Benzylic Arylation of 2-Methyl-5-membered Heterocycles Using TMP-Bases
摘要:
A new general Pd-catalyzed arylation of various 2-methyl-5-membered heterocycles is reported. This novel method requires Li-, Mg-, or Zn-TMP bases and allows selective metalation of the benzylic position. Subsequent Negishi cross-coupling provides the corresponding arylated heterocycles.
Iridium‐Catalyzed Asymmetric Allylic Substitution of Methyl Azaarenes
作者:Xi‐Jia Liu、Wen‐Yun Zhang、Chao Zheng、Shu‐Li You
DOI:10.1002/anie.202200164
日期:2022.5.9
An iridium-catalyzedasymmetricallylic substitution of a variety of methyl azaarenes, including (benzo)thiazole, oxazole, benzoimidazole, pyridine, and (iso)quinoline, is described. The corresponding chiral azaarene derivatives are afforded in good yields with high enantioselectivity (up to 96 % yield and 99 % ee).