Hydrogen Peroxide → (1R)-2-phenyl-1-(1,3-thiazol-2-yl)ethanol

HRID 1865705ノート

反応式

HRID 1865705 の反応式
B(Cl)([C@@H]1[C@@H](C)[C@H]2C(C)(C)[C@@H](C2)C1)[C@@H]1[C@@H](C)[C@@H]2C(C)(C)[C@@H](C2)C1.[C:23]1([CH2:29][C:30]([C:32]2[S:33][CH:34]=[CH:35][N:36]=2)=[O:31])[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.[OH-].[Na+].OO>C(OCC)C.O>[C:23]1([CH2:29][C@H:30]([C:32]2[S:33][CH:34]=[CH:35][N:36]=2)[OH:31])[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1

参加物

7

反応物 4

HCID 784Hydrogen PeroxideHCID 14798Sodium HydroxideHCID 109980962-Phenyl-1-(thiazol-2-yl)ethanoneHCID 91873398(+)-b-Chlorodiisopinocamphenylborane

生成物 1

HCID 11084983(1R)-2-phenyl-1-(1,3-thiazol-2-yl)ethanol収率 72%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 3283Diethyl Ether溶媒2 回

反応条件

温度
0 °C

実験手順

Following the method of Itako et al. (Irako, N.; Hamada, Y.; Shioiri, T. Tetrahedron 48(35), 1992, 7251-7264), to a 0° C. (ice-water bath) solution of (+)-B -chlorodiisopinocamphenylborane (+-DIP-Chloride, 3.9 g, 12 mmol) in diethyl ether (3 mL) is added dropwise a solution of 2-phenyl-1-(1,3-thiazol-2-yl)ethanone (0.83 g, 4.1 mmol, from Reference Example 2) in diethyl ether (17 mL). The mixture is stirred for 6 hours at 0° C. and then is allowed to sit in a −5° C. freezer overnight. The next day, 10% aqueous sodium hydroxide solution (10 mL) is added at 0° C. with stirring. Aqueous hydrogen peroxide solution (30%, 1.5 mL) is then added and the mixture is allowed to stir at room temperature for 2 hours. The biphasic mixture is diluted with water (50 mL). The two layers are partitioned and the aqueous phase is saturated with potassium carbonate and then extracted thrice with diethyl ether. The combined extracts are washed with saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a bright golden oil, which is purified by flash chromatography (silica gel, hexanes/ethyl acetate). A light yellow solid (0.60 g, 72%) is provided. MS (ES+): (M+H)=206.0

後処理

  1. waitto sit in a −5° C. freezer overnight
  2. stirringwith stirring
  3. stirringto stir at room temperature for 2 hours
  4. customThe two layers are partitioned
  5. extractionextracted thrice with diethyl ether
  6. washThe combined extracts are washed with saturated aqueous sodium chloride solution
  7. dry with materialdried over anhydrous sodium sulfate
  8. concentrationconcentrated under reduced pressure
  9. customto give a bright golden oil, which
  10. customis purified by flash chromatography (silica gel, hexanes/ethyl acetate)

出典と根拠

ORDレコード
ord-1d36c5526f054fa99ceddc01bfa435b6
出典データセット
uspto-grants-2009_12
特許番号
US07626023B2

反応ノート

読み込み中…