Borane;tetrahydrofuran → 5-(2-hydroxy-1-methylethyl)-4-methyl-2-benzofuran-1(3H)-one

Participants

Reaction Steps

To a solution of 2-(4-methyl-1-oxo-1,3-dihydro-2-benzofuran-5-yl)propanoic acid (300 mg, 1.4 mmol) in 18 mL of anhydrous THF was added BH3.THF (2 mL, 2 mmol) dropwise at 0° C. Then the mixture was warmed to room temperature slowly and then stirred for 3 hours. Then the mixture was quenched with MeOH and the solvent was removed under vacuum. The residue was the purified via prep-TLC to give 5-(2-hydroxy-1-methylethyl)-4-methyl-2-benzofuran-1(3H)-one.

Provenance & Evidence