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CAS No. : | 1427195-21-8 | MDL No. : | MFCD24107265 |
Formula : | C9H8FIO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | FTRYNGLCYMHWKJ-UHFFFAOYSA-N |
M.W : | 294.06 | Pubchem ID : | 81430470 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313 | UN#: | |
Hazard Statements: | H315-H319 | Packing Group: | |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: palladium 10% on activated carbon; hydrogen / methanol / 12 h / 2327.23 Torr / Autoclave 2: isopentyl nitrite; copper(l) iodide / acetonitrile / 2 h / -5 - 65 °C | ||
Multi-step reaction with 2 steps 1.1: palladium 10% on activated carbon; hydrogen / 12 h / 2327.23 Torr 2.1: isopentyl nitrite; copper(l) iodide / acetonitrile / 0.08 h / -5 °C 2.2: 2 h / -5 - 65 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
20 g | With copper(l) iodide; isopentyl nitrite; In acetonitrile; at -5 - 65℃; for 2h; | To a stirred solution of I-1-3 (26 g, 142 mmol) in acetonitrile (540 mL) at -5 C. is dropwise added isoamyl nitrite (21.7 g, 184 mmol). After 5 min, copper (I) iodide (56 g, 369 mmol) is added portion wise to the reaction mixture and the resultant mixture is slowly heated to 65 C. for 2 h. The solution is filtered through celite and the filtrate is concentrated under reduced pressure. Flash column chromatography (silical gel, eluent with 5% ethyl acetate in hexane) yields 20 g of methyl 2-fluoro-5-iodo-4-methyl-benzoate (I-1-4). |
20 g | To a stirred solution of 1-1-3 (26 g, 142 mmol) in acetonitrile (540 mE) at -5 C. is dropwise added isoamyl nitrite (21.7 g, 184 mmol).After 5mm copper (I) iodide (56 g, 369 mmol) is added portion wise to the reaction mixture and the resultant mixture is slowly heated to 65 C. for 2 h. The solution is filtered through celite and the filtrate is concentrated under reduced pressure. Flash column chromatography (silical gel, eluent with 5% ethyl acetate in hexane) yields 20 g of methyl 2-fluoro-5-iodo-4-methyl- benzoate (1-1-4). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With water; sodium hydroxide In tetrahydrofuran; methanol at 20℃; for 3h; | To a stirred solution of I-1-4 (20 g, 68 mmol) in THF:MeOH: H2O (1:1:1, 300 mL) is added solid NaOH (4 g, 102 mmol) at room temperature. The resultant solution is stirred for 3 h at room temperature. The solvent is concentrated under reduced pressure and the residue is diluted with water (500 mL) and washed with ethyl acetate (2×150 mL). The pH of the aqueous layer is adjusted to pH 2 by addition of 10% aqueous HCl and then extracted with DCM (3×150 mL). The combined organic layer is washed with water (2×100 mL), brine (200 mL), dried over anhydrous MgSO4, filtered and concentrated under reduced pressure to afford 2-fluoro-5-iodo-4-methyl-benzoic acid (I-1A). | |
With water; sodium hydroxide In tetrahydrofuran; methanol at 20℃; for 3h; | Synthesis of 2-fluoro-5-iodo-4-methyl-benzoic acid(I-1) To a stirred solution of 1-1-4 (20 g, 68 mmol) in TRF: MeOR: R20 (1:1:1, 300 mE) is added solid NaOR (4 g, 102 mmol) at room temperature. The resultant solution is stirred for 3 h at room temperature. The solvent is concenSOCl trated under reduced pressure and the residue is diluted with water (500 mE) and washed with ethyl acetate (2x1 50 mE). The pR of the aqueous layer is adjusted to pR 2 by addition of 10% aqueous HC1 and then extracted with DCM (3x1 50 mE). The combined organic layer is washed with water (2x100 mE), brine (200 mE), dried over anhydrous MgSO4, filtered and concentrated under reduced pressure to afford 2-fluoro-5-iodo-4-methyl-benzoic acid (I-i). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: N,O-dimethylhydroxylamine*hydrochloride / tetrahydrofuran; diethyl ether / 0 - 30 °C 2: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 - 30 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: N,O-dimethylhydroxylamine*hydrochloride / tetrahydrofuran; diethyl ether / 0 - 30 °C 2: tetrabutyl ammonium fluoride / tetrahydrofuran / 0 - 30 °C 3: potassium acetate; dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2 / 1,4-dioxane / 105 °C / Inert atmosphere; Sealed tube |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
61% | With N,O-dimethylhydroxylamine*hydrochloride In tetrahydrofuran; diethyl ether at 0 - 30℃; | 53.1 Step 1. l-(2-fluoro-5-iodo-4-methylphenyl)ethan-l-one To a 0 °C solution of methyl 2-fluoro-5-iodo-4-methylbenzoate (300 mg, 1.02 mmol) and , O-dimethylhydroxylamine hydrochloride (119 mg, 1.22 mmol) in anhydrous THF (5 ml) was added methylmagnesium bromide 3M in Et20 (2.0 ml, 6.1 mmol) and the solution was allowed to gradually warm to ambient temperture while stirring overnight. The reaction mixture was cooled to 0 °C prior to quenching with saturated ammonium chloride (aq). The reaction mixture was diluted with ethyl acetate (20 mL) and water (3 mL). The layers were separated and the organic layer was washed with water (3 x 3 mL) and the combined aqueous phases were extracted with ethyl acetate (5 mL). The combined organic layers were washed with brine (5 mL), dried over Na2S04, filtered and concentrated in vacuo. The crude product was purified by CombiFlash chromatography (40 g silica gel column, eluting with 0-20% ethyl acetate/ hexanes) to afford the desired product (174 mg, 61% yield). NMR (400 MHz, CDC13) δ 8.27-8.31 (m, 1H), 7.00 (dt, J= 11.6, 3.6 Hz, 1H), 2.62 (bs, 3H), 2.47 (bs, 3H). |
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