Solvent-free palladium-catalyzed C O cross-coupling of (hetero)aryl halides with primary alcohols
作者:Sergey A. Rzhevskiy、Maxim A. Topchiy、Vasilii N. Bogachev、Lidiya I. Minaeva、Ilia R. Cherkashchenko、Konstantin V. Lavrov、Grigorii K. Sterligov、Mikhail S. Nechaev、Andrey F. Asachenko
DOI:10.1016/j.mencom.2022.03.035
日期:2022.3
A new efficient solvent-free procedure for the CO cross-coupling between (hetero)arylhalides with phenols, primary alkanols, or (hetero)arylmethanols using Pd2(dba)3/ButBrettPhos catalytic system is proposed using 23 examples.
使用 Pd 2 (dba) 3 /Bu t BrettPhos 催化体系,提出了一种新的有效的无溶剂方法,用于(杂)芳基卤化物与酚、伯烷醇或(杂)芳基甲醇之间的 CO 交叉偶联,并使用 23 个示例。
Ruthenium-Catalyzed Regioselective 1,4-Hydroboration of Pyridines
Simple ruthenium precursor [Ru(p-cymene)Cl-2](2) I catalyzed regioselective 1,4-dearomatization of pyridine derivatives using pinacolborane is reported. Two catalytic intermediates, [Ru(p-cymene)Cl2Py] 2 and [Ru(p-cymene)Cl-2(P-Cy)(3))] 3, involved in this process are identified, independently synthesized, characterized, and further used directly as effective catalysts; two more catalytic intermediates [Ru(p-cymene)Cl-2(Py)(P(Cy)(3))] 4 and [Ru(p-cymene) (H)Cl(Py)(P-CA)] 5 are identified in solution. Complex 5 is the active catalytic intermediate. An intramolecular selective 1,5-hydride transfer in 5 leading to the regioselective 1,4-hydroboration of pyridine compounds is proposed.
ATTALLA, M. I.;BURNETT, G. R.;SUMMERS, L. A., J. HETEROCYCL. CHEM., 1985, 22, N 2, 319-320