ul. Vavilova, 117813 Moscow, Russian Federation. Fax: 007 (095) 5085Bis(p-fluorophenylethynyl) derivatives were obtained by the reaction of bisbromoaromatic compounds with p-fluorophenylacetylene in the presence of a Pd catalyst. Subsequent oxidation of these products using an h--DMSO system led to new bis(p-fluorophenylglyoxalyl)ketones, a-diketones, and heterocyclic compounds.

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New Activated Bisfluoroaromatic Compounds.-Palladium catalyzed cross-coupling of the bis(phenyl bromides) (I) with acetylene (II) gives the bis (fluorophenylethynyl) derivatives ( III) which are smoothly oxidized to the corresponding bis( fluorophenylglyoxalyl) derivatives (IV). Compounds (IV) can be used in the synthesis of polyethers showing liquid crystalline properties. -(RUSANOV, A. L.; KESHTOV, M. L.; BELOMOINA, N. M.; MIKITAEV, A. K.; SARKISYAN, G. B.; KESHTOVA, S. V.; Izv.

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Synthesis of New Bis(p-(phenylethynyl)phenyl)hetarylenes and Bis(p-( phenylglyoxalyl)phenyl)hetarylenes.-The synthesis of new bis(p-(phenylethynyl)phenyl)hetarylenes (III) by cross-coupling of dibromoarenes (I) with phenylacetylene (II), and their oxidation to the corresponding p-(phenylglyoxalyl)phenyl derivatives (IV) is presented. -(KESHTOV, M. L.; RUSANOV, A. L.; BELOMOINA, N. M.; MIKITAEV, A. K.; SARKISYAN, G. B.; BEGRETOV, M. M.; Izv.