Process for the preparation of triphendioxazines

Details Process for the preparation of triphendioxazines Process for the preparation of triphendioxazines

1988-06-28

1989-12-12

Raymond, Richard L.

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

Organic compounds

Chalcogen in the nitrogen containing substituent

544 75, 544 77, C07D49804

Patent

active

048868809

ABSTRACT:
A process for the preparation of triphendioxazines of oxidising cyclisation of 2,5-diarylamino-1,4-benzoquinones with oleum and further optional oxidising agents and/or catalysts, which process comprises charging a reactor simultaneously with the 2,5 diarylamino-1,4-benzoquinone and oleum.

REFERENCES:
patent: 3883523 (1975-05-01), Parton
patent: 3892742 (1975-07-01), Parton
patent: 3996221 (1976-12-01), Leng et al.
patent: 4532323 (1985-07-01), Jager
patent: 4577015 (1986-03-01), Jager et al.
patent: 4604459 (1986-08-01), Jager
C.A. 106:6429a, (1987).
C.A. 100:211658s, (1984).

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