Synthesis of an epoxyquinol analog: efficient methodology for the insertion of side chains into cyclohexenone cores
摘要:
A novel epoxyquinol analog was prepared by molecular simplification of monomeric and dimeric scaffolds. A feasible methodology for the insertion of side chains into cyclohexenone skeleton was developed. Insertion of the hydroxymethyl side chain was achieved through alpha-sulfonylcarbanion chemistry. The alkenyl chain was inserted through palladium cross-coupling strategy. (C) 2010 Elsevier Ltd. All rights reserved.
Palladium-catalyzed cross-coupling reactions of arylmetal compounds with β-substituted α-iodoenones and a cyclohexyl triflate
作者:Folkert Boße、Ashok Rao Tunoori、AndréJ. Niestroj、Oliver Gronwald、Martin E. Maier
DOI:10.1016/0040-4020(96)00489-9
日期:1996.7
Electron-rich arylstannanes were found to couple with α-iodoenones in the presence of Pd2(dba)3·CHCl3, a weak-coordinating ligand [AsPh3 or Pd(o-tol)3] and CuI (0.75-1.0 equiv) to give sterically hindered α-arylcyclohexenones 15–20. In addition, compounds 19, 22 and 23 were prepared by Suzuki coupling reactions of the cyclohexyl derivatives 7c,f and 11, respectively, with the arylboronic acid 21.
Cross-coupling approach towards dynemicin analogs without the nitrogen
作者:Folkert Boße、Ashok Rao Tunoori、Martin E. Maier
DOI:10.1016/s0040-4020(97)00616-9
日期:1997.7
Utilizing a cross-coupling reaction between the arylstannane 5 and the iodoenone 7, the arylcyclohexenone 8 was prepared. This compound was then transformed into the enediyne aldehydes 16a,b. Treatment of 16a with cat. amounts of TBAF gave rise to the macrocyclic dynemicin analog 17a. This was converted to the phenolic enediyne 18. (C) 1997 Elsevier Science Ltd.