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Chemical Structure| 691904-77-5
Chemical Structure| 691904-77-5
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CAS No. :691904-77-5 MDL No. :MFCD18396469
Formula : C12H15FO3 Boiling Point : -
Linear Structure Formula :- InChI Key :-
M.W : 226.24 Pubchem ID :-
Synonyms :

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Application In Synthesis of [ 691904-77-5 ]

* 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.

  • Downstream synthetic route of [ 691904-77-5 ]

[ 691904-77-5 ] Synthesis Path-Downstream   1~9

  • 1
  • [ 691904-76-4 ]
  • [ 691904-77-5 ]
YieldReaction ConditionsOperation in experiment
90% With hydrogen In ethanol 34 Preparation 34Ethyl 3-(2-fluoro-4-methox-phenyl)propanoateA mixture of ethyl (E)-3-(2-fluoro-4-methoxy-phenyl)prop-2-enoate (11 g, 49 mmol) and 10% Pd/C catalyst (1.1 g) in ethanol (120 mL) is stirred overnight under hydrogen atmosphere with a balloon. The mixture is filtered through diatomaceous earth, washed with ethanol and the filtrate is evaporated to dryness to give the title compound (10 g, 90%). 1H NMR (400 MHz, DMSO-d6) δ 7.17 (t, J=8.8 Hz, 1H), 6.74 (d, J=12.4 Hz, 1H), 6.69 (d, J=8.4 Hz, 1H), 4.02 (q, J=7.2 Hz, 2H), 3.71 (s, 3H), 2.77 (t, J=7.6 Hz, 2H), 2.53 (t, J=7.6 Hz, 2H), 1.13 (t, J=7.2 Hz, 3H).
84% With hydrogen In tetrahydrofuran; ethanol at 10 - 35℃; 24 Reference Example 24 Reference Example 24 ethyl 3-(2-fluoro-4-methoxyphenyl)-propanoate A mixture of ethyl (2E)-3-(2-fluoro-4-methoxyphenyl)-acrylate (7.07 g, 31.5 mmol), tetrahydrofuran (50 mL), ethanol (5 mL) and platinum dioxide (300 mg) was stirred overnight under a hydrogen atmosphere at room temperature. The catalyst was filtered off and the filtrate was concentrated. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=4:1) to give the title compound (5.97 g, yield 84%) as a colorless oil. 1H NMR (CDCl3) δ1.23(3H,t,J=7.2Hz), 2.58(2H,t,J=7.6Hz), 2.90(2H,t,J=7.6Hz), 3.77(3H,s), 4.12(2H,q,J=7.2Hz), 6.57-6.63(2H,m), 7.07-7.13(1H,m).
84% With hydrogen In tetrahydrofuran; ethanol at 20℃; 28 A mixture of ethyl (2E)-3-(2-fluoro-4-methoxyphenyl)acrylate (7.07 g, 31.5 mmol), tetrahydrofuran (50 mL), ethanol (5 mL) and platinum oxide (300 mg) was stirred overnight at room temperature under a hydrogen atmosphere. The catalyst was filtered off, and the filtrate was concentrated. The residue was purified by silica gel column chromatography (20% ethyl acetate/hexane) to give the title compound (5.97 g, yield 84%) as a colorless oil. 1H NMR (CDCl3) δ: 1.23(3H, t, J=7.2Hz), 2.58(2H, t, J=7. 6Hz), 2.90(2H, t, J=7.6Hz), 3.77(3H, s), 4.12(2H, q, J=7.2Hz), 6.57-6.63(2H, m), 7.07-7.13(1H, m).
84% With hydrogen In tetrahydrofuran; ethanol at 20℃; 13 ethyl 3- (2-fluoro-4-methoxyphenyl) propanoate A mixture of ethyl (2E)-3- (2-fluoro-4- methoxyphenyl) acrylate (7.07 g, 31.5 mmol), tetrahydrofuran (50 mL), ethanol (5 mL) and platinum oxide (300 mg) was stirred overnight under a hydrogen atmosphere at room temperature. The catalyst was filtered off and the filtrate was concentrated. The residue was purified by silica gel column chromatography (20% ethyl acetate/hexane) to give the title compound (5.97 g, yield 84%) as a colorless oil. 1H NMR (CDC13) 8 : 1.23 (3H, t, J=7.2Hz), 2.58 (2H, t, J=7.6Hz), 2.90 (2H, t, J=7.6Hz), 3.77 (3H, s), 4.12 (2H, q, J=7. 2Hz), 6.57- 6.63 (2H, m), 7.07-7. 13 (1H, mj.

