Thiophene → Ethyl (E)-4-[2-(5,5-dimethyl-8-(2-thienyl)-5,6-dihydronaphthalen-2-yl)ethenyl]-benzoate

HRID 24569

反応式

HRID 24569 の反応式
[S:1]1[CH:5]=[CH:4][CH:3]=[CH:2]1.C([Li:10])CCC.[CH3:11][C:12]1([CH3:43])[CH2:21][CH:20]=[C:19](OS(C(F)(F)F)(=O)=O)[C:18]2[CH:17]=[C:16](/[CH:30]=[CH:31]/[C:32]3[CH:42]=[CH:41][C:35]([C:36]([O:38][CH2:39][CH3:40])=[O:37])=[CH:34][CH:33]=3)[CH:15]=[CH:14][C:13]1=2>O1CCCC1.[Cl-].[Zn+2].[Cl-].C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Li:10][C:2]1[S:1][CH:5]=[CH:4][CH:3]=1.[CH3:43][C:12]1([CH3:11])[CH2:21][CH:20]=[C:19]([C:2]2[S:1][CH:5]=[CH:4][CH:3]=2)[C:18]2[CH:17]=[C:16](/[CH:30]=[CH:31]/[C:32]3[CH:33]=[CH:34][C:35]([C:36]([O:38][CH2:39][CH3:40])=[O:37])=[CH:41][CH:42]=3)[CH:15]=[CH:14][C:13]1=2

参加物

8

反応物 3

HCID 8030ThiopheneHCID 19695065ethyl (E)-4-[2-(5,5-dimethyl-8-(trifluoromethylsulfonyl)oxy-5,6-dihydronaphthalen-2-yl)ethenyl]benzoateHCID 178418339Butyllithium

生成物 2

HCID 15887383Ethyl (E)-4-[2-(5,5-dimethyl-8-(2-thienyl)-5,6-dihydronaphthalen-2-yl)ethenyl]-benzoateHCID 178418439HCID 178418439、化合物

試薬・触媒・溶媒 3

HCID 3007855Zincchloride触媒HCID 178418397HCID 178418397、化合物触媒HCID 8028Tetrahydrofuran溶媒3 回

反応条件

温度
-78 °C

実験手順

A solution of lithiothiophene was prepared by the addition of 0.10 g (0.095 mL, 1.2 mmol) of thiophene to a cold solution (−78° C.) of 0.61 g (0.90 mL, 1.4 mmol, 1.6 M in hexanes) of n-butyl lithium in 2.0 mL of tetrahydrofuran. The solution was stirred at −78° C. for 35 min and then a solution of 0.158 g (1.2 mmol) of zinc chloride in 2.0 mL of tetrahydrofuran was added. The resulting solution was stirred at −78° C. to room temperature for 1 h and then the organozinc was added via cannula to a mixture of 0.212 g (0.44 mmol) of ethyl (E)-4-[2-(5,5-dimethyl-8-(trifluoromethylsulfonyl)oxy-5,6-dihydronaphthalen-2-l)ethenyl] benzoate (Compound A9) and 18 mg (0.016 mmol) of tetrakis(triphenylphosphine)palladium(0) in 2.0 mL of tetrahydrofuran. The resulting mixture was stirred at room temperature for 10 min and then heated at 50° C. for 1 h. The reaction was quenched by the addition of sat. aqueous NH4Cl. The mixture was extracted with EtOAc (2×), and washed with brine. The organic phase was dried over Na2SO4 and then concentrated in vacuo. The crude material product was purified by flash chromatography (silica, 15% ethyl acetate in hexanes) to afford the title compound as a solid.

後処理

  1. stirringThe resulting solution was stirred at −78° C. to room temperature for 1 h
  2. stirringThe resulting mixture was stirred at room temperature for 10 min
  3. temperatureheated at 50° C. for 1 h
  4. customThe reaction was quenched by the addition of sat. aqueous NH4Cl
  5. extractionThe mixture was extracted with EtOAc (2×)
  6. washwashed with brine
  7. dry with materialThe organic phase was dried over Na2SO4
  8. concentrationconcentrated in vacuo
  9. customThe crude material product was purified by flash chromatography (silica, 15% ethyl acetate in hexanes)

出典と根拠

ORDレコード
ord-4ce7c23667ed4c469af66e055671ecc8
出典データセット
uspto-grants-2005_02
特許番号
US06855832B2

関連ノート

読み込み中…