反应详情

A suspension of Example A2 (0.62 g, 2.2 mmol), KI (3.7 g, 22.3 mmol), and diiodomethane (5 mL, 62 mmol) was treated with t-butylnitrite (1.4 mL, 11.7 mmol) and stirred at RT for 12 h. The mixture was treated with EtOAc, washed successively with satd. NaHCO3 (3×), 10% Na2S2O3 (2×), and brine (2×) and the combined aqueous washes were back-extracted with EtOAc (2×). The combined organics were dried over MgSO4, concentrated to dryness and purified by silica gel chromatography (EtOAc/DCM) to afford 2-iodo-4-methyl-5-((2-(1-methyl-1H-pyrazol-4-yl)pyridin-4-yl)oxy)pyridine (0.51 g, 59%). MS (ESI) m/z: 393.0 (M+H+).

1. washwashed successively with satd
2. extractionNaHCO3 (3×), 10% Na2S2O3 (2×), and brine (2×) and the combined aqueous washes were back-extracted with EtOAc (2×)
3. dry with materialThe combined organics were dried over MgSO4
4. concentrationconcentrated to dryness
5. custompurified by silica gel chromatography (EtOAc/DCM)