Regioselective Hydroalkylation of Vinylarenes by Cooperative Cu and Ni Catalysis
作者:Anne K. Ravn、Martin B. Johansen、Troels Skrydstrup
DOI:10.1002/anie.202112390
日期:2022.1.21
A dual Cu/Ni catalytic system is identified for linear selective hydroalkylation of vinylarenes with complementary regioselectivities to similar catalytic systems. Turnover numbers (TONs) with respect to Ni are as high as 72, and Cu is revealed to accelerate the rate of formation of the linear alkyl nickel intermediate. Examples for the diversification of pharmaceuticals are also demonstrated.
确定了一种双铜/镍催化体系,用于乙烯基芳烃的线性选择性加氢烷基化,与类似的催化体系具有互补的区域选择性。相对于 Ni 的周转数 (TON) 高达 72,并且显示 Cu 加速了直链烷基镍中间体的形成速率。还展示了药物多样化的例子。
Access to Aryl and Heteroaryl Trifluoromethyl Ketones from Aryl Bromides and Fluorosulfates with Stoichiometric CO
作者:Martin B. Johansen、Oliver R. Gedde、Thea S. Mayer、Troels Skrydstrup
DOI:10.1021/acs.orglett.0c01117
日期:2020.6.5
trifluoromethyl ketones starting from readily accessible aryl bromides and fluorosulfates, the latter easily prepared from the corresponding phenols. The methodology utilizes low pressure carbon monoxide generated ex situ from COgen to generate Weinreb amides as reactive intermediates that undergo monotrifluoromethylation affording the corresponding aromatic trifluoromethyl ketones (TFMKs) in good