多么一对!据报道,分子内 C(sp 3 ) N 偶联可提供氮杂环。该反应通过用碘氧化苄型 C,N-二价阴离子进行,并建立在合成天然产物 lyconadin A 期间的早期发现的基础上。目前的研究使用具有较低酸性 C H 键和较低活性氮亲核试剂的构象无偏底物. ZnCl 2被确定为一种重要的添加剂。
The first zinc-catalyzed oxidativeamidation of benzylalcohols has been developed. Both aliphatic and aromatic amines can be tolerated and applied in this reaction. Various amides were prepared in good yields undersolvent-free and mild conditions.
A copper-catalysed amidation of aldehydes via N-hydroxysuccinimide ester formation
作者:Monica Pilo、Andrea Porcheddu、Lidia De Luca
DOI:10.1039/c3ob41440j
日期:——
A copper-catalysed oxidative amidation of aldehydes via N-hydroxysuccinimide ester formation is reported. The methodology employed to prepare amides directly fromaldehydes has a very wide scope, is high yielding, and does not need dry conditions. This cross-coupling reaction appears to be simple and makes use of cheap, abundant and easily available reagents.
A phosphine-free Pd catalyst for the selective double carbonylation of aryl iodides
作者:Verónica de la Fuente、Cyril Godard、Ennio Zangrando、Carmen Claver、Sergio Castillón
DOI:10.1039/c2cc17124d
日期:——
The first phosphine-free Pd-catalysed double carbonylation of aryl iodides is reported as a general and practical method, giving excellent conversions and selectivities for a wide range of aryl iodides and amine nucleophiles under atmospheric CO pressure.
Aqueous Benzylic C–H Trifluoromethylation for Late-Stage Functionalization
作者:Shuo Guo、Deyaa I. AbuSalim、Silas P. Cook
DOI:10.1021/jacs.8b08547
日期:2018.10.3
The installation of trifluoromethylgroups has become an essential step across a number of industries such as agrochemicals, drug discovery, and materials. Consequently, the rapid introduction of this critical functional group in a predictable fashion would benefit current practitioners in those fields. This communication describes a mild trifluoromethylation of benzylic C-H bonds with high selectivity