Lawesson's reagent in tetrahydrofuran T=20°C;

1: With Lawesson's reagent; boron trifluoride diethyl etherate in diethyl ether; toluene T=50°C; 14 h; Inert atmosphere; 2: With sodium hydrogencarbonate in diethyl ether; toluene T=20°C; 0.333333 h; Inert atmosphere;