Dichloromethane → (S)-6-(methyl(1-phenylethyl)amino)-[1,2,4]triazolo[4,3-b]pyridazine-3-carbonitrile

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Reaction Steps

To a solution of compound (S)-6-(methyl(1-phenylethyl)amino)-[1,2,4]triazolo[4,3-b]pyridazine-3-carboxamide (0.1 g, 0.34 mmol) in 2 mL of DMF, 1 mL of SOCl2 was added dropwise at 0-5° C., the reaction mixture was stirred for 5 h at room temperature. The mixture was poured onto ice (20 mL) and the mixture was neutralized with NaHCO3. DCM (50 mL) was added; the separated organic layer was dried over anhydrous Na2SO4, and concentrated in vacuum. The residue was purified by flash chromatography eluting with PE/EA=5:1 to give product (S)-6-(methyl(1-phenylethyl)amino)-[1,2,4]triazolo[4,3-b]pyridazine-3-carbonitrile as a yellow solid (Compound 9) (60 mg, 64%). LRMS (M+H+) m/z: calcd 279.43; found 279. 1H NMR (300 MHz, CDCl3): δ 7.98-7.94 (d, J=12 Hz, 1H), 7.35-7.30 (m, 5H), 7.11-7.08 (d, J=9 Hz, 1H), 5.77-5.75 (q, 1H), 2.94 (s, 3H), 1.69-1.66 (d, 3H).

Provenance & Evidence