反応式
[CH3:1][C:2]1[N:11]=[C:10]([C:12]([F:15])([F:14])[F:13])[CH:9]=[CH:8][C:3]=1[C:4]([O:6][CH3:7])=[O:5].[Br:16]N1C(=O)CCC1=O>C(Cl)(Cl)(Cl)Cl>[Br:16][CH2:1][C:2]1[N:11]=[C:10]([C:12]([F:15])([F:13])[F:14])[CH:9]=[CH:8][C:3]=1[C:4]([O:6][CH3:7])=[O:5]参加物
実験手順
50 g (0.23 mol) of methyl 2-methyl-6-trifluoromethylnicotinate and 49 g (0.28 mol) of N-bromosuccinimide are heated for 90 minutes at 50° C. in 500 ml of carbon tetrachloride in the presence of a catalytic amount of α,α-azaisobutyronitrile with illumination by a 150 watt lamp. Precipitated succinimide is filtered off, and the product methyl 2-bromomethyl-6-trifluoromethylnicotinate is then isolated as main component by means of column chromatography (mobile phase ethyl acetate/hexane 1:15), 1H-NMR (CDCl3): 4.01, s, 3H; 5.03, s, 2H; 7.72, d (J 8.2 Hz), 1H; 8.43 ppm, d, (J 8.2 Hz), 1H. 25.6 g (35 mmol) of the above product are taken up in toluene and treated with 10.6 g (40 mmol) of triphenylphosphine. After the mixture has been heated for 2 hours at boiling point, pure (3-methoxycarbonyl-6-trifluoromethylpyridine-2-ylmethyl)triphenylphosphonium bromide of melting point 215-217° C. crystallizes out upon cooling.
後処理
- filtrationPrecipitated succinimide is filtered off
出典と根拠
- ORDレコード
- ord-bf40323cc2114fcab2553ad5a5be5c54
- 出典データセット
- uspto-grants-2003_03
- 特許番号
- US06534445B1
関連ノート
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