1: n-octanethiol With sodium hydroxide in isopropyl alcohol T=60°C; 2 h; 2: ethyl halide With sulfur; 1-(N,N-dimethylaminomethyl)-1,2,4-triazole in isopropyl alcohol T=75 - 80°C; 3 h;

(2,6)3P in methanol Ambient temperature;

4-(N,N-dimethlyamino)pyridine in dichloromethane 18 h; Ambient temperature;