Gold(I) Complexes in Ionic Liquids: An Efficient Catalytic System for the C-H Functionalization of Arenes and Heteroarenes under Mild Conditions
作者:Marco Baron、Andrea Biffis
DOI:10.1002/ejoc.201900529
日期:2019.6.16
Use of ionic liquids allows to boost the reactivity of gold(I) complexes as catalysts in the hydroarylation of alkynes with arenes and heteroarenes, enabling the use of <1 mol‐% catalyst under mild conditions (low temperature, no acid cocatalyst). The catalytic system also exhibits tunable selectivity and recyclability.
Chelatingdicarbenecomplexes of palladium(II) and platinum(II) catalyse at room temperature with 1% catalyst loading the reaction of ethyl phenylpropiolate with aromatic heterocycles to yield synthetically useful intermediates for fine chemicals without the need to use prefunctionalized substrates. The reaction outcome was found to be strongly dependent on the nature of the anionic ligands at the
Pt(II)-catalyzed hydroarylation reaction of alkynes with pyrroles and furans
作者:Juzo Oyamada、Tsugio Kitamura
DOI:10.1016/j.tet.2009.03.022
日期:2009.5
A Pt(II) catalyst showed a drastic effect on hydroarylation of alkynes with pyrroles and furans compared with Pd(OAc)(2) catalyst. The hydroarylation reactions proceeded smoothly under mild conditions to double-hydroarylation products in good yields. Mono-adducts Were formed only when the second hydroarylation was inhibited by steric hindrance Of Substrates or low reactivity of the mono-adducts. (C) 2009 Elsevier Ltd. All rights reserved.