公开(公告)号：DE2834607A1

公开(公告)日：1980-02-28

申请号：DE2834607

申请日：1978-08-07

Applicant: BASF AG

Inventor： LAAS HARALD DIPL CHEM DR ,  NISSEN AXEL DIPL CHEM DR ,  OPGENORTH HANS-JOACHIM DIPL CH ,  SCHEUERMANN HORST DIPL CHEM DR ,  MUELLER HANS-RICHARD DIPL CHEM ,  SCHULTE WOLFGANG DIPL CHEM DR

IPC: C07D209/08 ,  C07D209/60 ,  C07D209/96 ,  C07D263/38 ,  C07D263/52

Abstract: A process for the preparation of an indolenine of the general formula I I where R, R1 and R2 are aliphatic radicals and R1 and R2 may also be linked and the ring A may be additionally substituted, wherein a compound of the formula II II is heated in the presence of a Lewis acid and of a halide. The products are valuable starting compounds for the preparation of dyes.

公开(公告)号：DE2631163A1

公开(公告)日：1978-01-19

申请号：DE2631163

申请日：1976-07-10

Applicant: BASF AG

Inventor： OPGENORTH HANS-JOACHIM DIPL CH ,  SCHEUERMANN HORST DIPL CHEM DR

IPC: C07D277/82 ,  C09B29/00

Abstract: Process for the production of benzothiazoles from N-arylsubstituted thioureas by oxidative ring closure characterized by the use of chlorine as oxidizing agent and by the presence of catalytic amounts of bromine. Yield and quality of the benzothiazoles obtained are very good.

公开(公告)号：DE2805620A1

公开(公告)日：1979-08-23

申请号：DE2805620

申请日：1978-02-10

Applicant: BASF AG

Inventor： OPGENORTH HANS-JOACHIM DIPL CH ,  SCHEUERMANN HORST DIPL CHEM DR ,  LAAS HARALD DIPL CHEM DR ,  NISSEN AXEL DIPL CHEM DR

IPC: C07D209/08

公开(公告)号：DE2719079A1

公开(公告)日：1978-11-09

申请号：DE2719079

申请日：1977-04-29

Applicant: BASF AG

Inventor： OPGENORTH HANS-JOACHIM DIPL CH ,  SCHEUERMANN HORST DIPL CHEM DR

IPC: C07D213/84 ,  C07D213/85 ,  C07D213/60

Abstract: Prodn. of pyridone derivs. of formula (I) (in any possible tautomeric form) comprises reacting (a) HC=C.COOR1 (II) and XCH2.CONHR (III) or (b) HC=C.CONHR (IV) and XCH2 COOR1 (V) in presence of a base, then treating with acid and R1 is opt. substd. alkyl, alkenyl, aycloalkyl, aralkyl or phenyl. Pref. cpds. have X=CN or carbonyol, opt. mono- or di-alkyl substd., and R = H or 1-4C alkyl. In the formula, X is CN, NO2, acyl, carboxylic, ester, phosphoric ester, opt. substd. carbomoyl or sulphamoyl, tert, ammonium, tert. phosphonium, di-substd. sulphonium or sulphoxonium, or a sulphone or sulphonic acid ester gp. R - H opt. substd. alkyl, alkenyl, cycloalkyl, aralkyl or aryl). (I) are couplers and condensation components in prodn. of dyes. Good yields of high purity prod. are obtd.