1165799-99-4|2-(4-(Methoxycarbonyl)phenyl)quinoline-4-carboxylic acid|Ambeed

Yield	Reaction Conditions	Operation in experiment
53%	With potassium carbonate;tetrakis(triphenylphosphine) palladium(0); In 1,4-dioxane; at 150℃;Microwave irradiation;	2-Chloro-quinoline-4-carboxylic acid (0.23 g, 1.4 mmol) was dissolved in dioxane (5 mL) and (4-methoxycarbonylphenyl)boronic acid (0.39 g, 2.2 mmol), Pd(PPh3)4 (0.20 g, 0.17 mmol) and K2CO3 (0.73 g, 5.3 mmol) were added. The reaction mixture was degassed, sealed, and heated in the microwave at 150 0C for 30 min. The reaction mixture was filtered and concentrated in vacuo to leave a residue. The residue was purified by flash column chromatography, using a 1:2 mixture of EtO Ac/heptane with 1percent acetic acid as eluent, to give the title compound (0.23 g, 53percent). m/z 308.06 (M+H)+.
53%	With tetrakis(triphenylphosphine) palladium(0); potassium carbonate; In 1,4-dioxane; water; at 150℃; for 0.5h;Inert atmosphere; Microwave irradiation;	2-Chloro-6-methylisonicotinic acid in place of 2-bromoisonicotinic acid. 2-Chloro-quinoline-4-carboxylic acid (0.23 g, 1.4 mmol) was dissolved in dioxane (5 mL) and (4-methoxycarbonylphenyl)boronic acid (0.39 g, 2.2 mmol), Pd(PPh3)4 (0.20 g, 0.17 mmol) and K2CO3 (0.73 g, 5.3 mmol) were added. The reaction mixture was degassed, sealed, and heated in the microwave at 150 °C for 30 min. The reaction mixture was filtered and concentrated in vacuo to leave a residue. The residue was purified by flash chromatography, using a 1:2 mixture of EtOAc/heptane with 1percent AcOH as eluent, to give the intermediate 2-[4-(methoxycarbonyl)phenyl]quinoline-4-carboxylic acid (0.23 g, 53percent). m/z 308.06 (M+H)+. TBTU (86 mg, 0.27 mmol) and N-methylmorpholine (39 mg, 0.38 mmol) were added to a solution of 2-[4-(methoxycarbonyl)phenyl]quinoline-4-carboxylic acid (29 mg, 0.10 mmol) in DMF (2 mL) and the reaction mixture was stirred at rt for 10 min. tert-Butyl [trans-4-(amino-methyl)cyclohexyl]methyl}carbamate (35 mg, 0.15 mmol) was then added and the reaction mixture was stirred at rt for 2 h. The reaction mixture was concentrated in vacuo to leave a residue, which was dissolved in DCM and washed with a saturated aq. solution of NaHCO3 and dried (phase separator). The mixture was concentrated in vacuo to leave a residue which was dissolved in DMSO and purified by HPLC using a gradient of 30-100percent mobile phase A (100percent CH3CN) over 30 min (mobile phase B = 5percent CH3CN + 95percent 0.1M NH4OAc) to give the intermediate methyl ester (12 mg, 24percent). m/z 530.32 (M+H)+.

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2-(4-(Methoxycarbonyl)phenyl)quinoline-4-carboxylic acid

CAS No.: 1165799-99-4

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[ 1165799-99-4 ] Synthesis Path-Downstream 1~1

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