1: With sodium hydroxide; N-benzyl-N,N,N-triethylammonium chloride T=70 - 75°C; 4 h; 2: With sodium hydroxide; N-benzyl-N,N,N-triethylammonium chloride; hydroquinone T=80°C; 1.5 h; Title compound not separated from byproducts;

copper(l) chloride T=170°C; P=608 - 760 Torr; 6 h; other temperatures; time; amount of the catal.; Product distribution;

butane-1-thiol; boron trifluoride diethyl etherate; sulfur dioxide; p-benozquinone T=90°C; 8 h;

boron trifluoride diethyl etherate; sulfur dioxide; p-benozquinone T=90°C; 8 h; Yield given;