Sulfuric Acid → HCID 21458738, compound

Participants

Reaction Steps

A solution of 1.28 g of 5-benzyloxy-1,4-benzodioxane-7-carboxylic acid ethyl ester in 5 ml of tetrahydrofuran is added dropwise at room temperature to a solution of 110 mg of lithium aluminium hydride in 10 ml of tetrahydrofuran and the mixture is stirred at room temperature for a further 30 minutes. Then 0.22 ml of ethyl acetate, 1.5 ml of a mixture (water/tetrahydrofuran=1:1) and finally 2.25 ml of 2N sulfuric acid are added dropwise in succession. The reaction mixture is partitioned between diethyl ether and water. The organic phases are dried over sodium sulfate and concentrated by evaporation. The title compound is obtained from the residue by FC (240 g of silica gel, ethyl acetate/hexane=1:2): Rf (ethyl acetate-hexane=1:2)=0.18.

Provenance & Evidence