CuI nanoparticle-catalyzed synthesis of tetracyclic benzo[<i>e</i>]benzo[4,5]imidazo[1,2-<i>c</i>][1,3]thiazin-6-imine heterocycles by S<sub>N</sub>Ar-type C–S, C–N bond formation from isothiocyanatobenzenes and benzimidazoles
作者:Xiaolong Guo、Luyao Wang、Jing Hu、Mengmeng Zhang
DOI:10.1039/c8ra02552e
日期:——
3]thiazin-6-imine tetracyclic heterocycles via a CuI nanoparticle-catalyzed intramolecular C(sp2)–S coupling reaction is presented. This strategy provides a straightforward method for synthesizing analogs of the anti-HIV drug 3,4-dihydro-2H,6H-pyrimido[1,2-c][1,3]benzothiazin-6-imine (PD 404182). The reaction rate and yield were increased by employing CuI nanoparticles.
本文通过CuI 纳米颗粒催化分子内C ( sp 2 )–S 偶联反应被提出。该策略提供了一种合成抗 HIV 药物 3,4-二氢-2 H ,6 H-嘧啶并[1,2- c ][1,3]苯并噻嗪-6-亚胺 (PD 404182)类似物的简单方法。使用 CuI 纳米粒子提高了反应速率和产率。
Copper-Catalyzed Construction of Benzo[4,5]imidazo[2,1-<i>a</i>]isoquinolines Using Calcium Carbide as a Solid Alkyne Source
作者:Haiyan Liu、Zheng Li
DOI:10.1021/acs.orglett.1c03133
日期:2021.11.5
cross-coupling/nucleophilic addition tandem reactions usingcalciumcarbide as a solidalkynesource, 2-(2-bromophenyl)benzimidazoles as starting materials, and copper as a catalyst is described. The target products can also be synthesized through one-pot three-component reactions of o-phenylenediamines, o-bromobenzaldehydes, and calciumcarbide. Both reaction routes can also be scaled up to gram scale
一种以碳化钙为固体炔烃源,2-(2-溴苯基)苯并咪唑为原料,通过Sonogashira交叉偶联/亲核加成串联反应合成苯并[4,5]咪唑并[2,1- a ]异喹啉的方法材料,并描述了铜作为催化剂。目标产物还可以通过单罐三组分反应合成ö苯二胺类,ø -bromobenzaldehydes,和电石。两种反应路线也可以放大到克级。
Expeditious synthetic approach and photophysical properties of fluorescent benzimidazo[1,2-d]dibenzo[b,f][1,4]diazepine derivatives
A short and efficient synthetic route to novel benzimidazo[1,2-d]dibenzo[b,f][1,4]diazepines has been developed using a copper catalyzed intramolecular Ullmann type C–N bond forming reaction as a key step. Copper iodide and 1,10-phenanthroline furnished the desired compounds in good yield. The products are intensely fluorescent with appreciably long lifetimes. Looking at their prospective use as markers
利用铜催化的分子内Ullmann型C–N键形成反应作为关键步骤,已开发出一种短而有效的合成新型苯并咪唑并[1,2- d ]二苯并[ b,f ] [1,4]二氮杂synthetic的途径。碘化铜和1,10-菲咯啉以高收率提供了所需化合物。该产品具有强烈的荧光性,使用寿命长。展望了它们作为生物大分子标记以及在生化分析中的潜在用途,我们已经探索了这些化合物的光物理性质。分光光度法和荧光分光光度法研究表明,虽然化合物的最大吸光度在UV区,但最大发射量却落在可见(蓝绿色)区。