p-Toluenesulfonic acid monohydrate → 5-Bromo-7-[2-(2,2-dimethyl-4-trifluoromethyl-[1,3]dioxolan-4-yl)-1,1-dimethylethyl]-2,3-dihydrobenzofuran

HRID 2106038노트

반응식

HRID 2106038 반응식
[Br:1][C:2]1[CH:3]=[C:4]([C:11]([CH3:22])([CH3:21])[CH2:12][C:13]([C:17]([F:20])([F:19])[F:18])([OH:16])[CH2:14][OH:15])[C:5]2[O:9][CH2:8][CH2:7][C:6]=2[CH:10]=1.O.[C:24]1(C)[CH:29]=CC(S(O)(=O)=O)=C[CH:25]=1>CC(C)=O>[Br:1][C:2]1[CH:3]=[C:4]([C:11]([CH3:22])([CH3:21])[CH2:12][C:13]2([C:17]([F:20])([F:18])[F:19])[CH2:14][O:15][C:24]([CH3:29])([CH3:25])[O:16]2)[C:5]2[O:9][CH2:8][CH2:7][C:6]=2[CH:10]=1

참가 물질

4

반응물 2

HCID 521998p-Toluenesulfonic acid monohydrateHCID 578098304-(5-Bromo-2,3-dihydrobenzofuran-7-yl)-4-methyl-2-trifluoromethylpentane-1,2-diol

생성물 1

HCID 578099225-Bromo-7-[2-(2,2-dimethyl-4-trifluoromethyl-[1,3]dioxolan-4-yl)-1,1-dimethylethyl]-2,3-dihydrobenzofuran수율 372.1%

시약·촉매·용매 1

HCID 180Acetone용매

실험 절차

A mixture of 7.6 g (20 mmol) of 4-(5-bromo-2,3-dihydrobenzofuran-7-yl)-4-methyl-2-trifluoromethylpentane-1,2-diol and 0.754 g (4 mmol) of p-toluenesulfonic acid monohydrate in 200 mL of acetone was stirred at room temperature for 6 days and the volatiles removed in vacuo. The residue was dissolved in EtOAc, washed with saturated aqueous sodium bicarbonate, dried over magnesium sulfate, and concentrated in vacuo. The residue was extracted with diethyl ether and the filtrate concentrated in vacuo to afford 6.3 g (75%) of 5-bromo-7-[2-(2,2-dimethyl-4-trifluoromethyl-[1,3]dioxolan-4-yl)-1,1-dimethylethyl]-2,3-dihydrobenzofuran.

후처리

  1. customthe volatiles removed in vacuo
  2. dissolutionThe residue was dissolved in EtOAc
  3. washwashed with saturated aqueous sodium bicarbonate
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated in vacuo
  6. extractionThe residue was extracted with diethyl ether
  7. concentrationthe filtrate concentrated in vacuo

출처 및 근거

ORD 기록
ord-72d674eedc8046e090b45209707e79fd
출처 데이터셋
uspto-grants-2009_08
특허 번호
US07579469B2

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