公开(公告)号：ZA9201040B

公开(公告)日：1992-10-28

申请号：ZA9201040

申请日：1992-02-13

Applicant: HOECHST AG

Inventor： FOLZ GEORG ,  GEORG FOLZ ,  PAPENFUHS THEODOR ,  THEODOR PAPENFUHS

IPC: B01J27/128 ,  C07B61/00 ,  C07C303/22 ,  C07C313/04 ,  C07C315/00 ,  C07C317/14 ,  C07C

CPC classification number: C07C313/04 ,  C07C303/22 ,  C07C315/00 ,  C07C317/14 ,  C07C309/86

公开(公告)号：ZA921040B

公开(公告)日：1992-10-28

申请号：ZA921040

申请日：1992-02-13

Applicant: HOECHST AG

Inventor： FOLZ GEORG ,  GEORG FOLZ ,  PAPENFUHS THEODOR ,  THEODOR PAPENFUHS

IPC: C07B61/00 ,  B01J27/128 ,  C07C303/22 ,  C07C313/04 ,  C07C315/00 ,  C07C317/14 ,  C07C

Abstract: Process for the preparation of 4-alkylsulfonyl-1-alkyl-2-chlorobenzenes and like compounds.A process for the preparation of 4-alkyl(C1-C4)-sulfonyl-1-alkyl-2-chlorobenzenes, in very good yields and with high selectivity by selectively chlorinating a p-alkyl-benzenesulfonyl chloride with gaseous chlorine in the presence of a chlorine carrier at 50° C. to 100° C. to give a compound of the formulain which R1 is an alkyl (C1-C4) group, subsequently reducing the latter in an aqueous medium at a pH of 8 to 10 with sodium hydrogen sulfite or sodium sulfite at 40 to 90° C. to give a compound of the formulaand reacting the latter with alkyl(C1-C4) chloride in the presence of an acid binder at 80 to 150° C., and also compounds of the last mentioned formula which, instead of the -SO2Na group contain the -SO2X group (X=hydrogen atom or alkali metal atom).