2-Chlorobenzoyl chloride → 2-Chloro-benzoic acid N'-(5-fluoro-pyridin-2-yl)-hydrazide

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To a solution of (5-fluoro-pyridin-2-yl)-hydrazine (for reference procedure see WO 2010/022076, which is incorporated herein by reference; 1.0 g, 7.87 mmol) and 2-chloro-benzoyl chloride (1 mL, 7.87 mmol) in DCM (50 mL) was added dropwise DIPEA (2.74 mL, 15.75 mmol). The reaction mixture was stirred at RT for 1 h then washed with water. The organic layer was dried through a phase separator and then concentrated in vacuo to afford the title compound (1.95 g, 93%) as a brown solid. LCMS (Method 3): Rt 2.82 min, m/z 266 [MH+].

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