Alkylpalladium N-Heterocyclic Carbene Complexes: Synthesis, Reactivity, and Catalytic Properties

被引:31
|
作者
Esposito, Oriana [2 ]
Gois, Pedro M. P. [1 ,2 ,3 ]
Lewis, Alexandra K. de K. [1 ]
Caddick, Stephen [1 ]
Cloke, F. Geoffrey N. [2 ]
Hitchcock, Peter B. [2 ]
机构
[1] UCL, Dept Chem, London WC1H OAJ, England
[2] Univ Sussex, Sch Life Sci, Dept Chem & Biochem, Brighton BN1 9QJ, E Sussex, England
[3] Inst Super Tecn, CQFM, Dept Engn Quim & Biol, P-1049001 Lisbon, Portugal
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1021/om800455h
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The dimers [trans-[(neopentyl)Pd(mu-Cl)(I(t)lBu)](2), 2, and (cis-[(neopentyl)Pd(mu-Cl)(IPr)](2), 3 ((IBu)-Bu-t = 1,3-bis-tert-butylimidazol-2-ylidene, IPr = 1,3-bis-2,6-diidopropylimidazol-2-ylidene), have been synthesized from [Pd(neopentyl)(Cl)(1,5-COD)], and their reactivity toward a variety of nucleophiles has been evaluated. In particular, this study revealed that 2 can be readily cleaved by primary and secondary amines, affording stable transamination products, which are surprisingly resistant to deprotonation. Dimer 3 was subsequently used as a catalyst in a series of Buchwald-Hartwig amination reactions of aryl chlorides.
引用
收藏
页码:6411 / 6418
页数:8
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