Potassium Carbonate → 6-Cyclopentyl-6-[2-(3-ethyl-4-hydroxy-phenyl)-ethyl]-dihydro-pyran-2,4-dione

Participants

Reaction Steps

A mixture of acetic acid 4-[2-(2-cyclopentyl-4,6-dioxo-tetrahydro-pyran-2-yl)-ethyl]-2-ethyl-phenyl ester (0.92 g, 2.47 mmol, from Step 3), potassium carbonate (0.68 g, 4.9 mmol) in MeOH (10 mL) was stirred at rt for 1 h. The reaction mixture was partitioned between 1 N HCl and EtOAc. The organic layer was washed with brine, dried over Na2SO4 and concentrated to a yellow oil. The oil was purified by silica gel chromatography (20% to 40% EtOAc in hexanes) to give the title compound (2.44 g, 59%).

Provenance & Evidence