Synthesis of 6-acyl phenanthridines by oxidative radical decarboxylation–cyclization of α-oxocarboxylates and isocyanides
作者:Jie Liu、Chao Fan、Hongyu Yin、Chu Qin、Guoting Zhang、Xu Zhang、Hong Yi、Aiwen Lei
DOI:10.1039/c3cc49026b
日期:——
A silver catalysed synthesis of 6-acyl phenanthridines by oxidative radical decarboxylation–cyclization of α-oxocarboxylates and isocyanides was developed.
Visible-light-induced tandem radical addition–cyclization of 2-aryl phenyl isocyanides catalysed by recyclable covalent organic frameworks
作者:Shuyang Liu、Wenna Pan、Songxiao Wu、Xiubin Bu、Shigang Xin、Jipan Yu、Hao Xu、Xiaobo Yang
DOI:10.1039/c9gc00022d
日期:——
A visible-light-induced tandemradicaladdition–cyclization sequence via 2-aryl phenyl isocyanides as the starting material and two-dimensional covalent organic frameworks (2D-COFs) as the photocatalyst was developed, delivering multifarious 6-substituted phenanthridines in high yields. Benefitting from the utilization of a heterogeneous photocatalyst, this protocol features easy catalyst separation
the generation of phosphinoyl radicals from the combination of diphenyliodonium salt (Ph2I+,–OTf) with triethylamine (Et3N) in the presence of secondary phosphine oxides is reported. By employing this practical and simple approach, a large variety of 6-phosphorylated phenanthridines have been synthesized through the addition of phosphinoyl radicals to isonitriles as radical acceptors. The reaction works
报道了在仲氧化膦的存在下,由二苯基碘鎓盐(Ph 2 I +,– OTf)与三乙胺(Et 3 N)结合生成膦酰基的新颖有效方法。通过采用这种实用且简单的方法,已经通过向膦腈中添加膦酰基作为自由基受体而合成了多种6-磷酸化的菲啶。在没有任何过渡金属或光催化剂的情况下,该反应可顺利进行。在电子顺磁共振(EPR)和密度泛函理论(DFT)计算的基础上,讨论了该反应的机理。