three-component tandem reaction has been developed for the convenient and practical synthesis of 1,4-benzothiazines. A variety of terminal alkynes and 2-iodo/bromophenyl isothiocyanates underwent this one-potcyclization with aqueous ammonia to afford 1,4-benzothiazines in moderate to good yields.
Copper(I)-catalyzed cascade reaction of 2-haloaryl isothiocyanates with isocyanides: a strategy to construct benzo[d]imidazo[5,1-b]thiazoles
作者:Wenyan Hao、Xiaoyan Sang、Jing Jiang、Mingzhong Cai
DOI:10.1016/j.tetlet.2016.02.084
日期:2016.3
A copper(I) catalyzed cascadereaction of 2-haloaryl isothiocyanates with isocyanides for the construction of benzo[d]imidazo[5,1-b]thiazoles has been demonstrated. Good to excellent yields could be achieved. This [3+2] cycloaddition and C–S coupling reaction represents an extremely simple way to construct benzo[d]imidazo[5,1-b]thiazoles.
已经证明了铜(I)催化2-卤代芳基异硫氰酸酯与异氰酸酯的反应,可用于构建苯并[ d ]咪唑并[5,1- b ]噻唑。可以实现良好的优良收率。这种[3 + 2]环加成反应和CS偶联反应是构建苯并[ d ]咪唑并[5,1- b ]噻唑的一种极其简单的方法。
Copper(<scp>ii</scp>)-catalyzed cascade Csp<sup>2</sup>–P/C–C bond formation to construct benzo[<i>d</i>]thiazol-2-ylphosphonates
作者:Han Wang、Le Huang、Jun Li、Wenyan Hao
DOI:10.1039/d3ob01256e
日期:——
A novel, copper(II)-catalyzed cascade Csp2–P/C–C bond formation in o-haloaryl isothiocyanates with organophosphorus esters has been developed under mild conditions. A series of benzo[d]thiazol-2-ylphosphonates were synthesized in moderate to good yields. Different from the traditional method of obtaining these scaffolds with radical reactions, the method proposed allows accessing them via ionic reactions
一种新型的铜( II )催化级联Csp 2 –P/C–C键形成在邻卤代芳基异硫氰酸酯与有机磷酯中在温和条件下被开发出来。以中等至良好的产率合成了一系列苯并[ d ]噻唑-2-基膦酸酯。与传统通过自由基反应获得这些支架的方法不同,该方法可以通过离子反应获得它们,具有原料易得、操作简单的优点。最后,我们进行了克级实验,以进一步证明该策略在苯并[ d ]噻唑-2-基膦酸酯的高效合成中的可扩展性。