A simple and efficient radical coupling of 2-isocyanobiphenyl with ethers was developed, providing a variety of 6-alkylated phenanthridines. Both cyclic and acyclic ethers are suitable substrates for this transformation, which comprised the functionalization of two C-H bonds: the sp3 C-H of ether and sp2 C-H of phenyl group. The kinetic isotope effect (KIE) revealed that the cleavage of sp3 C-H bond would be involved in the rate-determining step.
开发了一种简单高效的
2-异氰基联苯与醚的偶联反应,生成多种6-烷基化的
吩噻嗪。环状和非环状醚均可作为该反应的底物,涉及两个C-H键的功能化:醚的sp3 C-H键和苯基的sp2 C-H键。动力学同位素效应(KIE)表明,sp3 C-H键的断裂是决速步。