I2/Cu-mediated self-sorting domino reaction of aryl β-ketoesters into symmetrical 2-carboalkoxy-1,4-enediones: application to synthesis of pyrazine, β-carboline and quinoxalines
2-a]pyridines from easily available starting materials: Aromaticketones, α,β-unsaturatedketones, β-keto esters and 2-aminopyridines. The present reaction proceeded well in MeOH under the media of I2/CuO. By using this method, the marketed drug zolimidine could be prepared easily with 95% yield. All these target products were characterized by NMR, HRMS and IR spectra. Furthermore, the target compound 3fa was determined
Efficient microwave induced direct α-halogenation of carbonyl compounds
作者:Jong Chan Lee、Jin Young Park、So Young Yoon、Yong Hun Bae、Seung Jun Lee
DOI:10.1016/j.tetlet.2003.10.133
日期:2004.1
A novel and direct method for the synthesis of α-halocarbonyl compounds using sequential treatment of carbonyl compounds with [hydroxy(tosyloxy)iodo]benzene followed by magnesium halides under solvent-free microwave irradiation conditions is described.
I2/CuO-catalyzed tandem cyclization strategy for one-pot synthesis of substituted 2-aminothiozole from easily available aromatic ketones/α,β-unsaturated ketones and thiourea
A concise and efficient one-pot process from easily available methyl ketones/unsaturated methyl ketones and thiourea was developed for the synthesis of 2-aminothiazoles under the media of I2/CuO. The method can highly stereoselectivity obtain the E-isomers of 4-ethenyl-2-aminothiazoles (5a–f). All these target molecules were characterized by NMR, HRMS and IR spectra. Furthermore, the target compounds
Iodination of Enol Acetates and 1,3-Diones Using<i>N</i>-Iodosaccharin
作者:Darko Dolenc
DOI:10.1081/scc-120022182
日期:2003.1.8
Abstract Iodination of enolacetates and 1,3-diones with N-iodosaccharin yielding the corresponding α-iodoketones and 2-iodo-1,3-diones is presented. Reactions are carried out at room temperature under neutral conditions and in short reaction times.