Murahashi Cross‐Coupling at −78 °C: A One‐Pot Procedure for Sequential C−C/C−C, C−C/C−N, and C−C/C−S Cross‐Coupling of Bromo‐Chloro‐Arenes
作者:Narayan Sinha、Dorus Heijnen、Ben L. Feringa、Michael G. Organ
DOI:10.1002/chem.201901678
日期:2019.7.11
The coupling of organolithium reagents, including strongly hindered examples, at cryogenic temperatures (as low as −78 °C) has been achieved with high‐reactivity Pd‐NHC catalysts. A temperature‐dependent chemoselectivity trigger has been developed for the selective coupling of arylbromides in the presence of chlorides. Building on this, a one‐pot, sequential coupling strategy is presented for the