Para acyloxy:benzene sulphonate prepn.

摘要

Prepn. of para-acyloxybenzene sulphonates of formula (I) is claimed (where R1 = opt. branched 6-11C aliphatic gp.; R2 = H, halogen, 1-4C alkyl or SO3M; M = alkali(ne earth)metal or NH4). An alkali(ne earth) metal or NH4 phenol sulphonate (II) is acylated with a 7-12C opt. branched acid anhydride (III) in an aprotic polar solvent in the presence of a sulphonic acid as catalyst. Pref. (II) is Na or K phenol sulphonate and (III) contains 9C.