Having -c(=x)-, Wherein X Is Chalcogen, Attached Indirectly To The Sulfonate Group By Nonionic Bonding (e.g., Aldehydes, Etc.) Patents (Class 562/46)
Chalcogen or nitrogen bonded directly to the -c(=x)- group (Class 562/47)
  • Salt of 5-acetyl-2-alkylbenzenesulfonic acid
    Patent number: 4943655
    Abstract: 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).
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: July 24, 1990
    Assignee: Seitetsu Kagaku Co., Ltd.
    Inventors: Kunioki Kato, Masao Kawamura, Hiroshi Goda, Kiyoshi Sawada, Kazuhiro Hamatani
  • Process for preparing N,N-dialkylaniline salt of 5-acetyl-2-alkylbenzene sulfonic acid
    Patent number: 4853158
    Abstract: 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).
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: August 1, 1989
    Assignee: Seitetsu Kagaku Co., Ltd.
    Inventors: Kunioki Kato, Masao Kawamura, Hiroshi Goda, Kiyoshi Sawada, Kazuhiro Hamatani