反应详情

Stir a mixture of bicyclo[3.2.1]octan-3-one (5.2 g, 41.9 mmol), (HCHO)n (1.51 g, 50.3 mmol), dimethylamine hydrochloride (3.42 g, 41.9 mmol) and 0.5 mL of conc. HCl in MeCN (50 mL) at 80° C. for 2 hours. After removal of the solvent under vacuum, dissolve the residue in H2O (20 mL) and wash with EtOAc (20 mL×3). Basify the aqueous solution with NaOH to pH=10. Extract the resultant aqueous mixture with EtOAc (60 mL×3). The combined organic layers are washed with brine (10 mL), dried over Na2SO4, filtered, and concentrated under vacuum to give crude 2-dimethylaminomethyl-bicyclo[3.2.1]octan-3-one as brown oil (5.9 g, yield: 78.7%). MS (m/z): 182 (M+1).

1. customAfter removal of the solvent under vacuum
2. dissolutiondissolve the residue in H2O (20 mL)
3. washwash with EtOAc (20 mL×3)
4. extractionExtract the resultant aqueous mixture with EtOAc (60 mL×3)
5. washThe combined organic layers are washed with brine (10 mL)
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated under vacuum