Copper-Catalyzed Annulation: A Method for the Systematic Synthesis of Phenanthridinium Bromide
作者:Yuan-Ye Jhang、Tai-Ting Fan-Chiang、Jun-Min Huang、Jen-Chieh Hsieh
DOI:10.1021/acs.orglett.6b00269
日期:2016.3.4
in situ formed biaryl imine as a substrate. Tolerance of a very wide variety of N-substituents is indicated; this has never previously been disclosed by other reports. Application of this method to synthesis of the natural alkaloid bicolorine, and its derivatives, was also carried out in only three synthetic steps from commercially available compounds.
报道了铜催化的菲啶鎓溴化物的铜催化系统合成的新方法。通过使用原位形成的联芳基亚胺作为底物直接构建中央吡啶鎓核心,可以实现这种转化。指出了多种N-取代基的耐受性;其他报告以前从未披露过这一点。从市售化合物仅在三个合成步骤中也进行了该方法在天然生物碱双色氨酸及其衍生物的合成中的应用。