Preparation of hexaarylbisimidazoles

Details Preparation of hexaarylbisimidazoles Preparation of hexaarylbisimidazoles

1987-06-09

1989-09-12

Schwartz, Richard A.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548346, C07D23388

Patent

active

048661830

ABSTRACT:
Hexaarylbisimidazoles I ##STR1## where Ar.sup.1, Ar.sup.2 and Ar.sup.3 are each aryl, of which Ar.sup.2 and Ar.sup.3 can be linked to form an anellated ring system, are prepared by oxidizing the corresponding triarylimidazoles II in an aqueous/organic two-phase system in the presence of active amounts of an onium salt III.

REFERENCES:
Maeda, K., et al., Bull. Chem. Soc. Jap. 43 (1970), 429-438.
Cescon, L., et al., J. Org. Chem. 36 (1971), 2262-2267.
Dehmlow, E., et al., Phase Transfer Catalysis, Verlag Chemie, Weinheim, 1980, pp. 1--3.

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