sulfuryl dichloride in dichloromethane T=-36 - -30°C; 0.5 h;

in water T=70 - 80°C; 1 h;

pyridine; diisobutylaluminium hydride; trichlorophosphate 1a) toluene, 2 h, rt, b) 80 deg C, 30 min, 2a) Et2O, hexane, 30 min, -30 deg C, b) 3 h, rt; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;