Atom-Transfer Radical Addition (ATRA) and Cyclization (ATRC) Reactions Catalyzed by a Mixture of [RuCl2Cp*(PPh3)] and Magnesium
作者:Katrin Thommes、Burçak Içli、Rosario Scopelliti、Kay Severin
DOI:10.1002/chem.200700442
日期:2007.8.17
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
描述了一种用于原子转移自由基加成(ATRA)和环化(ATRC)反应的新催化程序。钌(III)配合物[RuCl(2)Cp *(PPh3)](Cp *:五甲基环戊二烯基)与镁的结合使这些反应可以在温和的条件下高效地进行。在大多数情况下,所需的催化剂浓度明显低于先前报道的程序中使用的浓度。建议镁充当还原剂,其产生和再生催化活性的钌(II)物种。通过X射线晶体学分析了前催化剂[RuCl(2)Cp *(PPh3)]。