Process for producing dioxazine compounds, colored materials the

Details Process for producing dioxazine compounds, colored materials the Process for producing dioxazine compounds, colored materials the

1995-05-25

1998-03-31

Shah, Mukund J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Chalcogen in the nitrogen containing substituent

C07D49822

Patent

active

057340501

ABSTRACT:
The present invention relates to a process for producing a dioxazine compound represented by the formula (1) which comprises carrying out a ring closure reaction of a compound represented by the formula (2) in the presence of a dioxazine derivative of the formula (3): ##STR1##

REFERENCES:
patent: 4253839 (1981-03-01), Spietschka et al.
patent: 4526963 (1985-07-01), Deur
patent: 5275653 (1994-01-01), Dietz et al.
patent: 5318627 (1994-06-01), Dietz et al.
Journal of Heterocyclic Chemistry., vol. 27, 1990, pp. 1575-1579.
Kozawa et al. "Carbazoledioxanes . . . " Jul. 1990.
Copy of the European Search Report in English dated Aug 25, 1995.
PB Report 65657 "German Dyestuffs and Dyestuffs Intermediates" (1946), Sep.

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