反应详情

温度

110 °C

A mixture of tert-butyl 6′-bromo-1′-oxo-1′,3′-dihydrospiro[azetidine-3,2′-indene]-1-carboxylate (0.2863 g, 0.8 mmol), 2-(trimethylsilyl)ethanesulfonamide (0.2000 g, 1.1 mmol), and Ti(OEt)4 (0.6900 g, 3.0 mmol) in 1,2-dichloroethane (3 mL) was heated at 110° C. for 20 h. The reaction mixture was then quenched with ice, extracted with CH2Cl2, 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 0.4031 g (96%) of tert-butyl 6′-bromo-1′-(((2-(trimethylsilyl)ethyl)sulfonyl)imino)-1′,3′-dihydrospiro[azetidine-3,2′-indene]-1-carboxylate. LC-MS tR=2.31 min in 3 min chromatography, m/z 515, 517 (MH+), 459, 461 (MH+-56).

1. customThe reaction mixture was then quenched with ice
2. extractionextracted with CH2Cl2
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