A new catalytic procedure for atom-transfer radical addition (ATRA) and cyclization (ATRC) reactions is described. The combination of the ruthenium(III) complex [RuCl(2)Cp*(PPh3)] (Cp*: pentamethylcyclopentadienyl) with magnesium allows these reactions to be performed under mild conditions with high efficiency. In most cases, the catalyst concentrations required are significantly lower than those used
Visible light-mediated polychlorination of alkenes <i>via</i> the dichloromethyl radical generated by chloroform and chlorides
作者:Chunying Wu、Xin Hui、Dan Zhang、Minghui Zhang、Yunbo Zhu、Sicen Wang
DOI:10.1039/d1gc04109f
日期:——
We report a novel visiblelight-mediated protocol for polychlorination of alkenes by employing commercially available bulk chemicals, chloroform and chlorides. This methodology enables the installation of multiple chlorine atoms into alkene feedstocks in a single step and provides the corresponding chloroalkanes in high yields under mild reaction conditions. Additionally, this transformation tolerates
Atom‐Transfer Radical Reactions under Mild Conditions with [{RuCl
<sub>2</sub>
(1,3,5‐C
<sub>6</sub>
H
<sub>3</sub>
<i>i</i>
Pr
<sub>3</sub>
)}
<sub>2</sub>
] and PCy
<sub>3</sub>
as the Catalyst Precursors
作者:Laurent Quebatte、Michel Haas、Euro Solari、Rosario Scopelliti、Quoc T. Nguyen、Kay Severin
DOI:10.1002/anie.200462037
日期:2005.2.4
A half-sandwich 1,2-azaborolyl ruthenium complex: synthesis, characterization, and evaluation of its catalytic activities
A half-sandwich 1,2-azaborolyl (Ab) ruthenium complex, (Ab–CCPh)RuCl(PPh3)2 (1), has been synthesized by treating RuCl2(PPh3)3 with lithium 1,2-azaborolide L-1, or by treating either RuCl2(PPh3)3 or RuHCl(PPh3)3 directly with 1,2-azaborole LH-1. It is evaluated as a suitable precatalyst in [2 + 2] cycloadditions of norbornene derivatives with DMAD and in atom transfer radical additions of halogenated compounds with olefins.