Process for the preparation of oxy-diphthalic anhydrides

Details Process for the preparation of oxy-diphthalic anhydrides Process for the preparation of oxy-diphthalic anhydrides

1986-10-03

1987-09-29

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30789

Patent

active

046970231

ABSTRACT:
Oxy-diphthalic anhydrides are prepared by reacting a halophthalic anhydride with water and an alkali metal compound such as KF, CsF or K.sub.2 CO.sub.3 in the presence of a polar, aprotic solvent.

REFERENCES:
Mitsui Toatsu Chemicals, Chemical Abstracts, vol. 94 (1981) 83799g.
Mitsui Toatsu Chemicals, Chemical Abstracts, vol. 94 (1981) 191,942g.

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