Ruthenium(II) Acetate Catalyst for Direct Functionalisation of sp2-CH Bonds with Aryl Chlorides and Access to Tris- Heterocyclic Molecules
作者:Franc Požgan、Pierre H. Dixneuf
DOI:10.1002/adsc.200900350
日期:——
generated (p-cymene)ruthenium diacetate [Ru(OAc)2(p-cymene)] catalyst 2, prepared from the (p-cymene)ruthenium dichloride dimer [RuCl2(p-cymene)]2, 1} and potassium acetate (KOAc), acts as an excellent catalyst for ortho CH bond functionalisation of 2-pyridylbenzene with unactivated aryl chlorides in the presence of potassium carbonate (K2CO3). Quantitative diarylation can be reached in 1 h at 120 °C. The
该原位生成的(p -cymene)二乙酸钌的[Ru(OAc)2(p -cymene)]催化剂2,从(制备p -cymene)二氯化钌二聚体将[RuCl 2(p -cymene)] 2,1 }和乙酸钾(乙酸钾),充当极好的催化剂邻2- pyridylbenzene在碳酸钾的存在下未活化的芳基氯化物的CH键官能(K 2 CO 3)。在120°C下1 h即可达到定量二芳基化。在更剧烈的条件下,在KOAc或K 2 CO 3存在下,用1对2-吡啶基苯与2-卤代吡啶以及2-和3-卤代噻吩进行二芳基化反应,以生成潜在的三齿配体tris [1,2,3- (2-吡啶基)]苯和双(2,6-硫代苯基)2-吡啶基苯。