反应详情

温度

100 °C

A brown mixture of methyl 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-tosyl-1H-indole-5-carboxylate (1.85 g, 4.06 mmol), 2-chloro-4-isopropylpyrimidine (0.700 g, 4.47 mmol) [CombiPhos Catalyst Inc.], potassium phosphate (2.59 g, 12.19 mmol), Pd2(dba)3 (0.15 g, 0.16 mmol), and dicyclohexyl(2′,4′,6′-triisopropylbiphenyl-2-yl)phosphine (X-Phos) (0.15 g, 0.32 mmol) in dioxane (15 mL) and H2O (3.00 mL) was purged with argon then heated in an oil bath at 100° C. for 3 h. The reaction was cooled to RT, diluted with EtOAc (100 mL), washed with NaOH (5 mL of 0.5 N) followed by brine (5 mL). The organic solution was dried and concentrated. Chromatographic purification of the brown residue (20-80% EtOAc/Hex) furnished methyl 3-(4-isopropylpyrimidin-2-yl)-1-tosyl-1H-indole-5-carboxylate (1.37 g, 75%) as a light-yellow solid. This material was used in next step without further purification. MS (ESI, pos. ion) m/z: 450.0 (M+1).

1. customwas purged with argon
2. temperatureThe reaction was cooled to RT
3. additiondiluted with EtOAc (100 mL)
4. washwashed with NaOH (5 mL of 0.5 N)
5. customThe organic solution was dried
6. concentrationconcentrated
7. customChromatographic purification of the brown residue (20-80% EtOAc/Hex)