Boron tribromide → 5-[4-(2-Hydroxy-phenyl)-5-methyl-oxazol-2-yl]-pentanoic acid methyl ester

HRID 1443744ノート

反応式

HRID 1443744 の反応式
[CH3:1][O:2][C:3](=[O:22])[CH2:4][CH2:5][CH2:6][CH2:7][C:8]1[O:9][C:10]([CH3:21])=[C:11]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=2[O:19]C)[N:12]=1.B(Br)(Br)Br>C(Cl)Cl>[CH3:1][O:2][C:3](=[O:22])[CH2:4][CH2:5][CH2:6][CH2:7][C:8]1[O:9][C:10]([CH3:21])=[C:11]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=2[OH:19])[N:12]=1

参加物

4

反応物 2

HCID 25134Boron tribromideHCID 591677855-[4-(2-Methoxy-phenyl)-5-methyl-oxazol-2-yl]-pentanoic acid methyl ester

生成物 1

HCID 684911055-[4-(2-Hydroxy-phenyl)-5-methyl-oxazol-2-yl]-pentanoic acid methyl ester

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

Dissolve 5-[4-(2-methoxy-phenyl)-5-methyl-oxazol-2-yl]-pentanoic acid methyl ester (3.5 g, 11.5 mmol) in CH2Cl2 (50 mL) under nitrogen at RT. Add boron tribromide (1M in CH2Cl2, 29 mL) and stir at RT until the reaction is complete. Quench the mixture into ice/water and extract with CH2Cl2. Dry the combined extracts over Na2SO4 and concentrate. Chromatograph the resulting residue over silica gel (MeOH/CH2Cl2) to allow for isolation of 5-[4-(2-hydroxy-phenyl)-5-methyl-oxazol-2-yl]-pentanoic acid methyl ester (2.61 g, 78%). MS (ES): (M+1)+ 290.2 m/z.

後処理

  1. customQuench the mixture into ice/water
  2. extractionextract with CH2Cl2
  3. dry with materialDry the combined extracts over Na2SO4
  4. concentrationconcentrate

出典と根拠

ORDレコード
ord-81a8ec246f8543febac4ed3f38d0126c
出典データセット
uspto-grants-2010_02
特許番号
US07662771B2

反応ノート

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