Title:
【発明の名称】4-メチルスルホニル-1-メチル-2-クロルベンゼンの製法
Document Type and Number:
Japanese Patent JP2662508
Kind Code:
B2
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).
Inventors:
FUORUTSU GEORUKU
PAAPENFUUSU TEODOORU
PAAPENFUUSU TEODOORU
Application Number:
JP19376395A
Publication Date:
October 15, 1997
Filing Date:
July 28, 1995
Export Citation:
Assignee:
HEKISUTO AG
International Classes:
C07B61/00; C07C303/22; C07C313/04; C07C315/00; C07C317/14; B01J27/128; (IPC1-7): C07C317/14; B01J27/128; C07C313/04; C07C315/00
Attorney, Agent or Firm:
Mitsufumi Esaki (2 others)