-
公开(公告)号:DE2734207A1
公开(公告)日:1979-02-08
申请号:DE2734207
申请日:1977-07-29
Applicant: BASF AG
Abstract: Prodn. of alpha-ketocarboxylic acid derivs. of formula R1COR2 (R1 is opt. 1-30C aryl or (cyclo)alkyl, R2 is carboxylic acid deriv. gp.) (I) comprises oxidn. of corresp. hydroxy cpds (II) with Cl2 or Br2 at 180 degrees C. The solvent is pref. a halogenated hydrocarbon, specif. chlorobenzene and reaction is opt. in presence of light and/or a radical former. Acid derivs. used are esters, nitriles amides or halides, esp. 1-10C alkyl esters. (I) are intermediates for plant-protection agents and also useful as photoinitiators. The method is esp. used for arylglyoxylic acid esters. Good yields are achieved (no significant replacement of OH by halogen) without the need for expensive or polluting oxidising agents.
-
公开(公告)号:DE2651226A1
公开(公告)日:1978-05-18
申请号:DE2651226
申请日:1976-11-10
Applicant: BASF AG
-
公开(公告)号:DE2651194A1
公开(公告)日:1978-05-18
申请号:DE2651194
申请日:1976-11-10
Applicant: BASF AG
-
公开(公告)号:DE2932712A1
公开(公告)日:1981-03-26
申请号:DE2932712
申请日:1979-08-13
Applicant: BASF AG
Inventor: HUPFER LEOPOLD DIPL CHEM DR , GRAF FRITZ DIPL CHEM DR , EBERHARD PETER DIPL CHEM DR , WICKENHAEUSER GERHARD DIPL ING , SCHLUETER LOTHAR DIPL ING DR
IPC: C07D233/58 , C07D233/54
-
公开(公告)号:DE2917381A1
公开(公告)日:1980-11-13
申请号:DE2917381
申请日:1979-04-28
Applicant: BASF AG
Inventor: EBERHARD PETER DIPL CHEM DR , HUPFER LEOPOLD DIPL CHEM DR , GRAF FRITZ DIPL CHEM DR , SCHULTE WOLFGANG DIPL CHEM DR
IPC: C07D233/54 , C07D233/58
-
-
-
-