Polyphenylquinoxalines via aromatic nucleophilic displacement

Details Polyphenylquinoxalines via aromatic nucleophilic displacement Polyphenylquinoxalines via aromatic nucleophilic displacement

1988-09-28

1990-03-13

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528126, 528171, 528172, 528185, C08G 7306

Patent

active

049084267

ABSTRACT:
Polyphenylquinoxalines are prepared by the nucleophilic displacement reaction of di(hydroxyphenyl)quinoxaline monomers with activated aromatic dihalides or dinitro compounds. The reactions are carried out in polar aprotic solvents using alkali metal bases at elevated temperatures under nitrogen. The di(hydroxyphenyl)quinoxaline monomers are prepared either by reacting stoichiometric quantities of aromatic bis(o-diamines) with a hydroxybenzil or by reacting o-phenylenediamine with a dihydroxybenzil or bis(hydroxyphenylglyoxylyl)benzene.

REFERENCES:
patent: 4024067 (1977-05-01), Paciorek et al.
patent: 4375536 (1983-03-01), Hergenrother
Chemical Abstracts vol. 109, 1988-55338r.

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