Sequential ATRA/Reductive Cyclopropanation Reactions with a Ruthenium Catalyst in the Presence of Manganese
作者:Mariano A. Fernández-Zúmel、Charlotte Buron、Kay Severin
DOI:10.1002/ejoc.201100175
日期:2011.4
addition (ATRA) reactions of ethyl trichloroacetate, dichloromalononitrile, or diethyl 2,2-dichloromalonate with olefins followed by dechlorination have provided functionalized cyclopropanes in one step. The RuIII complex [Cp*RuCl2(PPh3)] was used as a catalyst precursor and commercial Mn powder as reducing agent. Reactions with the less activated substrate ethyl dichloroacetate gave ATRA products with
三氯乙酸乙酯、二氯丙二腈或 2,2-二氯丙二酸二乙酯与烯烃的原子转移自由基加成 (ATRA) 反应,然后脱氯,在一个步骤中提供了官能化的环丙烷。RuIII配合物[Cp*RuCl2(PPh3)]用作催化剂前体和商业Mn粉末作为还原剂。与活性较低的底物二氯乙酸乙酯反应得到具有高转换数的 ATRA 产物,但未观察到环丙烷化。