Copper-catalyzed oxidative aromatization of 2-cyclohexen-1-ones to phenols in the presence of catalytic hydrogen bromide under molecular oxygen
作者:Kotaro Kikushima、Yuta Nishina
DOI:10.1039/c3ra43071e
日期:——
Catalytic oxidative aromatization has been achieved using 2-cyclohexen-1-ones to obtain phenol derivatives in the presence of a catalytic amount of copper salt and aqueous HBr under molecular oxygen. The amount of HBr was successfully reduced to a catalytic quantity, and the other additive such as a ligand and an oxidant as well as inert conditions were unnecessary. Various mono-, di-, and trisubstituted
Preparation and reactions of 2-zincated 2-cyclohexen-1-one and related heterocycles
作者:A.S Bhanu Prasad、Paul Knochel
DOI:10.1016/s0040-4020(97)10116-8
日期:1997.12
of a copper(I) catalyst or palladium(0) catalyst with an allylic bromide or alkenyl and aryliodides in satisfactory to good yields. Several of these products can further be cyclized leading diastereoselectively to a polyfunctional decaline 12 or a pyrrole derivative 13. A 6-zincated uracil reagent has also been prepared and reacted with aryliodides in the presence of a palladiumcatalyst leading to
Practical and Efficient Suzuki−Miyaura Cross-Coupling of 2-Iodocycloenones with Arylboronic Acids Catalyzed by Recyclable Pd(0)/C
作者:François-Xavier Felpin
DOI:10.1021/jo051501b
日期:2005.10.1
The first Suzuki-Miyaura cross-coupling of 2-iodocycloenones with arylboronic acids catalyzed by 10% Pd(O)/C is described as an interesting alternative to classical homogeneous conditions. Most of the substrate reacted under mild condition at 25 degrees C under air in aqueous DME. The conditions described tolerate a wide range of iodoenones and boronic acids. Notably, the procedure features inexpensive reagents and solvents with low toxicity rendering the method environmentally benign. Additionally 10% Pd(O)/C could be recovered and efficiently reused at least five times without significant alteration of the yields of the cross-coupled product.