反应详情

温度

120 °C

Prepared using General Procedure 10. Into a degassed solution of tert-butyl (S)-2-(5-(tert-butyl)thiophene-2-carboxamido)-3-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)propanoate INT-16 (510 mg, 1.0 mmol) and 5-bromo-2-iodopyrimidine (570 mg, 2.0 mmol) in 2/2/1 MeCN/THF/saturated aqueous NaHCO3 (10 mL) was added Pd(dppf)Cl2 (30 mg, 0.4 mmol). The reaction mixture was heated at 120° C. for 1 h in a microwave reactor. The reaction mixture was diluted with water (100 mL) and EA (50 mL) and filtered over Celite. The aqueous layer was extracted with EA (3×30 mL) and the combined organic layer was dried over MgSO4, concentrated, and purified by chromatography (EA/hexanes) to provide 342 mg (63%) of tert-butyl (S)-3-(4-(5-bromopyrimidin-2-yl)phenyl)-2-(5-(tert-butyl)thiophene-2-carboxamido)propanoate INT-17. LCMS-ESI (m/z) calculated for C26H30BrN3O3S: 543.1. found: 488.0 [M-tBu+H]+, tR=10.95 min (Method 2).

1. customPrepared
2. filtrationfiltered over Celite
3. extractionThe aqueous layer was extracted with EA (3×30 mL)
4. dry with materialthe combined organic layer was dried over MgSO4
5. concentrationconcentrated
6. custompurified by chromatography (EA/hexanes)