  • 2
  • [ 691904-77-5 ]
  • [ 691904-78-6 ]
YieldReaction ConditionsOperation in experiment
99.75% Stage #1: 3-(2-fluoro-4-methoxyphenyl)propionic acid ethyl ester With boron tribromide In dichloromethane at 0℃; for 0.5h; Stage #2: With ethanol In dichloromethane at 0℃; 55 Intermediate 55: Ethyl 3-(2-fluoro-4-hydroxyphenyl) propanoateTo a 25 mL RB flask fitted with magnetic stirrer was charged with 10 mL of dichloromethane. To the stirred solvent was added ethyl 3-(2-fluoro-4-methoxyphenyl) propanoate (0.45 g, 2 mmol). The reaction mixture was cooled to 0 °C and boron tribromide (0.45 mL) was added drop wise. After stirred for 30 minutes, the reaction mixture was quenched with ethanol (1 mL) at 0 °C by slow addition. The reaction mixture was concentrated to distill off the solvent; ethyl acetate (10 mL) was added. The organic layer was washed with saturated NaHC03 solution (10 mL), followed by brine solution (10 mL). The organic layer was dried over anhydrous Na2S04 and the solvent was removed under reduced pressure. The product was obtained as colorless oil (0.421 g, yield: 99.75%). 1H NMR (300 MHz, CDCI3): δ 6.93-6.99(1, 1 H), 6.43-6.48(m, 2H), 5.54(s, 1H), 4.02-4.09(q, 2H), 2.79-2.85(t, 2H), 2.50-2.55(t, 2H), 1.14-1.19(t, 3H).
83% Stage #1: 3-(2-fluoro-4-methoxyphenyl)propionic acid ethyl ester With aluminum (III) chloride; Octanethiol In dichloromethane at 10 - 35℃; for 2h; Stage #2: With water In dichloromethane at 0℃; for 0.5h; 25 Reference Example 25 Reference Example 25 ethyl 3-(2-fluoro-4-hydroxyphenyl)-propanoate To a solution of ethyl 3-(2-fluoro-4-methoxyphenyl)-propanoate (57.4 g, 254 mmol) and aluminum chloride (101 g, 761 mmol) in dichloromethane (250 mL) was added dropwise 1-octanethiol (74.3 g, 508 mmol) and the mixture was stirred at room temperature for 2 hr. The reaction mixture was poured into ice water and the mixture was stirred for 30 min. The organic layer was separated, washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=4:1) to give the title compound (44.6 g, yield 83%) as a colorless oil. 1H NMR (CDCl3) δ1.23(3H,t,J=7.2Hz), 2.58(2H,t,J=8.1Hz), 2.89(2H,t,J=8.1Hz), 4.12(2H,q,J=7.2Hz), 6.51-6.56(2H,m), 7.01-7.06(1H,m).
83% With aluminum (III) chloride; Octanethiol In dichloromethane at 20℃; for 2h; 29 To a solution of ethyl 3-(2-fluoro-4-methoxyphenyl)propanoate (57.4 g, 254 mmol) and aluminum chloride (101 g, 761 mmol) in dichloromethane (250 mL) was added dropwise 1-octanethiol (74.3 g, 508 mmol), and the mixture was stirred at room temperature for 2 hr. The reaction mixture was poured into ice water, and the mixture was stirred for 30 min. The organic layer was separated, washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (20% ethyl acetate/hexane) to give the title compound (44.6 g, yield 83%) as a colorless oil. 1H NMR (CDCl3) δ: 1.23(3H, t, J=7.2Hz), 2.58(2H, t, J=8.1Hz), 2.89(2H, t, J=8.1Hz), 4.12(2H, q, J=7.2Hz), 6.51-6.56(2H,m), 7.01-7.06(1H, m).
83% With aluminum (III) chloride; Octanethiol In dichloromethane at 20℃; for 2h; 14 ethyl 3- (2-fluoro-4-hydroxyphenyl) propanoate To a solution of ethyl 3- (2-fluoro-4- methoxyphenyl) propanoate (57.4 g, 254 mmol) and aluminum chloride (101 g, 761 mmol) in dichloromethane (250 mL) was added dropwise 1-octanethiol (74.3 g, 508 mmol) and the mixture was stirred at room temperature for 2 hrs. The reaction mixture was poured into ice water and the mixture was stirred for 30 min. The organic layer was separated, washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (20% ethyl acetate/hexane) to give the title compound (44.6 g, yield 83%) as a colorless oil. 1H NMR (CDC13) 8 : 1.23 (3H, t, J=7.2Hz), 2.58 (2H, t, J=8. 1Hz), 2.89 (2H, t, J=8. lHz), 4.12 (2H, q, J=7. 2Hz), 6.51-6. 56 (2H, m), 7.01-7. 06 (1H, m)
80% With boron tribromide In dichloromethane at -78 - 20℃; for 3h; 7.C [393] Step C: 3-(2-fluoro-4-hydroxy-phenyl)-propionic acid ethyl ester [393] Step C: 3-(2-fluoro-4-hydroxy-phenyl)-propionic acid ethyl ester [394] 3-(2-Fluoro-4-methoxy-phenyl)-propionic acid ethyl ester (2.5 g, 11.05mmol) obtained in Step B was dissolved in anhydrous DCM (10 mL). 1M BBr3solution (33 mL, 33.15 mmol) was added thereto at -78, and the mixture was stirredat room temperature for 3 hours. After the termination of the reaction, MeOHwas added to the reactant. The mixture was concentrated under reduced pressureand purified by column chromatography (eluent, EtOAc/Hex = 1/2) to obtain thetitle compound (1.88 g, 80%).[395] 1H NMR (400 MHz, CDCl3)δ 7.03(1H, t, 8Hz), 6.55-6.51(2H, m), 5.38(1H, brs), 4.13(2H, q, 7Hz),2.89(2H, t, 8Hz), 2.59(2H, t, 8Hz), 1.24(3H, t, 7Hz)

