An efficient and general procedure for the synthesis of alkynyl chalcogenides (selenides and tellurides) by alumina-supported Cu(II)-catalyzed reaction of alkynyl bromides and diphenyl dichalcogenides
作者:Sabir Ahammed、Sukalyan Bhadra、Debasish Kundu、Bojja Sreedhar、Brindaban C. Ranu
DOI:10.1016/j.tet.2012.08.046
日期:2012.12
catalyzes the reaction of alkynyl bromides and diphenyldiselenides and ditellurides in presence of Zn dust or indium(I) bromide to provide the corresponding alkynyl selenides and tellurides. The reactions of a wide variety of substituted alkynyl bromides have been addressed. The zinc dust or InBr is required for the cleavage of diphenylselenides/tellurides. The mechanism of the reaction is established
在锌粉或溴化铟(I)的存在下,氧化铝(Al 2 O 3)负载的铜(II)有效催化炔基溴化物与二苯基二硒化物和二碲化物的反应,从而提供相应的炔基硒化物和碲化物。已经解决了多种取代的炔基溴的反应。裂解二苯硒化物/碲化物需要锌粉或InBr。建立了反应机理。产品的产率很高,并且催化剂被回收。