反应详情

Prepare a solution of ethyl benzoate (10 g, 66.5 mmol) in xylene (100 mL). Add Lawesson's reagent (14.5 g, 36 mmol). Reflux the reaction for 5 hours, then concentrate in vacuo to an oil. Chromatograph (silica gel, 100% Hexane) to afford thiobenzoic acid O-ethyl ester (6.9 g). 1H NMR (CDCl3) δ 8.20 (d, J=8 Hz, 2H), 7.52 (t, J=7 Hz, 1H), 7.39 (t, J=7 Hz, 2H), 4.69-4.78 (m, 2H), 1.55 (t, J=7 Hz, 3H).

1. temperatureReflux
2. customthe reaction for 5 hours
3. concentrationconcentrate in vacuo to an oil