Process for the production of pyranthrones or flavanthrones

Details Process for the production of pyranthrones or flavanthrones Process for the production of pyranthrones or flavanthrones

1978-03-13

1980-01-08

Coughlan, Jr., Paul M.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

260360, C09B 342, C09B 520

Patent

active

041828828

ABSTRACT:
A process for the production of pyranthrones or flavanthrones which comprises reacting substituted or unsubstituted 2,2'-dialkyl-1,1'-dianthraquinonyls or 2,2'-diacylamino-1,1'-dianthraquinonyls respectively in a two-phase system of aqueous organic solvents using quaternary ammonium or phosphonium compounds as catalysts.

REFERENCES:
patent: 2855408 (1958-10-01), Dettwyler
patent: 3446810 (1969-05-01), Dien et al.
patent: 3673220 (1972-06-01), Bock
patent: 3723479 (1973-03-01), Schuhmacher

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