N-Triisopropylsilylpyrrole → 3-Bromo-1-(triisopropylsilyl)pyrrole
反応式
[CH:1]([Si:4]([CH:13]([CH3:15])[CH3:14])([CH:10]([CH3:12])[CH3:11])[N:5]1[CH:9]=[CH:8][CH:7]=[CH:6]1)([CH3:3])[CH3:2].[Br:16]NC(=O)CCC(N)=O>C1COCC1>[Br:16][C:7]1[CH:8]=[CH:9][N:5]([Si:4]([CH:1]([CH3:3])[CH3:2])([CH:10]([CH3:12])[CH3:11])[CH:13]([CH3:15])[CH3:14])[CH:6]=1参加物
4
反応条件
- 温度
- -78 °C
実験手順
To a solution of 1-triisoproylsilyl-pyrrole (13.2 g,0.059 mol) in 250 ml of THF at -78° C. was added 10.45 g (0.0587 mol) of N-bromosuccinamide (NBS), the mixture was stirred at -78° C. for 3 h. The reaction mixture was warmed to room temperature and concentrated in vacuo, and the resulting residue in hexane was stirred overnight. The hexane solution was filtered through alumina eluting with hexane, the eluent was concentrated in vacuo, and the residue was distilled (b.p. 107°-108° C./0.2 mm) to afford 10.4 g (58.4%) of 3-bromo-1-triisopropylsilyl-pyrrole.