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Sodium Carbonate → HCID 59337631, 화합물

HRID 12251
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HRID 12251 반응식
[CH3:1][O:2][C:3](=[O:24])[C:4]1[C:9]([F:10])=[C:8](B2OC(C)(C)C(C)(C)O2)[CH:7]=[C:6]([N+:20]([O-:22])=[O:21])[C:5]=1[NH2:23].[CH3:25][N:26]1[CH:31]=[CH:30][C:29](OS(C(F)(F)F)(=O)=O)=[CH:28][C:27]1=[O:40].[Cl-].[Li+].C(=O)([O-])[O-].[Na+].[Na+]>COCCOC>[CH3:1][O:2][C:3](=[O:24])[C:4]1[C:9]([F:10])=[C:8]([C:29]2[CH:30]=[CH:31][N:26]([CH3:25])[C:27](=[O:40])[CH:28]=2)[CH:7]=[C:6]([N+:20]([O-:22])=[O:21])[C:5]=1[NH2:23]
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HCID 10340Sodium CarbonateHCID 433294Lithium ChlorideHCID 59337628Methyl 2-amino-6-fluoro-3-nitro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoateHCID 59337641Trifluoro-methanesulfonic acid 1-methyl-2-oxo-1,2-dihydro-pyridin-4-yl ester

생성물 1

HCID 59337631HCID 59337631, 화합물수율 25%

시약·촉매·용매 1

HCID 80711,2-Dimethoxyethane용매

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온도
90 °C

실험 절차

To a solution of 2-amino-5-bromo-6-fluoro-3-nitro-benzoic acid methyl ester (1.0 g, 3.4 mmol) in dioxane (25 mL), under nitrogen atmosphere, was added bispinacoladaboron (1.3 g, 5.1 mmol), dichloro[1,1′-bis(diphenylphosphine)ferrocene]palladium (II) dichlormethane adduct (0.125 g, 0.17 mmol), and potassium acetate (1.0 g, 10.2 mmol). The resulting mixture was heated at reflux for 18 hours, cooled to room temperature, diluted with ethyl acetate (50 ml) and filtered through Celite®. The resulting solid was triturated with hexanes (40 ml) three times to afford 0.515 g of 2-amino-6-fluoro-3-nitro-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzoic acid methyl ester. To a mixture of 2-amino-6-fluoro-3-nitro-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzoic acid methyl ester in ethylene glycol dimethyl ether (10 ml) was added trifluoro-methanesulfonic acid 1-methyl-2-oxo-1,2-dihydro-pyridin-4-yl ester (0.39 g, 1.5 mmol), lithium chloride (0.25 g, 6.0 mmol), sodium carbonate (1.1 ml, 2.2 mmol of 2M), and tetrakistriphenylphosphine palladium (0.18 g, 0.15 mmol). The resulting mixture was heated to 90° C. and allowed to stir for 18 hours. After cooling and concentration in vacuo, the residue was purified by chromatography (Silica Gel 0.5% methanol/dichloromethane to 2% methanol/dichloromethane) to provide the title compound (0.275 g, 25%). 1H NMR (500 MHz, CDCl3) δ 3.58 (s, 3H), 4.03 (s, 3H), 6.30 (d, 1H), 7.32 (d, 1H), 8.45 (br s, 2H), 8.53 (d, 1H)

후처리

  1. temperatureAfter cooling
  2. concentrationconcentration in vacuo
  3. customthe residue was purified by chromatography (Silica Gel 0.5% methanol/dichloromethane to 2% methanol/dichloromethane)

출처 및 근거

ORD 기록
ord-8f1b7bacbef04f158bc05613acb1e601
출처 데이터셋
uspto-grants-2010_06
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US07727992B2

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