methyl 2-chloro-4-hydroxybenzoate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Under argon atmosphere, oxalylchloride (0.3 mL) and N,N-dimethylformamide (1 drop) were added to a solution (4.5 mL) of 2-chloro-4-(((2S)-4-methyl-3,4-dihydro-2H-1,4-benzoxazin-2-yl)methoxy)benzoic acid (488 mg: the compound produced by the same procedures as a series of Example 8→Example 9→Example 10 using methyl 4-hydroxy-2-chlorobenzoate instead of the compound produced in Example 3.) in 1,2-dimethoxyethane, which was stirred for 1 hour at 40° C. The title compound was obtained by concentrating the reaction mixture.

反応条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a mixture of methyl 2-chloro-4-hydroxybenzoate (4.43 g) and 2,6-lutidine (6.64 mL) in DCM (50 mL) cooled with an ice bath was added triisopropylsilyl trifluoromethanesulfonate (7.66 mL). After being stirred at 0° C. for 1 h, saturated aqueous NaHCO3 was added thereto. The mixture was diluted with Et2O and layers were separated. The aqueous layer was extracted with Et2O. The combined organic layer was washed with brine, dried over MgSO4 and concentrated. The residue was purified by silica gel column chromatography (EtOAc/hexane). The product was dissolved in diethyl ether (175 mL). To the solution cooled with an ice bath was added lithium aluminum hydride (1.08 g). After being stirred at 0° C. for 30 min, sodium sulfate decahydrate was added thereto. The mixture was filtered through a pad of celite. The filtrate was concentrated. The residue was purified by silica gel column chromatography (EtOAc/hexane) to give the title compound (6.87 g). cooled with an ice bath were separated The aqueous layer was extracted with Et2O The combined organic layer was washed with brine dried over MgSO4 concentrated The residue was purified by silica gel column chromatography (EtOAc/hexane) The product was dissolved in diethyl ether (175 mL) To the solution cooled with an ice bath was added lithium aluminum hydride (1.08 g) After being stirred at 0° C. for 30 min sodium sulfate decahydrate was added The mixture was filtered through a pad of celite The filtrate was concentrated The residue was purified by silica gel column chromatography (EtOAc/hexane)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of methyl 2-chloro-4-hydroxybenzoate (5.0 g, 26.8 mmol) in MeCN (100 mL) was cooled to −30° C. Triflic acid (2.60 mL, 29.48 mmol) was added followed by N-bromosuccinimide (5.25 g, 29.48 mmol) and the reaction was warmed to room temperature and stirred for 1.5 hours. The reaction was quenched by the addition of saturated aqueous Na2CO3 solution (50 mL). The solution was extracted with EtOAc (2×100 mL), the combined organic layers were combined, dried over magnesium sulphate and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with 20-40% EtOAc in heptanes to afford the title compound as a white solid (2.60 g, 37%). The reaction was quenched by the addition of saturated aqueous Na2CO3 solution (50 mL) The solution was extracted with EtOAc (2×100 mL) dried over magnesium sulphate concentrated in vacuo The residue was purified by silica gel column chromatography eluting with 20-40% EtOAc in heptanes

