Lithium hydroxide, monohydrate → HCID 54303636, compound

Participants

Reaction Steps

To a mixture of 1.55 g of the ester from Example 3 and 35 ml of 1:1 tetrahydrofuran-water was added 2.3 g of lithium hydroxide monohydrate, with stirring. The mixture was stirred at room temperature for 22 hours then diluted with water and extracted 3 times with ether (ether extracts discarded). The aqueous solution was acidified to pH 1 by the addition of saturated aqueous oxalic acid and worked-up with ether in the usual manner. There was obtained 1.4 g (95.8%) of racemic-7-[3-(4-acetyl-3-hydroxy-2-propylphenoxy)propoxy]-3,4-dihydro-2-methyl-2H-1-benzopyran-2-propanoic acid as a viscous yellow oil.

Provenance & Evidence