Keiichi Akimoto

Generation and dienophilic reactivity of α-oxoselenoaldehydes and ketones

Abstract The reaction of elemental selenium with sulfur ylides stabilized by electron-withdrawing substituent(s) affords a facile method for generation of functionalized selenocarbonyl compounds, which can be effectively trapped by Diels-Alder reaction with 1,3-dienes.

1,3-Dimethylimidazolidiniodithioacetates; stable inner salts having a 1,4-dipolar structure

Abstract Addition of carbon disulfide to 2-isopropylidene- and 2-methylene-1,3-dimethylimidazolidines gave the thermally stable, crystalline inner salts, 1,3-dimethylimidazolidiniodithioacetates (10 and 12), where carbenium ion and dithiocarboxylate parts are insulated by an sp3 carbon atom. X-Ray diffraction analyses of these compounds and the reaction of 10 with DMAD are described.

REACTIONS OF BENZYNE WITH SULFUR COMPOUNDS

Abstract The present review deals with the reactions of benzyne with all kinds of sulfur compounds, irrespective of their organic or inorganic nature. The references cover all of reactions reported after conclusive evidence for the existence of benzyne as the reactive intermediate had been obtained. Emphasis will be placed on both mechanistic and synthetic points of view.