反应详情

To a solution of 1.5 g (4.2 mmol) of tert-butyl 4-(4-formyl-2-naphthyl)-4-hydroxypiperidine-1-carboxylate in 25 mL of 2-methyl-2-propanol was added 2.3 mL (21 mmol) of 2-methyl-2-butene followed by dropwise addition of a solution of 1.00 g (8.45 mmol) of sodium dihydrogen phosphate and 877 mg (59.7 mmol) of sodium chlorite in 15 mL of water. The resulting mixture was stirred at ambient temperature for 2 h then evaporated in vacuo to remove all volatiles. The residue was diluted with water (5 mL) and an aqueous 2 N HCl solution was then added dropwise to the stirred mixture until a pH of 4 was achieved. The aqueous phase was then extracted with ethyl acetate (3×5 mL) and the combined organic layers were washed with brine (25 mL), dried over magnesium sulfate, filtered and evaporated in vacuo to yield the crude title compound as a colorless oil. LC/MS 394.2 (M+23).

1. customthen evaporated in vacuo
2. customto remove all volatiles
3. additionThe residue was diluted with water (5 mL)
4. additionan aqueous 2 N HCl solution was then added dropwise to the stirred mixture until a pH of 4
5. extractionThe aqueous phase was then extracted with ethyl acetate (3×5 mL)
6. washthe combined organic layers were washed with brine (25 mL)
7. dry with materialdried over magnesium sulfate
8. filtrationfiltered
9. customevaporated in vacuo