Dichloromethane → Tert-butyl 4-(5'-chloro-6-fluoro-2,4'-bipyridin-2'-yl-amino)piperidine-1-carboxylate

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Reaction Conditions

Reaction Steps

A mixture of tert-butyl 4-(5-chloro-4-iodopyridin-2-yl-amino)piperidine-1-carboxylate (468 mg, 1.069 mmol), 2-fluoro-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (429 mg, 1.925 mmol), PdCl2(dppf).CH2Cl2 adduct (87 mg, 0.107 mmol), DME (7.5 ml), and 2M sodium carbonate (2.406 ml, 4.81 mmol) reaction mixture was stirred at 100° C. for 2 hr. The reaction mixture mixture was cooled to room temperature, mixed with 20 ml of ethyl acetate, filtered and concentrated to yield a crude material. The crude material was purified by silica gel chromatography using a 40 g column, eluting from 0%-40% ethyl acetate with hexane. The desired fractions were combined and concentrated to constant mass, giving 360 mg of the title compound as free base. LCMS (m/z): 407.2 (MH+), retention time=0.85 min.

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