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Ferrous methanesulfonate catalysing the conversion of aromatic,heteroaromatic,unsaturated,and aliphatic aldehydes to 1,1- diacetates at room temperature under solvent-free condition has been developed.The catalytic activity of seventeen metal methanesulfonates was compared under the same condition,ferrous methanesufonate proved to be the best.It can be easily recovered and reused for several times without distinct deterioration in catalytic activity.During the competitive protection between a ketone and an aldehyde group with Ac_2O,1,1-diacetate formed exclusively with the aldehyde group.
Ferrous methanesulfonate catalysing the conversion of aromatic, heteroaromatic, unsaturated, and aliphatic aldehydes to 1,1-diacetates at room temperature under solvent-free condition has been developed. The catalytic activity of seventeen metal methanesulfonates was compared under the same condition, ferrous methanesufonate. to be the best. It can be easily recovered and reused for several times without distinct deterioration in a catalytic activity. Drawing the competitive protection between a ketone and an aldehyde group with Ac_2O, 1,1-diacetate formed exclusively with the aldehyde group.