Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1979-08-09
1980-12-23
Daus, Donald G.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
548216, 548229, C07D20908, C07D26322
Patent
active
042409632
ABSTRACT:
A process for the preparation of an indolenine of the general formula I ##STR1## where R, R.sup.1 and R.sup.2 are aliphatic radicals and R.sup.1 and R.sup.2 may also be linked and the ring A may be additionally substituted, wherein a compound of the formula II ##STR2## is heated in the presence of a Lewis acid and of a halide. The products are valuable starting compounds for the preparation of dyes.
Laas Harald
Mueller Hans-Richard
Nissen Axel
Opgenorth Hans-Joachim
Scheuermann Horst
BASF - Aktiengesellschaft
Daus Donald G.
Eakin M. C.
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