Sulfuric Acid → HCID 89657495, compound

Participants

Reaction Steps

A mixture of Example 252e, anisole (1.585 mL, 14.51 mmol) and concentrated sulfuric acid (4.3 mL, 81 mmol) in trifluoroacetic acid (20 mL, 260 mmol) was heated at 90° C. for 4 hours. Excess trifluoroacetic acid was removed under reduced pressure, and the residue was partitioned between water (100 mL) and ethyl acetate (200 mL). The organic layer was separated, and the aqueous layer was extracted with additional ethyl acetate (2×200 mL). The combined organic layers were washed with saturated aqueous sodium bicarbonate (100 mL), followed by saturated aqueous sodium chloride (100 mL), dried over anhydrous magnesium sulfate, filtered, and concentrated. The crude material was taken into methanol (50 mL) and the resulting solid was filtered, rinsed with methanol, and dried to provide the title compound (3.1 g, 63% yield).

Provenance & Evidence