The oxidative direct cyclizaion of N-methylanilines with electron-deficientalkenes involving maleimides and benzylidene malononitriles through sp3 and sp2 C–H bond cleavage proceeds effectively under a CuCl2/O2 catalysis to provide the corresponding tetrahydroquinolines in good yields.
在CuCl 2 / O 2催化下,N-甲基苯胺与电子不足的烯烃(包括马来酰亚胺和亚苄基丙二腈)通过sp 3和sp 2的C-H键裂解的直接氧化环化反应可有效地提供相应的四氢喹啉,并具有良好的收率。