A Pd-catalyzed highly selective direct diarylation of pyridines has been developed using a transient activator strategy. Both (MeO)2SO2 and Cu2O are required for this transformation. The in situ generated N-methylpyridinium salt can be arylated at both 2- and 6-positions under the cooperative Pd/Cu catalysis. A subsequent N-demethylation then gives the 2,6-diarylpyridines. This protocol provides a
已使用瞬态活化剂策略开发了Pd催化的吡啶的高选择性直接二芳基化反应。两者(MEO)2 SO 2和Cu 2需要用于该转化O操作。原位生成的N-甲基吡啶盐可以在Pd / Cu协同催化下在2-位和6-位芳基化。然后,随后的N-去甲基化得到2,6-二芳基吡啶。该协议为对称的2,6-二芳基吡啶提供了一种新颖的合成途径。