The palladium catalyzed tandem cyclization/coupling reaction of conjugated enynes having a stabilizing carbon nucleophile with unsaturated halides or triflate afforded stereodefined functionalized 1,3-bis-exocyclic dienes. Moderate yields were obtained with substrates of type 1. However, higher homologs of type 2 led to the formation of functionalized 1,3-bis-exocyclic dienes and hexatrienes in good yields. An initial study on the sequential cyclization/coupling reaction/electrocyclization in a one-pot procedure leading to cyclohexadienes is also presented.
钯催化的串联环化/偶联反应中,具有稳定碳亲核试剂的共轭炔与不饱和卤代物或三
氟磺酸盐反应,得到了立体定义的功能化1,3-双外环二烯。以类型1的底物获得了中等产率。然而,类型2的更高同系物则以良好的产率形成了功能化的1,3-双外环二烯和六
三烯。还介绍了通过一步法连续进行环化/偶联反应/电环化反应,生成环
己二烯的初步研究。