反応式
[F:1][B-:2]([F:5])([F:4])[F:3].[NH+]1C=CC=CC=1.[CH3:12][N:13]([CH3:19])/[CH:14]=[CH:15]/[C:16](=[O:18])[CH3:17].[CH3:20][N:21]([CH3:26])[CH:22]=[CH:23][CH:24]=O>C(OC(=O)C)(=O)C.C(O)(=O)C>[F:1][B-:2]([F:5])([F:4])[F:3].[CH3:12][N:13]([CH3:19])[CH:14]=[C:15]([C:16](=[O:18])[CH3:17])[CH:24]=[CH:23][CH:22]=[N+:21]([CH3:26])[CH3:20]参加物
5
反応条件
- 温度
- 0 °C
実験手順
Pyridinium tetrafluoroborate (2.21 g, 13.3 mmol) was added to a solution of (3E)-4-(dimethylamino)-3-buten-2-one (1.54 ml, 13.3 mmol) in 13.5 ml acetic anhydride/acetic acid (2:1). The resulting suspension was cooled to 0° C. and 3-dimethylaminoacroleine (1.33 ml, 13.3 mmol) was added over a period of 1 h under vigorous stirring and cooling with an ice bath receiving a red-brown precipitate. The cool reaction mixture was filtered and the remaining solid was washed with diethylether several times and dried under reduced pressure. The pentamethinium salt was obtained as orange crude product (2.69 g, 96%) and was used without any further purification.
後処理
- temperaturecooling with an ice bath
- customThe cool reaction mixture
- filtrationwas filtered
- washthe remaining solid was washed with diethylether several times
- customdried under reduced pressure
出典と根拠
- ORDレコード
- ord-cd552ca6e27549e988c610e8cce96ebb
- 出典データセット
- uspto-grants-2014_06
- 特許番号
- US08754111B2
関連ノート
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