(4-Fluoro-2-methylphenyl)boronic acid → 3-(4-Methylthiophenyl)-4-(2-methyl-4-fluorophenyl)thiophene

HRID 1743895노트

반응식

HRID 1743895 반응식
[CH3:1][S:2]([C:5]1[CH:10]=[CH:9][C:8]([C:11]2[C:12]([C:16]3[CH:21]=[CH:20][C:19]([F:22])=[CH:18][CH:17]=3)=[CH:13][S:14][CH:15]=2)=[CH:7][CH:6]=1)(=O)=O.[CH3:23]C1C=C(F)C=CC=1B(O)O>C1(C)C=CC=CC=1.C(=O)([O-])[O-].[Na+].[Na+].C(O)C.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[CH3:1][S:2][C:5]1[CH:10]=[CH:9][C:8]([C:11]2[C:12]([C:16]3[CH:21]=[CH:20][C:19]([F:22])=[CH:18][C:17]=3[CH3:23])=[CH:13][S:14][CH:15]=2)=[CH:7][CH:6]=1

참가 물질

7

반응물 2

HCID 2734665(4-Fluoro-2-methylphenyl)boronic acidHCID 104268843-(4-Methylsulfonylphenyl)-4-(4-fluorophenyl)thiophene

생성물 1

HCID 545620343-(4-Methylthiophenyl)-4-(2-methyl-4-fluorophenyl)thiophene수율 74.2%

시약·촉매·용매 4

HCID 11979704Tetrakis(triphenylphosphine)palladium촉매HCID 702Ethanol용매HCID 1140Toluene용매HCID 10340Sodium Carbonate용매

실험 절차

The mono-substituted thiophene from Example 14 (1.8 mmol, 520 mg) was combined with the 2-methyl-4-fluorophenyl boronic acid (2 eq, 3.6 mmol, 562 mg) in 8.0 ml of toluene, 4.3 ml of 2 M sodium carbonate, 10 ml of ethanol and tetrakis(triphenylphosphine)-palladium(0)(1.0 g) and was stirred at reflux overnight. The reaction was concentrated in vacuo and the residue was partitioned between toluene and water. The toluene layer was dried (MgSO4) and reconcentrated in vacuo. The residue was purified via silica chromatography (Waters, LC-2000) in 97% hexane/ethyl acetate to give 3-(4-methylthiophenyl)-4-(2-methyl-4-fluorophenyl)thiophene (420 mg) as a semi-solid. NMR (CDCl3) δ 1.90(s, 3H), 2.43(s, 3H), 6.8–6.9(m, 2H), 7.05(q, J=8 Hz, 4H), 7.12–7.18(m, 2H), 7.33(d, J=2 Hz, 1H).

후처리

  1. temperatureat reflux overnight
  2. concentrationThe reaction was concentrated in vacuo
  3. customthe residue was partitioned between toluene and water
  4. dry with materialThe toluene layer was dried (MgSO4)
  5. customThe residue was purified via silica chromatography (Waters, LC-2000) in 97% hexane/ethyl acetate

출처 및 근거

ORD 기록
ord-49351749c2164a8e89e8fedbac5cfcbe
출처 데이터셋
uspto-grants-2006_03
특허 번호
US07012094B1

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