Sodium bis(trimethylsilyl)amide → 6-Bromo-3,3-difluoro-1-((2-(trimethylsilyl)ethoxy)methyl)indolin-2-one

Participants

Reaction Steps

Into the solution of 6-bromo-3,3-difluoroindolin-2-one in DMF (5 mL), was added 1M of NaHMDS solution in THF (1.6 mL), after 30 min., (2-(chloromethoxy)ethyl)trimethylsilane (269 mg) was added. After being stirred at rt for 4 h, the reaction mixture was extracted with ethyl acetate and washed with brine, dried and the solvent was removed, the residue was purified by silica gel chromatography to provide 0.46 g of 6-bromo-3,3-difluoro-1-((2-(trimethylsilyl)ethoxy)methyl)indolin-2-one 7.35. 1H NMR (400 MHz, Chloroform-d) δ 7.43 (s, 1H), 7.37 (d, J=8.2 Hz, 1H), 7.33 (d, J=8.1 Hz, 1H), 5.12 (s, 2H), 3.58 (m, 2H), 1.21 (m, 2H), 0.00 (s, 9H).

Provenance & Evidence