Process for preparing 2-anilinoacridone

Details Process for preparing 2-anilinoacridone Process for preparing 2-anilinoacridone

1982-05-17

1985-10-01

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546 49, 546 56, C07D21906, C07D21908, C09B 4800

Patent

active

045447462

ABSTRACT:
A process is disclosed wherein 2,5-di(phenylamino) terephthalic acid is half-cyclized by dissolving it in a mixture of polyphosphoric acid and phosphoric acid and heating at 100.degree.-120.degree. C. to form 2-(phenyl)amino-3-carboxy-9(10H)acridone (ACA). The ACA is decarboxylated to form 2-(phenyl)amino-9(10H)acridone, also known as 2-anilinoacridone, by dissolving it in tetramethylene sulfone and heating in the presence of a basic cupric carbonate catalyst.

REFERENCES:
patent: 3257405 (1966-06-01), Gerson
patent: 3342823 (1967-09-01), Dien
patent: 3886162 (1975-05-01), Pfister et al.
patent: 4100162 (1978-07-01), North
patent: 4258190 (1981-03-01), Taggi
patent: 4286998 (1981-09-01), Holtje et al.
L. Kalb, Berichte 43, 2209-14, (1910).
Tai, et al., Chemical Abstracts, vol. 80, 81673y, (1974).
Brockmann, et al., Chemische Berichte, 89(6), pp. 1379, 1392, 1396-1397, (1956).
Brockmann, et al., Chemische Berichte, 89(6), pp. 1397-1402, (1956).
Fieser, et al., Reagents for Organic Synthesis, John Wiley & Sons, Inc., N.Y. (1967), pp. 156, 157, 158, 163.

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