One-pot synthesis of phosphorylnaphth[2,1-<i>d</i>]oxazoles and products as P,N-ligands in C–N and C–C formation
作者:Lingteng Peng、Zhifang Hu、Yanting Zhao、Lifen Peng、Zhi Xu、Shuang-Feng Yin、Zilong Tang、Renhua Qiu、Nobuaki Kambe
DOI:10.1039/d2ob00565d
日期:——
The reaction was facilely scaled up to give N-benzylaniline 15a in a gram scale synthesis. This research provided a facile and convenient protocol to synthesize phosphanylnaphtho[2,1-d]oxazoles, which could be applied as an efficient P,N-ligand in transition-metal-catalyzed C–N and C–C formation to produce the desired products in high yields with wide functional group tolerance under small catalyst loading
通过萘醌与二芳基(烷基)氧化膦的一锅磷酸化和铜催化与亚胺的氧化缩合,然后甲基化和还原,成功合成了膦基萘并[2,1- d ]恶唑。以4-膦基萘并[2,1- d ]恶唑为P,N-螯合配体,Pd催化C-N生成胺或硝基苯以及Ni催化C-C生成和喹啉合成成功进行. 反应很容易放大以在克级合成中得到N-苄基苯胺15a 。本研究为合成膦基萘[2,1- d]恶唑,可用作过渡金属催化的 C-N 和 C-C 形成中的有效 P,N-配体,在小催化剂负载、无溶剂的情况下以高收率生产所需产物,具有广泛的官能团耐受性许多反应中的条件。