反应详情

温度

130 °C

To a 20 mL microwave vial was added 2-isobutyl-5-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-tosyl-1H-indol-5-yl)-1,3,4-oxadiazole (233 mg, 0.530 mmol), dicyclohexyl(2′,4′,6′-triisopropylbiphenyl-2-yl)phosphine (15.2 mg, 0.032 mmol), Pd2(dba)3 (14.6 mg, 0.016 mmol), 2-bromo-4-cyclopropylpyrimidine (CombiPhos Catalysts Inc., 121 mg, 0.610 mmol) and potassium phosphate (338 mg, 1.59 mmol) followed by purging with argon. The solids were treated with dioxane (4.0 mL) and water (0.4 mL) and heated in the microwave at 130° C. for 20 min. The mixture was treated with H2O and extracted with EtOAc, dried over MgSO4, filtered and concentrated. Purification (eluting with 10-60% EtOAc in Hex) afforded 2-(3-(4-cyclopropylpyrimidin-2-yl)-1-tosyl-1H-indol-5-yl)-5-isobutyl-1,3,4-oxadiazole (108 mg, 40%) as a light yellow viscous oil. MS (ESI, pos. ion) m/z: 514.1 (M+1). 1H NMR (400 MHz, CDCl3) δ ppm 9.27 (1H, s), 8.50-8.58 (2H, m), 8.09-8.13 (2H, m), 7.86 (2H, d, J=8.4 Hz), 7.24 (2H, s), 7.07 (1H, d, J=5.1 Hz), 2.84 (2H, d, J=7.2 Hz), 2.35 (3H, s), 2.29 (1H, s), 1.91 (1H, br. s.), 1.34-1.40 (2H, m), 1.17 (2H, dd, J=7.8, 2.9 Hz), 1.07 (6H, d, J=6.7 Hz).

1. customby purging with argon
2. additionThe solids were treated with dioxane (4.0 mL) and water (0.4 mL)
3. additionThe mixture was treated with H2O
4. extractionextracted with EtOAc
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated
8. customPurification (eluting with 10-60% EtOAc in Hex)