n-butyllithium in diethyl ether; hexane T=0°C; 1 h;

Multi-step reaction with 2 steps 1: 50 percent / 60-120 mesh silica gel / diethyl ether / 21 °C2: 1.) sulfuryl chloride, pyridine / 1.) ether, 21 deg C, 2 h; 2.) ether, 21 deg C, 2 h