反应详情

A solution of 8-cyclopropyl-6-methoxy-4,4-dimethyl-3,4-dihydro-2H-naphthalen-1-one (Intermediate 156, 1.5 g, 6.14 mmol) and sodium cyanide (2 g, 40.8 mmol) in anhydrous dimethylsulfoxide (25 mL) was heated at 230° C. overnight under argon. The reaction mixture was then cooled to ambient temperature, poured into ice and acidified (Caution! Hydrogen cyanide evolution!) with dilute hydrochloric acid and extracted with ethyl acetate (×2). The combined organic extract was washed with brine (×1), dried over anhydrous sodium sulfate, filtered and evaporated to afford a dark brown oil. Flash column chromatography on silica gel (230-400 mesh) using 25% ethyl acetate in hexane as the eluent afforded the title compound as a solid (1.1 g, 78%).

1. additionpoured into ice
2. extractionextracted with ethyl acetate (×2)
3. extractionThe combined organic extract
4. washwas washed with brine (×1)
5. dry with materialdried over anhydrous sodium sulfate
6. filtrationfiltered
7. customevaporated
8. customto afford a dark brown oil