反应详情

To a slurry of title compound 91 (4 g, 17.15 mmol) and methyl 4-(chlorocarbonyl)benzoate (3.58 g, 18.01 mmol) in benzene (60 mL) at 0° C. was added pyridine (4.85 mL, 60.0 mmol) drop wise followed by a single crystal of DMAP. The temperature was raised to room temperature and the reaction mixture was left to stir for 1 h. The reaction mixture was filtered and the filtrate was diluted with 5% aq HCl and ethyl acetate. The organic layer was washed with 5% aq HCl, water and brine then left in the fridge over the weekend. The precipitated solid was filtered, washed with water and hexanes to afford title compound 92 (6.38 g, 94%) as an off-white solid. LRMS (ESI): (calc) 395.12. (found) 396.4 (MH)+.

1. waitthe reaction mixture was left
2. filtrationThe reaction mixture was filtered
3. additionthe filtrate was diluted with 5% aq HCl and ethyl acetate
4. washThe organic layer was washed with 5% aq HCl, water and brine
5. waitthen left in the fridge over the weekend
6. filtrationThe precipitated solid was filtered
7. washwashed with water and hexanes