Photocatalytic xanthate-based radical addition/cyclization reaction sequence toward 2-biphenyl isocyanides: synthesis of 6-alkylated phenanthridines
作者:Pedro López-Mendoza、Luis D. Miranda
DOI:10.1039/d0ob00136h
日期:——
xanthate-based radical addition/cyclization reaction cascade toward 2-biphenylisocyanides is described as a practical and modular approach to 6-alkylated phenanthridines. The use of xanthates as radical precursors allowed the synthesis of diversely 6-substituted phenanthridines. Electrophilic radicals derived from nitriles, aromatic and aliphatic ketones, malonates, and amide derivatives, as well as radicals
面向2-联苯基异氰化物的基于光催化黄原酸酯的自由基加成/环化反应级联反应是6-烷基化菲啶的实用模块化方法。黄药作为自由基前体的使用允许合成多种6-取代的菲啶。成功地引入了衍生自腈,芳族和脂肪族酮,丙二酸酯和酰胺衍生物的亲电子基团,以及衍生自邻苯二甲酰亚胺甲基和苄基衍生物的基团。反应在温和条件下进行,没有化学计量的氧化剂。合成了三十种新型菲啶支架,产率为24%至76%。