反应详情

To a solution of tert-butyl 3-cyanoazetidine-1-carboxylate (2.1774 g, 11.95 mmol) and 4-bromo-1-(bromomethyl)-2-iodobenzene (5.0227 g, 13.36 mmol) in THF (30 mL) was added LiHMDS (1.0 Min THF, 15 mL, 15 mmol) at −78° C. The mixture was allowed to slowly warm to room temperature over 20 h. The reaction mixture was then quenched with saturated NH4Cl, extracted with EtOAc, and dried over Na2SO4. After the solvent was evaporated under reduced pressure, the residue was purified by chromatography on silica gel eluted with hexanes/ethyl acetate to afford 4.2959 g (75%) of tert-butyl 3-(4-bromo-2-iodobenzyl)-3-cyanoazetidine-1-carboxylate as foam. LC-MS tR=2.17 min in 3 min chromatography, m/z 477, 479 (MH+), 462, 464 (MH+-15), 421, 423 (MH+-56).

1. customThe reaction mixture was then quenched with saturated NH4Cl
2. extractionextracted with EtOAc
3. dry with materialdried over Na2SO4
4. customAfter the solvent was evaporated under reduced pressure
5. customthe residue was purified by chromatography on silica gel
6. washeluted with hexanes/ethyl acetate