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Sodium Carbonate → HCID 59337631、化合物

HRID 12251
ノート
印刷プレビュー

反応式

HRID 12251 の反応式
[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]
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

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

生成物 1

HCID 59337631HCID 59337631、化合物収率 25%

試薬・触媒・溶媒 1

HCID 80711,2-Dimethoxyethane溶媒

反応条件

温度
90 °C

実験手順

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)

後処理

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

出典と根拠

ORDレコード
ord-8f1b7bacbef04f158bc05613acb1e601
出典データセット
uspto-grants-2010_06
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US07727992B2

反応ノート

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