Base-Promoted Aryl Carbon–Iodine and Carbon–Bromine Bond Cleavage with Rhodium Porphyrin Complexes: Scope and Mechanism
作者:Ying Ying Qian、Kin Shing Chan
DOI:10.1021/om300441p
日期:2012.8.13
and carbon–bromine bond (Ar–X, X = I, Br) cleavage by rhodiumporphyrincomplexes was achieved to give the rhodium(III) porphyrin aryls Rh(ttp)Ar (ttp = tetra-p-tolylporphyrinato dianion). Mechanistic studies showed that RhII2(ttp)2 is the intermediate for Ar–X (X = I, Br) cleavage. The Ar–X cleavage process goes through a rhodium(II) porphyrin radical mediated ipso-substitution mechanism.
通过铑卟啉配合物裂解碱促进的芳基碳碘键和碳溴键(Ar–X,X = I,Br),得到铑(III)卟啉芳基Rh(ttp)Ar(ttp = tetra- p -tolylporphyrinato二价阴离子)。机理研究表明,Rh II 2(ttp)2是Ar–X(X = I,Br)裂解的中间体。Ar–X裂解过程通过铑(II)卟啉自由基介导的ipso取代机制。