In order to increase the applications of the water-soluble active ester method, water-soluble acylating reagents,[p-(benzyloxycarbonyloxy) phenyl] dimethylsulfonium methyl sulfate,[p-(t- butoxycarbonyloxy) phenyl] dimethylsulfonium methyl sulfate and [p-(9- fluorenylmethyloxycarbonyloxy) phenyl] dimethylsulfonium methyl sulfate, were synthesized from of p-hydroxyphenyldimethylsulfonium methyl sulfate. These compounds had high ...