture was stirred for 24 hours, then diluted slowly with water (900 ml). The precipitated solid was filtered off, washed with water, dried under vacuum and crystallized from acetone-ether to give 4-(5,6-dimethoxy-benzo[b]furan-2-yl)-4-oxo-butanoic acid methyl ester (4.78 g).

Provenance & Evidence