Carbon tetrabromide → 3-Bromo-5-(bromomethyl)pyridine
反応式
[Br:1][C:2]1[CH:3]=[C:4]([CH2:8]O)[CH:5]=[N:6][CH:7]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(Br)(Br)(Br)[Br:30]>C(Cl)Cl>[Br:1][C:2]1[CH:7]=[N:6][CH:5]=[C:4]([CH2:8][Br:30])[CH:3]=1参加物
5
反応条件
- 温度
- 0 °C
実験手順
(5-bromopyridin-3-yl)methanol (475 mg, 2.5 mmol) and triphenylphosphine (1.3 g, 5 mmol) were combined in methylene chloride (20 mL) and cooled to 0° C. carbon tetrabromide (927 mg, 2.8 mmol) was introduced in portions and the reaction was maintained at 0° C. for 1 h. The reaction was concentrated and purified by column chromatography on silica gel (0 to 50% ethyl acetate/hexanes) to produce 254 mg (41%) as a white solid. 1H-NMR (D6DMSO, 400 MHz) δ 8.65 (s, br, 2H), 8.18 (s, 1H), 4.73 (s, 2H). Mass spec.: 249.89 (MH)+.
後処理
- additionwas introduced in portions
- concentrationThe reaction was concentrated
- custompurified by column chromatography on silica gel (0 to 50% ethyl acetate/hexanes)
- customto produce 254 mg (41%) as a white solid
出典と根拠
- ORDレコード
- ord-38fdae6145ca4fc8832b970b235ba9f7
- 出典データセット
- uspto-grants-2011_12
- 特許番号
- US08071778B2
反応ノート
読み込み中…