123271-58-9Relevant academic research and scientific papers
Generation of pyrrolo[2,3-d]pyrimidines. Unexpected products in the multicomponent reaction of 6-aminopyrimidines, dimedone, and arylglyoxal
Quiroga, Jairo,Acosta, Paola A.,Cruz, Silvia,Abonía, Rodrigo,Insuasty, Braulio,Nogueras, Manuel,Cobo, Justo
experimental part, p. 5443 - 5447 (2010/10/21)
A series of 6-aryl-5-(1-cyclohexen-1-yl)pyrrolo[2,3-d]pyrimidines 9a-q were obtained by the three-component reaction between 6-aminopyrimidines 6, 7, 8, dimedone 2, and arylglyoxal 5a,b. The unexpected cyclization process was established by NMR and X-ray diffraction measurements.
Chemistry of Free Cyclic Vicinal Tricarbonyl Compounds ('1,2,3-Triones'). Part 3. Polar and Redox Reactions of 1,2,3-Triones with Enamines of Different Types - News on Oxonol Dyes, Radicals, and Biradicals
Schank, Kurt,Lieder, Robert,Lick, Carlo,Glock, Rebecca
, p. 869 - 924 (2007/10/03)
The central C=O groups of cyclic 1,2,3-triones possess outstanding electrophilic (electron-pair-accepting) as well as oxidizing (one-electron-accepting) properties. Thus, 1,2,3-triones are chemically related to 1,2- and 1,4-benzoquinones. Whereas polar reactions with carbanion-like (electron rich) species give rise to nucleophilic addition reactions to C=O groups under exclusive C,C-bond formation, SET (single-electron transfer) or redox reactions effect a partial 'carbonyl Umpolung' via ketyl intermediates (C,C- and/or C,O-bond formation). Here, we report on numerous reactions between electron-rich, more- or less-polar enamines with 5,5-dimethylcyclohexane-1,2,3-trione (9a) and 1H-indene-1,2,3-trione (9b). Various new derivatives of basic oxonol dyes were formed, including the first oxonol dye incorporating a 1,3-dioxocyclohexyl moiety. A novel stable radical, 50/50′, was obtained from 9b and lla via addition, hydrolysis, and treatment with conc. H2SO4. Radical 50/50′ represents a vinylogous 'monodehydroreductone' and is, thus, related to monodehydroascorbic acid (143), to Russell's radical cation (144), to indigo (141/141′), and to quinhydrone.
Oxidative α coupling of carbonyl compounds via the condensation of acylated triazolinedione ylides with enolates: A facile synthesis of polyacylated olefins
Wilson, R. Marshall,Hengge, Alvan C.,Ataei, Ali,Ho, Douglas M.
, p. 7240 - 7249 (2007/10/02)
α-Urazolyl ketones are readily oxidized to acylated N-phenyltriazolinedione ylides with tert-butyl hypochlorite. These ylides, usually as generated in situ, undergo condensations with enolate species to form acylated olefins in synthetically useful yields
