[EN] NITROGEN-CONTAINING HETEROCYCLIC COMPOUND, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF [FR] COMPOSÉ HÉTÉROCYCLIQUE CONTENANT DE L'AZOTE, SON PROCÉDÉ DE PRÉPARATION ET SON APPLICATION [ZH] 一种含氮杂环化合物、其制备方法及应用
Exploiting the Nucleophilicity of the Nitrogen Atom of Imidazoles: One-Pot Three-Component Synthesis of Imidazo-Pyrazines
作者:Ubaldina Galli、Rejdia Hysenlika、Fiorella Meneghetti、Erika Del Grosso、Sveva Pelliccia、Ettore Novellino、Mariateresa Giustiniano、Gian Cesare Tron
DOI:10.3390/molecules24101959
日期:——
novel one-pot multicomponent reaction to synthesize substituted imidazopyrazines is described. In brief, 1H-(imidazol-5-yl)-N-substituted methanamines react with aldehydes and isocyanides in methanol at room temperature to give imidazopyrazine derivatives in excellent yields. The imidazole nitrogen atom was able to intercept the nascent nitrilium ion, channeling the reaction toward to the sole formation
Copper-Catalyzed Conjugate Additions to Isocyanoalkenes
作者:John-Paul R. Marrazzo、Allen Chao、Yajun Li、Fraser F. Fleming
DOI:10.1021/acs.joc.1c02516
日期:2022.1.7
A copper iodide–Pyox complex catalyzes the first conjugate addition of diverse sulfur, nitrogen, and carbon nucleophiles to isocyanoalkenes. The anionic addition generates metalated isocyanoalkanes capable of SNi displacements, providing a rapid route to a series of functionalized, cyclic isocyanoalkanes. The Cu(I)I–Pyox complex efficiently catalyzes a first-in-class conjugate addition affording a
碘化铜-Pyox 络合物催化多种硫、氮和碳亲核试剂首次共轭加成到异氰基烯烃中。阴离子加成产生能够进行 S N i置换的金属化异氰基烷烃,为一系列官能化的环状异氰基烷烃提供了快速途径。Cu(I)I-Pyox 配合物可有效催化一流的共轭加成,提供一系列复杂的功能化异氰基烷烃,这些异氰基烷烃在合成方面具有挑战性,同时为保持异氰化物基团的催化反应奠定了基础。
A series of histamine (HST)-related compounds were synthesized and tested for their activating properties on five physiologically relevant human CarbonicAnhydrase (hCA) isoforms (I, II, Va, VII and XIII). The imidazole ring of HST was replaced with different 5-membered heterocycles and the length of the aliphatic chain was varied. For the most interesting compounds some modifications on the terminal
合成了一系列与组胺 (HST) 相关的化合物,并测试了它们对五种生理相关的人碳酸酐酶 (hCA) 同种型(I、II、Va、VII 和 XIII)的激活特性。HST的咪唑环被不同的5元杂环取代,脂肪链的长度也不同。对于最有趣的化合物,还对末端氨基进行了一些修饰。对活化最敏感的同种型是 hCA I(KA 值在低微摩尔范围内),但令人惊讶的是,没有一种新化合物显示出对 hCA II 的活性。一些衍生物(1、3a 和 22)对激活 hCA I 的选择性优于对 hCA II、Va、VII 和 XIII 的激活。
[EN] NITROGEN-CONTAINING HETEROCYCLIC COMPOUND, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF<br/>[FR] COMPOSÉ HÉTÉROCYCLIQUE CONTENANT DE L'AZOTE, SON PROCÉDÉ DE PRÉPARATION ET SON APPLICATION<br/>[ZH] 一种含氮杂环化合物、其制备方法及应用