TsCl-promoted sulfonylation of quinoline N-oxides with sodium sulfinates in water
作者:Sha Peng、Yan-Xi Song、Jun-Yi He、Shan-Shan Tang、Jia-Xi Tan、Zhong Cao、Ying-Wu Lin、Wei-Min He
DOI:10.1016/j.cclet.2019.08.002
日期:2019.12
sulfonylation of heteroaromaticN-oxides with sodium sulfinates in water at ambient temperature under metal- and oxidant-free conditions has been developed. The mild reaction conditions, high reaction efficiency, operational simplicity, short reaction time and remarkable functional-group compatibility make the developed protocol very attractive for the preparation of 2-sulfonyl N-heteroaromatic compounds.
A simple and efficient method has been developed for construction of sulfonylated quinolines via coupling of haloquinolines and sulfonylchlorides in water. The present methodology provides an attractive approach to various sulfonylated quinolines in moderate to good yields with favorable functional group tolerance, which has the advantages of operation simplicity, readily available starting materials
A base-free, ultrasound accelerated one-pot synthesis of 2-sulfonylquinolines in water
作者:Long-Yong Xie、Yong-Jian Li、Jie Qu、Yue Duan、Jue Hu、Kai-Jian Liu、Zhong Cao、Wei-Min He
DOI:10.1039/c7gc02304a
日期:——
enhances the reaction rate but also minimizes the side reactions. This process has a broad substrate scope, mild reaction conditions, good yields, excellent chemo- and regioselectivities, operational simplicity, ease of scale-up and high energy efficiency. In addition, the process is remarkably greener than the previous routes with an atom economy of 70.7%, an E-factor of 1.17 and an eco-scale score of
Fast sulfonylation of pyridine/quinoline N-oxides induced by iodine is demonstrated herein. The regioselective protocol occurs under metal-free conditions in a short reaction time (10 min), exhibiting high efficiency (up to 92% yield) and good compatibility (up to 33 examples). A gram-scale reaction was conducted with only a slight loss of production.
A smart H-phosphonate-mediated synthetic strategy for the sulfonylation of heteroaromatic N-oxides has been developed in one pot under metal-free conditions at room temperature.