Ethanol → HCID 21544827, compound

Participants

Reaction Steps

A solution of 1-(2-acetyl-3-hydroxyphenoxy)-2-hydroxy-3-phenoxypropane (12.08 g) in diethyl oxalate (30 ml) was added to a suspension of sodium ethoxide, prepared from sodium (6.0 g) and ethanol (60 ml), in benzene (100 ml). The mixture was heated under reflux for 1.5 hours, cooled and poured into ether. The precipitated yellow solid was collected, washed with ether and dried. The solid was then added to a mixture of glacial acetic acid (80 ml) and concentrated hydrochloric acid (30 ml) and heated under reflux for 1 hour. After cooling, the reaction mixture was poured with stirring into cold water (1 L). The precipitated gum was washed with water by decantation and solidified by trituration with acetic acid. Recrystallization from acetic acid gave 1-(2-carboxychromon-5-yloxy)-2-hydroxy-3-phenoxypropane (7.0 g) as a white powder, m.p. 88°-90° C.

Provenance & Evidence