Solvent-Controlled Halo-Selective Selenylation of Aryl Halides Catalyzed by Cu(II) Supported on Al<sub>2</sub>O<sub>3</sub>. A General Protocol for the Synthesis of Unsymmetrical Organo Mono- and Bis-Selenides
作者:Tanmay Chatterjee、Brindaban C. Ranu
DOI:10.1021/jo401062k
日期:2013.7.19
Alumina-supported Cu(II) efficiently catalyzes selenylation of aryl iodides and aryl bromides by diaryl, dialkyl, and diheteroaryl diselenides in water and PEG-600, respectively, leading to a general route toward synthesis of unsymmetrical diaryl, aryl–alkyl, aryl–heteroaryl, and diheteroaryl selenides. A sequential reaction of bromoiodobenzene with one diaryl/diheteroaryl/dialkyl diselenide in water and another
氧化铝负载的Cu(II)分别在水和PEG-600中有效地催化二芳基,二烷基和二杂芳基二硒化物对芳基碘化物和芳基溴化物的硒化,从而通向合成不对称二芳基,芳基-烷基,芳基-杂芳基和二杂芳基硒化物。在第二步中,溴碘代苯与一种二芳基/二杂芳基/二烷基二硒化物和另一种二芳基/二杂芳基/二烷基二硒化物在水中的顺序反应在第二步中产生不对称的二芳基,二杂芳基或芳基-烷基双-硒基苯。通过该方案,可以高收率获得功能化的有机单硒化物和双硒化物的文库,包括一个有效的生物活性分子和一对生物活性硒化物的类似物。反应是化学选择性的和高产率的。铜铝2O 3催化剂可循环使用七次,而不会损失任何活性。