Synthesis of arylselanyl-1H-1,2,3-triazole-4-carboxylates by organocatalytic cycloaddition of azidophenyl arylselenides with β-keto-esters
作者:Natália Seus、Loren C. Gonçalves、Anna M. Deobald、Lucielli Savegnago、Diego Alves、Márcio W. Paixão
DOI:10.1016/j.tet.2012.10.007
日期:2012.12
The β-enaminone–azide cycloaddition has been used for the synthesis of arylselanyl-1H-1,2,3-triazole-4-carboxylates by reaction of azidophenylarylselenides with β-keto-esters. The cycloaddition reactions were performed under mild conditions, reacting various azidophenylarylselenides and β-keto-esters using catalytic amount of Et2NH (1 mol %) and the corresponding products were obtained in good to
β-烯胺基-叠氮化物环加成反应已用于通过叠氮苯基芳基硒化物与β-酮酸酯的反应合成芳基戊基-1 H -1,2,3-三唑-4-羧酸酯。环加成反应在温和的条件下进行,使用催化量的Et 2 NH(1 mol%)使各种叠氮苯基芳基硒化物和β-酮酸酯反应,并以良好或优异的收率获得了相应的产物。使用聚焦微波辐射的反应将这种有机催化方案的反应时间从数小时减少到几分钟,这使得该方案非常有用,并且是合成高官能化1,2,3-三唑的一种有吸引力的方法。
Ultrasound-promoted organocatalytic enamine–azide [3 + 2] cycloaddition reactions for the synthesis of ((arylselanyl)phenyl-1<i>H</i>-1,2,3-triazol-4-yl)ketones
作者:Gabriel P Costa、Natália Seus、Juliano A Roehrs、Raquel G Jacob、Ricardo F Schumacher、Thiago Barcellos、Rafael Luque、Diego Alves
DOI:10.3762/bjoc.13.68
日期:——
The use of sonochemistry is described in the organocatalytic enamine-azide [3 + 2] cycloadditionbetween 1,3-diketones and aryl azidophenyl selenides. These sonochemically promoted reactions were found to be amenable to a range of 1,3-diketones or aryl azidophenyl selenides, providing an efficient access to new ((arylselanyl)phenyl-1H-1,2,3-triazol-4-yl)ketones in good to excellent yields and short
Phenylselanyl-1H-1,2,3-triazole-4-carbonitriles: synthesis, antioxidant properties and use as precursors to highly functionalized tetrazoles
作者:Lucielli Savegnago、Manoela do Sacramento、Lucimar M. P. Brod、Mariana G. Fronza、Natália Seus、Eder J. Lenardão、Márcio W. Paixão、Diego Alves
DOI:10.1039/c5ra22445d
日期:——
We describe herein our results on the synthesis, antioxidant properties and chemical diversification of phenylselanyl-1H-1,2,3-triazole-4-carbonitriles.