Direct <i>N</i><sup>9</sup>-arylation of purines with aryl halides
作者:Anders Foller Larsen、Trond Ulven
DOI:10.1039/c3cc48642g
日期:——
The reported protocol is the first to be demonstrated to efficiently couple aryl halides to purines with predictable selectivity.
据报道的协议是第一个被证明能有效地将芳基卤化物与嘌呤以可预测的选择性偶联的协议。
<i>N</i>-Arylation of (hetero)arylamines using aryl sulfamates and carbamates <i>via</i> C–O bond activation enabled by a reusable and durable nickel(0) catalyst
elemental analysis techniques. The reaction proceeded via carbon–oxygen bondcleavage of (hetero)aryl carbamates and sulfamates under simple and mild conditions without the use of any external ligands. This method demonstrated functional group tolerance in the N-arylation of various nitrogen-containing compounds as well as aliphatic amines, anilines, pyrroles, pyrazoles, imidazoles, indoles, and indazoles
已经开发出了一种有效且通用的芳基胺化方案,使用了可磁回收的Ni(0)基纳米催化剂。该新型稳定催化剂是在EDTA改性的Fe 3 O 4 @SiO 2上制备的,并通过FT-IR,EDX,TEM,XRD,DLS,FE-SEM,XPS,NMR,TGA,VSM,ICP和元素分析技术进行了研究。该反应通过在简单温和的条件下不使用任何外部配体的情况下,通过(杂)芳基氨基甲酸酯和氨基磺酸酯的碳-氧键裂解来进行。该方法证明了N中的官能团耐受性各种含氮化合物以及脂肪族胺,苯胺,吡咯,吡唑,咪唑,吲哚和吲唑的芳基化,收率良好。此外,该催化剂可以通过使用外部磁场容易地回收,并且可以直接重复使用至少六次而不会显着降低其活性。
Potential Purine Antagonists. XIX. Synthesis of Some 9-Alkyl(aryl)-2-amino-6-substituted Purines and Related V-Triazolo [d]pyrimidines<sup>1</sup>
作者:Henry C. Koppel、Darrell E. O'Brien、Roland K. Robins