Potassium Hydroxide → Ethyl 2-[3-(3-bromophenyl)oxetan-3-yl]acetate

HRID 1920865ノート

反応式

HRID 1920865 の反応式
[OH-].[K+].[O:3]1[CH2:6][C:5](=[CH:7][C:8]([O:10][CH2:11][CH3:12])=[O:9])[CH2:4]1.[Br:13][C:14]1[CH:15]=[C:16](B(O)O)[CH:17]=[CH:18][CH:19]=1>O1CCOCC1.[Cl-].[Na+].O>[Br:13][C:14]1[CH:19]=[C:18]([C:5]2([CH2:7][C:8]([O:10][CH2:11][CH3:12])=[O:9])[CH2:6][O:3][CH2:4]2)[CH:17]=[CH:16][CH:15]=1

参加物

6

反応物 3

HCID 14797Potassium HydroxideHCID 2734318(3-Bromophenyl)boronic acid2 回HCID 53308471Ethyl 2-(oxetan-3-ylidene)acetate

生成物 1

HCID 57969689Ethyl 2-[3-(3-bromophenyl)oxetan-3-yl]acetate収率 71.3%

試薬・触媒・溶媒 2

HCID 312751,4-Dioxane溶媒2 回HCID 57417360Sodium chloride; water溶媒

実験手順

To a solution of [Rh(cod)Cl]2 (171.3 mg, 0.3518 mmol) in 30 mL of dioxane was added aqueous KOH (6.097 mL of 1.5 M, 9.145 mmol) followed by ethyl 2-(oxetan-3-ylidene)acetate (1 g, 7.035 mmol) and a solution of (3-bromophenyl)boronic acid (2.119 g, 10.55 mmol) in 10 mL of dioxane. The reaction was stirred for 30 minutes at room temperature then further (3-bromophenyl)boronic acid (706 mg, 0.5 eq) was added and the reaction stirred overnight. Brine was added and the aqueous layer extracted twice with ethyl acetate. The combined organics were washed with brine and then dried, filtered and concentrated under reduced pressure. The crude product was purified on silica (Companion, 80 g) eluting with 1-20% EtOAc:Petrol ether to give ethyl 2-[3-(3-bromophenyl)oxetan-3-yl]acetate as a yellow oil (1.50 g, 71%).

後処理

  1. stirringthe reaction stirred overnight
  2. extractionthe aqueous layer extracted twice with ethyl acetate
  3. washThe combined organics were washed with brine
  4. customdried
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe crude product was purified on silica (Companion, 80 g)
  8. washeluting with 1-20% EtOAc

出典と根拠

ORDレコード
ord-150bda362efe4cc884559b00351d25a9
出典データセット
uspto-grants-2012_05
特許番号
US08173635B2

反応ノート

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