公开(公告)号：DE3404337A1

公开(公告)日：1985-08-08

申请号：DE3404337

申请日：1984-02-08

Applicant: BASF AG

Inventor： BROECKER FRANZ JOSEF DR ,  TAVS PETER DR ,  LAAS HARALD DR ,  ADERS WOLF-KARLO DR

IPC: C07C37/07 ,  C07C39/08

Abstract: 2,3,6-Trimethylhydroquinone is prepared by catalytic hydrogenation of 2,3,6-trimethylquinone with hydrogen in the presence of a solvent by a continuous process in which the reaction is carried out over a platinum/alumina catalyst.

公开(公告)号：DE2961068D1

公开(公告)日：1981-12-24

申请号：DE2961068

申请日：1979-08-04

Applicant: BASF AG

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