反应详情

To a solution of 27C (18.2 g, 100 mmol) in CH2Cl2 (300 mL) was added PBr3 (4.5 mL, 48 mmol) at 0° C., then the resulting mixture was allowed to warm to RT overnight. The reaction mixture was quenched with saturated NaHCO3 (50 mL) and stirred at RT for an addition 0.5 h. The mixture was extracted with CH2Cl2, and the combined extracted were dried (MgSO4), filtered, and evaporated in vacuum to give the product as a yellow oil (20.2 g, 82%, two steps). 1H NMR (300 MHz, CDCl3): δ 3.45 (s, 1H), 3.75 (t, 2H, J=4.8 Hz), 4.12 (t, 2H, J=4.8 Hz), 4.45 (s, 2H), 6.85-6.99 (m, 3H), 7.21-7.26 (m, 1H). LC-MS: purity >95%, ESI-MS: M/Z 245 (M+H)+, 247 (M+2+H)+.

1. customThe reaction mixture was quenched with saturated NaHCO3 (50 mL)
2. extractionThe mixture was extracted with CH2Cl2
3. extractionthe combined extracted
4. dry with materialwere dried (MgSO4)
5. filtrationfiltered
6. customevaporated in vacuum