A facile and regioselective base-mediated aerobicoxidative acylation of nitroarenes to access diarylketones undermildconditions has been developed. It features the use of bench-stable and readily available arylacetates as acyl surrogates, and the absence of transition-metals and synthetic oxidants. This protocol involves a cascade CDC/oxidative decarboxylation process.
Transition metal-free direct dehydrogenative arylation of activated C(sp<sup>3</sup>)–H bonds: synthetic ambit and DFT reactivity predictions
作者:Kaitlyn Lovato、Lirong Guo、Qing-Long Xu、Fengting Liu、Muhammed Yousufuddin、Daniel H. Ess、László Kürti、Hongyin Gao
DOI:10.1039/c8sc02758g
日期:——
DFT calculations provided a predictive model, which states that substrates containing a C(sp3)–H bond with a sufficiently low pKa value should readily undergo arylation. The DFT prediction was confirmed through experimental testing of nearly a dozen substrates containing activated C(sp3)–H bonds. This arylation method was also used in a one-pot protocol to synthesize over twenty compounds containing
已开发出一种无过渡金属的脱氢方法,用于直接活化多种活化的C(sp 3)-H键。这种操作简单且对环境友好的好氧芳构化反应使用叔-BuOK为基础,硝基芳烃为亲电子试剂,可制备多达克数量的结构多样的α-芳基化酯,酰胺,腈,砜和三芳基甲烷(超过60个实例)。DFT计算提供了一个预测模型,该模型指出,含有C(sp 3)-H键且p K a值足够低的底物应易于芳构化。通过对包含活化C(sp 3)– H键。这种芳基化方法还用于一锅法操作,以合成超过20种包含全碳四元中心的化合物。