反应详情

A THF solution of (2-(1,3-dioxolan-2-yl)ethyl)zinc(II) bromide (35 mL, 17.3 mmol) was added to a degassed solution of ethyl 5-bromo-2-phenylthiazole-4-carboxylate (3.6 g, 11.5 mmol) and tetrakistriphenylphosphine palladium (666 mg, 0.58 mmol) in THF (20 mL). The reaction mixture was heated at reflux for 16 h then poured into sat aq NaHCO3. The mixture was extracted with EtOAc, washed with brine, dried (MgSO4), and concentrated. The crude product was purified by MPLC eluting with pentane/EtOAc (0-100% gradient) to give ethyl 5-(2-(1,3-dioxolan-2-yl)ethyl)-2-phenylthiazole-4-carboxylate (2.0 g, 52% yield).

1. temperatureThe reaction mixture was heated
2. temperatureat reflux for 16 h
3. additionthen poured
4. extractionThe mixture was extracted with EtOAc
5. washwashed with brine
6. dry with materialdried (MgSO4)
7. concentrationconcentrated
8. customThe crude product was purified by MPLC
9. washeluting with pentane/EtOAc (0-100% gradient)