JPS6221780B

JPS6221780B

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...

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Bibliographische Detailangaben
Hauptverfasser: HANSU YOAHIMU OPUGENOORUTO, UORUFUGANGU SHURUTE, HORUSUTO SHOIERUMAN, HAARARUTO RAASU, AKUSERU NITSUSEN, HANSU RIHIARUTO MYURAA
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung: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.