A general and expedient amination of alcohols catalysed by a single-site (NN)Co(<scp>ii</scp>)-bidentate complex under solventless conditions
作者:Rohit Kumar、Ankit Kumar Srivastava、Palaniyappan Nagarasu、Vedichi Madhu、Ekambaram Balaraman
DOI:10.1039/d3cy00809f
日期:——
Here we designed and synthesized a NN–CoII bidentate complex and efficiently used it for general and expedient amination of alcohols under benign, solventless conditions. Both primary (including unactivated aliphatic) alcohols and sterically hindered secondary alcohols exhibited very good reactivity and provided diverse amines with good substrate scope (88 examples; up to 95% yields) and excellent
在这里,我们设计并合成了 NN-Co II二齿配合物,并有效地将其用于在良性、无溶剂条件下对醇进行常规且方便的胺化。伯醇(包括未活化的脂肪族)和位阻仲醇均表现出非常好的反应活性,并提供多种胺,具有良好的底物范围(88个例子;产率高达95%)和优异的官能团耐受性(甲氧基、硫代甲氧基、苯氧基、三氟甲基、氨基) 、酒精和卤化物,包括溴和碘基团)。此外,还证明了二胺的连续双-N-烷基化。据观察,配体主链中的吡唑部分在胺化反应中起着至关重要的作用。非常有趣的是,成功地证明了本均相钴催化剂的可重复使用性。