Method for producing alkyl- 3chlorophenyl -sulfone

摘要

PCT No. PCT/EP90/01846 Sec. 371 Date Jun. 15, 1992 Sec. 102(e) Date Jun. 15, 1992 PCT Filed Nov. 3, 1990 PCT Pub. No. WO91/07384 PCT Pub. Date May 30, 1991.Process for the preparation of alkyl 3-chlorophenyl sulfones of the formula (I), in which R1 and R2 are straight-chain or branched alkyl (C1-C4) groups, which can be identical or different, by reacting alkyl phenyl sulfones of the formula (II), in which R1 and R2 have the meanings given above, with chlorine in sulfuric acid or fuming sulfuric acid at temperatures of about 20 to about 180 DEG C.