Improved Process for the Palladium-Catalyzed C–O Cross-Coupling of Secondary Alcohols
作者:Hong Zhang、Paula Ruiz-Castillo、Alexander W. Schuppe、Stephen L. Buchwald
DOI:10.1021/acs.orglett.0c01668
日期:2020.7.17
An improved protocol for the Pd-catalyzed C–O cross-coupling of secondaryalcohols is described. The use of biaryl phosphine L2 as the ligand was key to achieving efficient cross-coupling of (hetero)aryl chlorides with only a 20% molar excess of the alcohol. Additionally, we observed an unusual reactivity difference between an electron-rich aryl bromide and the analogous aryl chloride, and deuterium-labeling