YieldReaction ConditionsOperation in experiment
97% With palladium 10% on activated carbon; hydrogen In ethanol at 20℃; for 12h; 7.B [342] Step D: 3-(3,5-difluoro-4-hydroxy-phenyl)-propionic acid ethyl ester General procedure: [342] Step D: 3-(3,5-difluoro-4-hydroxy-phenyl)-propionic acid ethyl ester [343] (E)-3-(4-Benzyloxy-3,5-difluoro-phenyl)-acrylic acid ethyl ester(1.2 g, 3.77 mmol) obtained in Step C was dissolved in EtOH (20 mL), and 10%Pd/C (120 mg) was added to the solution. The mixture was stirred at roomtemperature under hydrogen atmosphere for 12 hours. The reactant was filteredby using celite and concentrated under reduced pressure to obtain the titlecompound (0.85 g, 98%).[344] 1H NMR (400 MHz, CDCl3)δ 6.77(d, 2H), 4.11(q, 2H), 2.83(t, 2H), 2.59(t, 2H), 1.22(t, 3H)
84% R.135 Reference Example 135 ethyl 3-(2-fluoro-4-methoxyphenyl)propionate The title compound was obtained as a colorless oil in the same manner as in Reference Example 43 from ethyl (2E)-3-(2-fluoro-4-methoxyphenyl)acrylate and platinum oxide. yield 84%. 1H NMR (CDCl3) δ 1.23 (3 H, t, J=7.2 Hz), 2.58 (2 H, t, J=7.6 Hz), 2.90 (2 H, t, J=7.6 Hz), 3.77 (3 H, s), 4.12 (2 H, q, J=7.2 Hz), 6.57-6.63 (2 H, m), 7.07-7.13 (1 H, m).
  • 4
  • [ 691904-77-5 ]
  • [ 1356600-28-6 ]
YieldReaction ConditionsOperation in experiment
Multi-step reaction with 2 steps 1.1: boron tribromide / dichloromethane / 0.5 h / 0 °C 1.2: 0 °C 2.1: triphenylphosphine; di-isopropyl azodicarboxylate / tetrahydrofuran / 0 - 20 °C / Inert atmosphere
  • 5
  • [ 691904-77-5 ]
  • [ 1356598-92-9 ]
YieldReaction ConditionsOperation in experiment
Multi-step reaction with 3 steps 1.1: boron tribromide / dichloromethane / 0.5 h / 0 °C 1.2: 0 °C 2.1: triphenylphosphine; di-isopropyl azodicarboxylate / tetrahydrofuran / 0 - 20 °C / Inert atmosphere 3.1: sodium hydroxide; water / tetrahydrofuran; methanol / 0 °C 3.2: 20 °C / pH 3
  • 6
  • [ 1269763-69-0 ]
  • [ 691904-77-5 ]
YieldReaction ConditionsOperation in experiment
91.58% With hydrogen In ethyl acetate at 20℃; for 2h; 36 Intermediate 54: Ethyl 3-(2-fluoro-4-methoxyphenyl) propanoateTo a 500 mL parr shaker flask was charged with ethyl (2E, 2Z)-3-(2-fluoro-4- methoxyphenyl) prop-2-enoate (0.5 g, 2.2 mmol) and ethyl acetate (15 mL) and purged with nitrogen for 10 minutes. Palladium hydroxide (20%) was added and kept for hydrogenation at 50 psi for 2 h. After completion of the reaction, the reaction mixture was filtered through celite, washed thoroughly with ethyl acetate (25 mL) and concentrated to distill off the solvent. The product was obtained as brown solid (0.462 g, yield: 91.58%). 1H NMR (300 MHz, CDCI3): δ 7.00-7.06(t, 1H), 6.50-6.56(m, 2H), 4.01-4.09(q, 2H), 3.70(s, 3H), 2.81-2.86(t, 2H), 2.49- 2.54(t, 2H), 1.14-1.19(t, 3H).
  • 7
  • [ 867-13-0 ]
  • [ 331-64-6 ]
  • [ 691904-77-5 ]
