Acetic Acid → 6-Methoxy-4,4-dimethyl-3,4-dihydronaphthalen-1(2H)-one

Participants

Reaction Steps

A solution of 7-methoxy-1,1-dimethyl-1,2,3,4-tetrahydronaphthalene (Intermediate 8, 1.65 g, 8.7 mmol) in 7.5 mL of glacial acetic acid was cooled to 0° C. and treated with a solution of chromium trioxide (2 g, 20 mmol) in 8mL of acetic acid and 7 mL of water. The reaction mixture was then allowed to warm to ambient temperature and stirred overnight. It was diluted with water and extracted with diethyl ether (×2). The combined organic phase was washed with water (×1), saturated aqueous sodium bicarbonate (×1) and brine (×1), dried over anhydrous magnesium sulfate, filtered and evaporated in vacuo to afford the title compound (1.64 g, 93%) as a yellow oil.

Provenance & Evidence