反应详情

温度

-25 °C

A stirred, cooled (−40° C.) solution of 6-methoxy-4,4-dimethyl-8-vinyl-3,4-dihydro-2H-naphthalen-1-one (Intermediate 155, 51.7 g, 7.4 mmol) in diethyl ether (10 mL) was treated with a solution of diazomethane in ether (40 mmol in 50 mL of ether) followed by palladium(II) acetate (0.08 g) and the resulting reaction mixture was warmed to −25° C. when effervescence was observed. The reaction mixture was then filtered through a plug of silica and the filtrate was evaporated to afford a dark brown residue that was subjected to flash column chromatography over silica gel (23-400 mesh) using 20% ethyl acetate in hexane as the eluent to afford the title product as a pale yellow solid (1.5 g, 83%).

1. customthe resulting reaction mixture
2. filtrationThe reaction mixture was then filtered through a plug of silica
3. customthe filtrate was evaporated
4. customto afford a dark brown residue that