Process for the preparation of naphthostyril

Details Process for the preparation of naphthostyril Process for the preparation of naphthostyril

1977-08-05

1979-05-01

Berch, Mark L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D20992

Patent

active

041523300

ABSTRACT:
Naphthostyril is obtained in high space/time yields by reacting 1-naphthyl isocyanate with an anhydrous aluminium halide in an inert solvent, carrying out the reaction in a homogeneous solution using 700-1.800 ml of solvent per mol of 1-naphthyl isocyanate in the temperature range from 140.degree.-160.degree. C. and -- after hydrolysis of the reaction mixture -- separating the phases. Naphthostyril is an intermediate for preparation of dyestuffs.

REFERENCES:
patent: 2628964 (1953-02-01), Scalera
Dokunikhin, C.A. 55, 21139i (1959).

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