Azobisisobutyronitrile → 3-(Bromomethyl)-1-benzothiophene

HRID 1072597

반응식

HRID 1072597 반응식
[CH3:1][C:2]1[C:3]2[CH:10]=[CH:9][CH:8]=[CH:7][C:4]=2[S:5][CH:6]=1.C1C(=O)N([Br:18])C(=O)C1.N(C(C)(C)C#N)=NC(C)(C)C#N>C(Cl)(Cl)(Cl)Cl>[Br:18][CH2:1][C:2]1[C:3]2[CH:10]=[CH:9][CH:8]=[CH:7][C:4]=2[S:5][CH:6]=1

참가 물질

5

반응물 3

HCID 6547AzobisisobutyronitrileHCID 67184N-bromobutanimideHCID 738173-Methylbenzo[b]thiophene

생성물 1

HCID 112646413-(Bromomethyl)-1-benzothiophene수율 42.2%

시약·촉매·용매 1

HCID 5943Carbon Tetrachloride용매

실험 절차

3-Methylbenzo[b]thiophene (9.9 g, 67 mmol) is heated in carbon tetrachloride (133 ml) to near reflux in the presence of n-bromosuccinimide (11.9 g, 67 mmol, 1.0 eq.). 2,2′Azobisisobutyronitrile (2.2 g, 13.3 mmol, 0.2 eq.) is added and the resulting mixture is refluxed for two hours. After cooling, the reaction mixture is filtered through a glass-fritted funnel, and the filtrate is concentrated. The residue is triturated with petroleum ether and toluene to afford 6.42 g of 3-Bromomethylbenzo[b]thiophene (42%). The title amine is prepared from 3-(bromomethyl)-benzo[B]thiophene in a similar fashion as described in U.S. Pat. No. 4,321,398.

후처리

  1. temperaturethe resulting mixture is refluxed for two hours
  2. temperatureAfter cooling
  3. filtrationthe reaction mixture is filtered through a glass-fritted funnel
  4. concentrationthe filtrate is concentrated
  5. customThe residue is triturated with petroleum ether and toluene

출처 및 근거

ORD 기록
ord-72b57041208a4f0189159b5c6e89268c
출처 데이터셋
uspto-grants-2005_06
특허 번호
US06911463B2

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