Selective Gold-Catalysed Synthesis of Cyanamides and 1-Substituted 1<i>H</i>
-Tetrazol-5-Amines from Isocyanides
作者:Karel Škoch、Ivana Císařová、Petr Štěpnička
DOI:10.1002/chem.201803252
日期:2018.9.18
The newly discovered gold‐catalysed reaction of isocyanides with hydrazoic acid generated in situ from trimethylsilyl azide and methanol (or, alternatively, from NaN3/AcOH) produces either cyanamides or 1‐substituted 1H‐tetrazol‐5‐amines, depending on the amount of available HN3. The reaction proceeds selectively and in generally high yields of either product, thus providing a particularly convenient
Cyanamides are an important class of molecules. This work describes a facile synthesis of disubstitutedcyanamides. Here, readily accessible 1-cyano-1, 2-benziodoxol-3-(1H)-one (CBX) was applied as a stable electrophilic cyanation reagent. Diverse secondaryamines were effectively cyanated. Moreover, secondary sulfonamides proved to be suitable substrates and were readily converted to N-alkyl(aryl
Copper-promoted N-cyanation of aliphatic sec-amine by CuCN is achieved via oxidative coupling. This procedure employs O2 as a clean oxidant. Notably, sulfoximines and 1,1,3,3-tetramethylguanidine also worked well in this procedure. Thus, it represents a key progress in the C–N bond formation reaction as well as in the cyanation reaction.
<i>N</i>
‐Cyanation of Primary and Secondary Amines with Cyanobenzio‐doxolone (CBX) Reagent
作者:Zimin Chen、Weiming Yuan
DOI:10.1002/chem.202102354
日期:2021.10.25
An efficient electrophilic N-cyanation of amines with a stable and less-toxic cyanobenziodoxole reagent towards the synthesis of cyanamides is disclosed. This synthetically practicable strategy allows the construction of a wide variety of cyanamides under very mild and simple conditions with a broad functional group compatibility, and showcases a huge potential in late-stage modification of complex
From Dinitrogen to N‐Containing Organic Compounds: Using Li
<sub>2</sub>
CN
<sub>2</sub>
as a Synthon
作者:Li‐Jun Wu、Qianru Wang、Jianping Guo、Junnian Wei、Ping Chen、Zhenfeng Xi
DOI:10.1002/anie.202219298
日期:——
A strategy for the conversion of inert N2 into various nitrogen-containing organic compounds is presented. The activated N-containing species Li2CN2 is successfully prepared in high yields from N2 gas, C and LiH. Li2CN2 can be transformed into a range of N-containing organic compounds, including cyanamides, carbodiimides, N-aryl cyanamides and 1,2,4-triazole derivatives. 15N-labeled products, including
介绍了一种将惰性 N 2转化为各种含氮有机化合物的策略。活性含氮物质Li 2 CN 2成功地从N 2气体、C和LiH中以高产率制备。Li 2 CN 2可以转化为一系列含氮有机化合物,包括氰胺、碳二亚胺、N-芳基氰胺和1,2,4-三唑衍生物。还从15 N 2气体制备了 15 N-标记的产物,包括恶唑烷衍生物。