A gold-catalyzed oxidation of arylallenes to form α-diketones and aldehydes in good yields is presented. Further directed synthesis of quinoxalines and benzimidazoles, via the condensation of the resulting α-diketones and aldehydes with benzene-1,2-diamine, was achieved in high yields.

In order to study the effect of halogen bond on tautomerism in β-diketones solid-state, we have prepared a series cocrystals derived from an asymmetric β-diketone, benzoyl-4-pyridoylmethane (b4pm), as acceptor and perfluorinated iodobenzenes: iodopentaflourobenzene (ipfb), 1,2-, 1,3- 1,4-diiodotetraflorobenzene (12tfib, 13tfib 14tfib) 1,3,5-triiodo-2,4,6-trifluorobenzene (135titfb). All five ar...

Acylation reaction of a variety of cyclic ketones via acylation of the corresponding enamines is welldefined in the literature. Enamine acylation of carbonyl compounds is a significant synthetic method because of its mildness and the ease of preparing various β-diketones [1-4]. Acylation reactions are performed by means of converting enamines to the enaminoketones and subsequent hydrolysis of t...