Synthesis of alkynyltellurides mediated by K<sub>3</sub>PO<sub>4</sub> and DMSO
作者:Manoela do Sacramento、Larissa Menezes、Bruna Goldani、Gelson Perin、Marcio S. Silva、Thiago Barcellos、Diego Alves
DOI:10.1039/c9nj01995b
日期:——
In the present work, a simple method for the synthesis of alkynyltellurides is described by the reactions of terminal alkynes with diorganyl ditellurides in the presence of a catalytic amount of K3PO4. In both substrates, it was possible to vary the aryl and alkyl groups, obtaining the products of interest in short reaction times and in yields ranging from 30 to 93%. This methodology, different from
在目前的工作中,描述了一种简单的合成炔基碲化物的方法,该方法是在催化量的K 3 PO 4存在下,末端炔烃与二有机基二碲化物反应。在两种底物中,都可以改变芳基和烷基,从而以较短的反应时间和30%至93%的产率获得目标产物。该方法与文献中已经报道的方法不同,具有使用催化量的弱碱而不使用金属催化剂的优点。
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。