Sodium Carbonate → Biphenyl-3-ylacetic acid methyl ester

HRID 31087

반응식

HRID 31087 반응식
[CH3:1][O:2][C:3](=[O:12])[CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[C:7](Br)[CH:6]=1.[C:13]1(B(O)O)[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.C(=O)([O-])[O-].[Na+].[Na+].[Cl-].[NH4+]>C1(C)C=CC=CC=1.CCCCCCC.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.C(OCC)(=O)C.C(OCC)(=O)C.CCCCCCC>[CH3:1][O:2][C:3](=[O:12])[CH2:4][C:5]1[CH:6]=[C:7]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[CH:8]=[CH:9][CH:10]=1

참가 물질

10

반응물 4

HCID 10340Sodium CarbonateHCID 25517Ammonium ChlorideHCID 66827Phenylboronic AcidHCID 11746402Methyl 2-(3-bromophenyl)acetate

생성물 1

HCID 10751722Biphenyl-3-ylacetic acid methyl ester

시약·촉매·용매 5

HCID 178418397HCID 178418397, 화합물촉매HCID 1140Toluene용매HCID 8857Ethyl Acetate용매HCID 8900Heptane용매HCID 21899848Ethylacetate heptane용매

실험 절차

Concentrated sulphuric acid (588 μL) was added to a solution of 3-bromophenyl acetic acid (10 g, 46.5 mmol) in methanol (100 mL). The mixture was refluxed for 1.5 h and then cooled to ambient temperature and evaporated under reduced pressure to afford a residue. The residue was redissolved in diethyl ether (500 mL), washed with water (2×100 mL), brine (100 mL), dried (MgSO4) and then evaporated under reduced pressure to afford 3-bromophenyl acetic acid methyl ester (10.65 g). The 3-bromophenyl acetic acid methyl ester was dissolved in toluene (17 mL) then phenyl boronic acid (6.8 g, 55.69 mmol) added, followed by a aqueous solution of sodium carbonate (93 mL, 2M) and tetrakis(triphenylphosphine)palladium (1.6 g, 1.41 mmol). The mixture was stirred overnight then cooled to ambient temperature and an aqueous solution of saturated ammonium chloride (100 mL) added. The mixture was extracted with ethyl acetate (2×200 mL), died (Na2SO4) and evaporated under reduced pressure to afford a residue. Flash chromatography of the residue over silica (200 g) using ethyl acetate:heptane (3:48) as the eluent gave biphenyl-3-yl acetic acid methyl ester, yield 10.5 g, (99%), TLC (single UV spot, Rf=0.24, 10% ethyl acetate in heptane), analytical HPLC Rt=19.55 min, HPLC-MS (single main UV peak with Rt=9.35 min, 227.1 [M+H]+).

후처리

  1. extractionThe mixture was extracted with ethyl acetate (2×200 mL)
  2. customevaporated under reduced pressure
  3. customto afford a residue

출처 및 근거

ORD 기록
ord-1ae2ad4e41b745e799789b67320e2b9a
출처 데이터셋
uspto-grants-2008_09
특허 번호
US07425562B2

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