indium(III) chloride; sodium tetrahydroborate in acetonitrile T=-10°C; 2.75 h;

sodium sulfide; tri-n-butylhexadecylphosphonium bromide in toluene T=25°C; 0.166667 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

sodium sulfide; tri-n-butylhexadecylphosphonium bromide in toluene T=25°C; 0.166667 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;