Boron tribromide → (E)-methyl 3-(5-((6-hydroxy-2-(4-hydroxyphenyl)benzo[b]thiophen-3-yl)oxy)pyridin-2-yl)acrylate

HRID 332899ノート

反応式

HRID 332899 の反応式
C[O:2][C:3]1[CH:4]=[CH:5][C:6]2[C:10]([O:11][C:12]3[CH:13]=[CH:14][C:15](/[CH:18]=[CH:19]/[C:20]([O:22][CH3:23])=[O:21])=[N:16][CH:17]=3)=[C:9]([C:24]3[CH:29]=[CH:28][C:27]([O:30]C)=[CH:26][CH:25]=3)[S:8][C:7]=2[CH:32]=1.B(Br)(Br)Br>C(Cl)Cl>[OH:2][C:3]1[CH:4]=[CH:5][C:6]2[C:10]([O:11][C:12]3[CH:13]=[CH:14][C:15](/[CH:18]=[CH:19]/[C:20]([O:22][CH3:23])=[O:21])=[N:16][CH:17]=3)=[C:9]([C:24]3[CH:25]=[CH:26][C:27]([OH:30])=[CH:28][CH:29]=3)[S:8][C:7]=2[CH:32]=1

参加物

4

反応物 2

HCID 25134Boron tribromideHCID 86730673HCID 86730673、化合物

生成物 1

HCID 136341396(E)-methyl 3-(5-((6-hydroxy-2-(4-hydroxyphenyl)benzo[b]thiophen-3-yl)oxy)pyridin-2-yl)acrylate

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

To a solution of (E)-methyl 3-(5-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)pyridin-2-yl)acrylate (0.096 g, 0.215 mmol) in DCM (2.145 mL) at room temperature was added BBr3 (1.0 M in heptane, 0.858 mL, 0.86 mmol) and the reaction was stirred at room temperature for 30 min. Upon completion the reaction was quenched with MeOH (2.0 mL) and stirred for 10 min at room temperature then concentrated in vacuo onto silica gel then purified by column chromatography (SiO2, 0-20% MeOH/DCM) to afford (E)-methyl 3-(5-((6-hydroxy-2-(4-hydroxyphenyl)benzo[b]thiophen-3-yl)oxy)pyridin-2-yl)acrylate. LC/MS (m/z, MH+): 420.3.

後処理

  1. customUpon completion the reaction was quenched with MeOH (2.0 mL)
  2. stirringstirred for 10 min at room temperature
  3. concentrationthen concentrated in vacuo onto silica gel
  4. customthen purified by column chromatography (SiO2, 0-20% MeOH/DCM)

出典と根拠

ORDレコード
ord-7161f2460b364bf1a91600f5f97d06c2
出典データセット
uspto-grants-2014_11
特許番号
US08877801B2

反応ノート

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