Magnetic nanoparticle-supported eosin Y ammonium salt: An efficient heterogeneous catalyst for visible light oxidative C–C and C–P bond formation
作者:Pinhua Li、Guan-Wu Wang、Xianjin Zhu、Lei Wang
DOI:10.1016/j.tet.2019.04.071
日期:2019.6
such as nitroalkanes, malononitrile, dimethyl malonate and H-phosphonate diesters were achieved by using a magnetic nanoparticle-supported eosin Y bis-benzyltriethylammonium salt (MNPs-Eosin Y) as catalyst and air as the sole oxidant, affording the corresponding products in good to excellent yields under mild reaction conditions. Notably, the supported eosin Y catalyst can easily be separated from the
四氢异喹啉衍生物中与氮原子相邻的sp 3 C–H键与前亲核试剂如硝基烷,丙二腈,丙二酸二甲酯和H-膦酸酯二酯的高效可见光介导的C–C和C–P偶联反应得以实现。磁性纳米颗粒负载的曙红Y以双苄基三乙基铵盐(MNPs-曙红Y)为催化剂,空气为唯一的氧化剂,在温和的反应条件下可提供相应的产物,收率良好至优异。值得注意的是,负载的曙红Y催化剂可以容易地通过外部永磁体与反应混合物分离,并且可以循环至少八次而不会显着降低活性。