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 2-Chloro-4-hydroxy-benzoic acid methyl ester from example E41b (2.0 g, 10.9 mmol) and 4-(2-Bromo-acetyl)-piperazine-1-carboxylic acid tert-butyl ester from Example E41a (3.68 g, 12.0 mmol) in acetonitrile (30 ml) were treated with potassium carbonate (1.6 g, 11.5 mmol), and the mixture heated at reflux 18 h. before the solvents were removed in vacuo. The residue was adsorbed onto silica gel and purified by flash chromatography on silica gel (eluant; 20% EtOAc:80% cyclohexane to 50% EtOAc:50% cyclohexane to 70% EtOAc:30% cyclohexane) to yield the title compound (4.5 g, 100%). the mixture heated at reflux 18 h. before the solvents were removed in vacuo purified by flash chromatography on silica gel (eluant; 20% EtOAc:80% cyclohexane to 50% EtOAc:50% cyclohexane to 70% EtOAc:30% cyclohexane)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 2-chloro-4-hydroxy-benzoic acid (3.70 g, 21.4 mmol)) in methanol (50 ml) was treated with thionyl chloride (2.4 ml, 32 mmol) dropwise and stirred for 24 hours and the solvents were removed in vacuo. The residue was dissolved in ethyl acetate and washed with sat. sodium hydrogen carbonate, dried and solvents were removed in vacuo. The residue was purified by column chromatography on silica gel (eluant with 30% EtOAc:70% cyclohexane) to yield the desired product as a yellow solid, 3.68 g, 92%. the solvents were removed in vacuo The residue was dissolved in ethyl acetate washed with sat. sodium hydrogen carbonate dried solvents were removed in vacuo The residue was purified by column chromatography on silica gel (eluant with 30% EtOAc:70% cyclohexane)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 2-Chloro-4-hydroxy-benzoic acid methyl ester from example E41b (2.0 g, 10.9 mmol) and 4-(2-Bromo-acetyl)-piperazine-1-carboxylic acid tert-butyl ester from Example E41a (3.68 g, 12.0 mmol) in acetonitrile (30 ml) were treated with potassium carbonate (1.6 g, 11.5 mmol), and the mixture heated at reflux 18 h. before the solvents were removed in vacuo. The residue was adsorbed onto silica gel and purified by flash chromatography on silica gel (eluant; 20% EtOAc:80% cyclohexane to 50% EtOAc:50% cyclohexane to 70% EtOAc:30% cyclohexane) to yield the title compound (4.5 g, 100%). the mixture heated at reflux 18 h. before the solvents were removed in vacuo purified by flash chromatography on silica gel (eluant; 20% EtOAc:80% cyclohexane to 50% EtOAc:50% cyclohexane to 70% EtOAc:30% cyclohexane)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 2-chloro-4-hydroxy-benzoic acid (3.70 g, 21.4 mmol)) in methanol (50 ml) was treated with thionyl chloride (2.4 ml, 32 mmol) dropwise and stirred for 24 hours and the solvents were removed in vacuo. The residue was dissolved in ethyl acetate and washed with sat. sodium hydrogen carbonate, dried and solvents were removed in vacuo. The residue was purified by column chromatography on silica gel (eluant with 30% EtOAc:70% cyclohexane) to yield the desired product as a yellow solid, 3.68 g, 92%. the solvents were removed in vacuo The residue was dissolved in ethyl acetate washed with sat. sodium hydrogen carbonate dried solvents were removed in vacuo The residue was purified by column chromatography on silica gel (eluant with 30% EtOAc:70% cyclohexane)

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Methyl 2-chloro-4-hydroxybenzoate (Acros Organics; 0.2 g, 1.072 mmol) was stirred with 2-bromopropane (0.201 ml, 2.144 mmol) and potassium carbonate (296 mg, 2.144 mmol) in DMF (2 ml) at 100° C. for 1.5 hr. The mixture was allowed to cool to room temperature and filtered. The filtrate was concentrated under vacuum and the residue was purified by Mass-Directed Auto-Preparative HPLC (formic acid modifier) to give the title compound as a yellow oil (150 mg). filtered The filtrate was concentrated under vacuum the residue was purified by Mass-Directed Auto-Preparative HPLC (formic acid modifier)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To an ice-cold solution of [4-butyl-2-(4-trifluoromethyl-phenyl)-thiazole-5-yl]-methanol (1.0 g, 3.17 mmol), 2-chloro-4-hydroxy-benzoic acid methyl ester (592 mg, 3.17 mmol) and triphenylphosphine (832 mg, 3.17 mmol) in dichloromethane add diethyl azodicarboxylate (0.567 mL, 3.17 mmol). Stir the reaction mixture for 2 hours while allowing it to warm to room temperature. Remove the solvent under reduced pressure and purify the residue by flash chromatography on silica gel to give 4-[4-butyl-2-(4-trifluoromethyl-phenyl)-thiazol-5-ylmethoxy]-2-chloro-benzoic acid methyl ester (600 mg). Remove the solvent under reduced pressure purify the residue by flash chromatography on silica gel