Dichloromethane → Methyl 3-(3-bromo-2-(4-fluorophenyl)furo[2,3-b]pyridin-5-yl)benzoate

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Reaction Steps

(Diazomethyl)trimethylsilane (467 μL, 0.934 mmol) was added to a stirring solution of 3-(3-bromo-2-(4-fluorophenyl)furo[2,3-b]pyridin-5-yl)benzoic acid (350 mg, 0.849 mmol) in MeOH (5.7 mL) and Ether (2.8 mL) at room temperature. It was allowed to stir overnight. The mixture was concentrated and resubjected to the reaction conditions using DCM as the solvent. This was repeated again using THF as the solvent. The reaction was concentrated to give the expected product methyl 3-(3-bromo-2-(4-fluorophenyl)furo[2,3-b]pyridin-5-yl)benzoate (350 mg, 0.821 mmol, 97% yield) consistent by LCMS. LC-MS retention time: 2.01 min; m/z (MH+): 426, 428. LC data was recorded on a Shimadzu LC-10AS liquid chromatograph equipped with a Waters XBridge 5u C18 4.6×50 mm column using a SPD-10AV UV-Vis detector at a detector wave length of 220 nM. The elution conditions employed a flow rate of 5 ml/min, a gradient of 100% solvent A/0% solvent B to 0% solvent A/100% solvent B, a gradient time of 2 min, a hold time of 1 min, and an analysis time of 3 min where solvent A was 5% acetonitrile/95% H2O/10 mM ammonium acetate and solvent B was 5% H2O/95% acetonitrile/10 mM ammonium acetate. MS data was determined using a Micromass Platform for LC in electrospray mode.

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