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。
Direct synthesis of benzimidazoles by Pd(II) N^N^S-pincer type complexes via acceptorless dehydrogenative coupling of alcohols with diamines
作者:Pennamuthiriyan Anandaraj、Rengan Ramesh、Jan Grzegorz Malecki
DOI:10.1016/j.jorganchem.2022.122577
日期:2023.2
geometry of the synthesized complexes 1 and 2 was confirmed by single-crystal X-ray diffraction study. A wide range of benzimidazole derivatives (32 examples) up to 94% isolated yield has been derived via acceptorlessdehydrogenative coupling of primary alcohols with derivatives of o-phenylenediamines. The present protocol operates smoothly with only 1 mol% catalyst loading. Furthermore, the mechanistic