YieldReaction ConditionsOperation in experiment
Stage #1: diethoxyphosphoryl-acetic acid ethyl ester With sodium hydride In tetrahydrofuran at 0 - 50℃; for 1h; Stage #2: 2-fluoro-4-methoxy-benzaldehyde In tetrahydrofuran at 0℃; for 16h; Reflux; Stage #3: With hydrogen In ethanol for 4h; 6.A An oven dried flask was charged with sodium hydride (60 %) (389 mg, 9.73 mmol) and THF (25 mL) and cooled to 0 °C. Triethyl phosphonoacetate (1.948 mL, 9.73 mmol) was added dropwise and the reaction was heated to 50 °C for lhr. The reaction was then cooled to 0 °C, and 2-fluoro~ 4-methoxy-benzaldehyde (1000 mg, 6.49 mmol) was added via cannula in THF (4 5 mL). The reaction was then heated at reflux for 16 hours. Next, the reaction was cooled to roomtemperature and diluted with ethyl acetate (75 mL). The organic layer was washed with water (2 x 75 mL) and brine (75 mL), dried over sodium sulfate, filtered, and concentrated. The residue was dissolved in ethanol (20 mL) and 10% palladium on carbon (100 mg) was added. The reaction was placed under an atmosphere of (balloon) and stirred for 4 hours. The reaction was then filtered and concentrated. Purification of the residue via flash chromatography on silica gel (0 to 40% ethyl acetate/hexanes) afforded ethyl 3-(2-fluoro-4-methoxyphenyl)propanoate. NMR (CDC13, 500 MHz) δ 7.09 (t, J= 8.5 Hz, 1H), 6.60 (m, 2H), 4.12 (q, J= 7.2 Hz, 2H), 3.77 (s, 3H), 2.90 (t, J= 7.6 Hz, 2H), 2.58 (t, J= 7.7 Hz, 2H)5 1.23 (t, J= 7.2 Hz, 3H).
  • 8
  • [ 691904-77-5 ]
  • [ 1374134-23-2 ]
YieldReaction ConditionsOperation in experiment
With iodine; silver sulfate In ethanol at 20℃; for 1h; 6.B Ethyl 3~(2-fluoro-4~methoxyphenyl)propanoate (1480 mg, 6.54 mmol) was dissolved in ethanol (60 mL). Iodine (1660 mg, 6.54 mmol) and silver sulfate (2040 mg, 6.54 mmol) were added and the reaction was stirred vigorously at room temperature, protected from light, for 1 hr. The reaction was then diluted with ethyl acetate (100 mL) and filtered. The filtrate was washed with sodium bisulfite (2 x 60 mL), water (70 mL), and brine (70 mL). The organic layer was dried over sodium sulfate, filtered, and concentrated. The residue was purified by flashchromatography on silica gel with 0 to 50% ethyl acetate/hexanes to afford ethyl 3-(2-fIuoro-5- iodo-4-methoxyphenyl)propanoate. NMR (CDCI3, 500 MHz) δ 7.59 (d, J= 8.4 Hz, 1H), 6,55 (d, J= 11.6 Hz, 1H), 4.13 (q, J= 7.1 Hz, 2H)S 3.84 (s, 3H), 2.87 (t, J= 7.6 Hz, 2H), 2.57 (t, J= 7.6 Hz, 2H), 1.24 (t, J= 7.1 Hz, 3H).
  • 9
  • [ 691904-77-5 ]
  • [ 1374134-22-1 ]
YieldReaction ConditionsOperation in experiment
Multi-step reaction with 2 steps 1: iodine; silver sulfate / ethanol / 1 h / 20 °C 2: potassium acetate / dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2 / dimethyl sulfoxide / 2 h / 60 °C / Inert atmosphere
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