反应详情

Step AAC (2): Followed a method described by A. de Meijer et. al Chem. Eur. J. 2007, 13, 3739. N-bromosuccinimide (52 mg, 0.29 mmol) was added to a solution of (9-(4-fluorophenyl)-1,4-dioxaspiro[4.5]dec-7-en-8-yloxy)trimethylsilane (89 mg, 276 mmol) in THF/water (1:1, 1.4 mL). The resulting mixture was allowed to stir for 2 hr. The crude reaction was diluted with EtOAc and washed with water. The organic layer was concentrated in vacuo to afford 7-bromo-9-(4-fluorophenyl)-1,4-dioxaspiro[4.5]decan-8-on (230 mg, 253%) yield). The crude product was used for subsequent chemistry without purification or characterization.

1. customThe crude reaction
2. washwashed with water
3. concentrationThe organic layer was concentrated in vacuo