Polyphenylquinoxalines via aromatic nucleophilic displacement

Details Polyphenylquinoxalines via aromatic nucleophilic displacement Polyphenylquinoxalines via aromatic nucleophilic displacement

1989-12-22

1991-04-23

Kight, III, John

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

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

528125, 528126, 528171, 528172, 528185, C08G 802, C07D24136

Patent

active

050101978

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 during 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: 3852244 (1974-12-01), Heath et al.
patent: 3966729 (1976-06-01), Kovar et al.
patent: 4739058 (1988-04-01), Fekhardt et al.

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