反应详情

To a stirred solution of (1H-Pyrazol-3-yl)-acetonitrile (1.56 g, 14.5 mM) from Preparative Example 3 Step C in absolute EtOH (73 mL) at 25° C. was added o-chlorobenzylidene malononitrile (2.74 g, 14.5 mM) and piperidine (0.14 mL, 1.45 mM). The mixture then refluxed for 1.75 hr. The solvent evaporated. Chromatography on silica gel (30×5 cm) with CH2Cl2 afforded 7-Amino-5-(2-chloro-phenyl)-pyrazolo[1,5-a]pyridine-4,6-dicarbonitrile (0.62 g, 15%). HRMS: m/z 293.0472 (M+), Calcd. C15H8N5Cl1: m/z 293.0468; δC (CDCl3) CH: 99.3, 127.6, 129.6, 130.8, 131.6, 145.5; C: 75.7, 86.9, 114.8, 115.1, 131.5, 133.8, 138.4, 145.6, 149.2.

1. temperatureThe mixture then refluxed for 1.75 hr
2. customThe solvent evaporated