反应详情

温度

90 °C

A mixture of 2-acetamido-4-methylthiazole (1.2 g, 7.7 mmol, 1.1 eq), cesium carbonate (4.55 g, 14 mmol, 2 eq), tri-tert-butylphosphinium tetrafluoroborate (0.406 g, 1.4 mmol, 0.2 eq), palladium (II) acetate (0.15 g, 0.7 mmol, 0.1 eq) and 4-bromo-2-tert-butyl-pyridine (Step 1.4) (1.5 g, 7 mmol) in DMF (50 mL) is stirred for 1.5 h at 90° C. under an argon atmosphere, allowed to cool, quenched by addition of a saturated solution of NaHCO3 and filtered through a pad of celite. The filtrate is extracted with EtOAc. The organic phase is washed with a saturated solution of NaHCO3, dried (Na2SO4), filtered and concentrated. The residue is purified by silica gel column chromatography (DCM/MeOH, 1:0→97:3) to afford 2.02 g of the title compound as a yellow solid: ESI-MS: 290.1 [M+H]+; TLC: Rf=0.35 (DCM/MeOH, 9:1).

1. temperatureto cool
2. customquenched by addition of a saturated solution of NaHCO3
3. filtrationfiltered through a pad of celite
4. extractionThe filtrate is extracted with EtOAc
5. washThe organic phase is washed with a saturated solution of NaHCO3
6. dry with materialdried (Na2SO4)
7. filtrationfiltered
8. concentrationconcentrated
9. customThe residue is purified by silica gel column chromatography (DCM/MeOH, 1:0→97:3)