Methyl Acrylate → Methyl beta-hydroxy-alpha-methylene-2-pyridinepropanoate

HRID 1026503ノート

反応式

HRID 1026503 の反応式
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[CH:7]=[O:8].[C:9]([O:13][CH3:14])(=[O:12])[CH:10]=[CH2:11]>N12CCN(CC1)CC2.C(Cl)(Cl)Cl>[OH:8][CH:7]([C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][N:1]=1)[C:10](=[CH2:11])[C:9]([O:13][CH3:14])=[O:12]

参加物

5

反応物 2

HCID 7294Methyl AcrylateHCID 142732-Pyridinecarboxaldehyde

生成物 1

HCID 11008779Methyl beta-hydroxy-alpha-methylene-2-pyridinepropanoate収率 60%

試薬・触媒・溶媒 2

HCID 9237Dabco触媒HCID 6212Chloroform溶媒

実験手順

A 250-mL single-neck round-bottomed flask was charged with chloroform (100 mL), picolinaldehyde (10.7 g, 0.10 mol), methyl acrylate (8.60 g, 0.10 mol), and 1,4-diazabicyclo[2.2.2]octane (0.560 g, 5.00 mmol). The reaction mixture stirred at room temperature for 48 h. After this time the reaction was concentrated under reduced pressure and the residue was purified by silica-gel column chromatography eluting with 3:1 petroleum ether/ethyl acetate to afford 127a as a dark yellow oil (11.6 g, 60%). MS-ESI: (M+H)+ 194.2. 1H NMR (500 MHz, CDCl3) δ 8.54 (d, J=5.0 Hz, 1H), 7.69-7.66 (m, 1H), 7.42 (d, J=8.0 Hz, 1H), 7.22-7.20 (m, 1H), 6.36 (s, 1H), 5.97 (s, 1H), 5.62 (s, 1H), 4.85 (s, 1H), 3.74 (s, 3H).

後処理

  1. concentrationAfter this time the reaction was concentrated under reduced pressure
  2. customthe residue was purified by silica-gel column chromatography
  3. washeluting with 3:1 petroleum ether/ethyl acetate

出典と根拠

ORDレコード
ord-1f1a1c90c172410eb8b6116273462696
出典データセット
uspto-grants-2014_05
特許番号
US08729072B2

反応ノート

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