反应详情

Following the procedure for Example 282A Step 1, 4-hydrazinylpyridin-2(1H)-one was heated at 80° C. overnight with 4,4-dimethyl-3-oxopentanenitrile. The reaction mixture was concentrated, triturated with DCM, and purified using silica gel chromatography eluting with a MeOH/DCM gradient (2-10%) to afford 4-(5-amino-3-tert-butyl-1H-pyrazol-1-yl)pyridin-2(1H)-one (307 mg, 33% yield). 1H NMR (300 MHz, DMSO d6) δ 1.18 (s, 9H), 5.43 (s, 1H), 5.47 (s, 2H), 6.55 (s, 1H), 6.66 (m, 1H), 7.37 (d, 1H), 11.40 (s, 1H); LC-MS (ESI) m/z 233 (M+H)+

1. concentrationThe reaction mixture was concentrated
2. customtriturated with DCM
3. custompurified
4. washeluting with a MeOH/DCM gradient (2-10%)