A series of sulfinic acids were reacted with alcohols and thiols in the presence of catalytic amounts of scandium(III) or ytterbium(III) triflates. The reaction was performed in dichloromethane at room temperature and was usually complete within a few hours, which could easily be monitored by TLC. As a result, the corresponding sulfinates or S-thiosulfinates were formed in good to high yields (Table [¹] ). All products, except for propyl p-toluenesulfinate (entry 4), are known in ...
