Process for preparing 2-alkyl-5-haloacetylbenzenesulfonamide
申请人:SEITETSU KAGAKU CO., LTD.
公开号:EP0162404B1
公开(公告)日:1988-08-24
US4853158A
申请人:——
公开号:US4853158A
公开(公告)日:1989-08-01
US4943655A
申请人:——
公开号:US4943655A
公开(公告)日:1990-07-24
Salt of 5-acetyl-2-alkylbenzenesulfonic acid
申请人:Seitetsu Kagaku Co., Ltd.
公开号:US04943655A1
公开(公告)日:1990-07-24
Process for preparing 2-alkyl-5-haloacetylbenzenesulfonamide represented by the general formula (1), ##STR1## (wherein R.sup.1 is an alkyl group having 1 to 5 carbon atoms; and X is a chlorine atom, bromine atom or iodine atom), characterized by halogenating a 5-acetyl-2-alkylbenzenesulfonamide represented by the general formula (2), ##STR2## (wherein R.sup.1 is the same as defined above) in a lower alcohol represented by the general formula (3), R.sup.4 --OH (wherein R.sup.4 is an alkyl group having 1 to 5 carbon atoms).