Addition of pyrroles onto terminal alkynes catalyzed by a dinuclear ruthenium (II) complex
作者:Sze Tat Tan、Yew Chin Teo、Wai Yip Fan
DOI:10.1016/j.jorganchem.2012.02.017
日期:2012.6
alkynes has been catalyzed by a dinuclear ruthenium complex, Ru2(CO)4(PPh3)2Br4, resulting in the formation of geminal 2-vinylpyrroles in high yields under mild conditions. Further functionalization with pyrroles or alkynes to afford dipyrrolmethanes or 2,5-bis(vinyl)pyrroles via the vinyl functional group can readily be achieved. A mechanism involving cationic ruthenium complexes was proposed based
双核钌络合物Ru2(CO)4(PPh3)2Br4催化将吡咯加成到炔烃上,导致在温和条件下以高收率形成双核2-乙烯基吡咯。可以容易地实现用吡咯或炔烃的进一步官能化,以经由乙烯基官能团提供二吡咯甲烷或2,5-双(乙烯基)吡咯。基于产物的区域选择性,氘化和在催化过程中进行的红外光谱研究,提出了一种涉及阳离子钌络合物的机理。