反应详情

温度

50 °C

Prepare a suspension of NaCN (0.25 g, 5.2 mmol) in ethanol (50 mL). Add dropwise ethyl isocyanoacetate (5 mL, 45.6 mmol) and thiobenzoic acid O-ethyl ester (6.9 g, 41.5 mmol) in ethanol (25 mL). Stir the reaction mixture at 50° C. for 96 hours and then concentrate in vacuo to an oil. Chromatograph (silica gel, 3:7 hexane/ethyl acetate) to afford 5-phenylthiazole-4-carboxylic acid ethyl ester (6.0 g). MS: m/e=234 (MH+).

1. customPrepare
2. concentrationconcentrate in vacuo to an oil