Synthesis of 3-halo-2,5-disubstituted furans via CuX mediated cyclization–halogenation reactions
作者:Arife Yazici、Stephen G. Pyne
DOI:10.1016/j.tetlet.2011.01.120
日期:2011.3
The Cu(I) halide (X = I, Br, Cl) mediated reactions of Cbz-protected cis-2-phenylethenyl-3-hydroxypyrrolidine gave novel 3-halo-2,5-trisubstituted furans in good yields, via a cyclization-halogenation, ring-opening reaction sequence. In contrast, the reactions with CuCN gave mainly the corresponding 3-cyanofuro[3,2-b]pyrrole formed from a cyclization–cyanation reaction.
Cbz保护的顺式-2-苯基乙烯基-3-羟基吡咯烷的卤化铜(X = I,Br,Cl)介导的反应通过环化反应以高收率得到了新型3-卤代2,5-三取代呋喃卤化,开环反应顺序。相反,与CuCN的反应主要产生了由环化-氰化反应形成的相应的3-cyanofuro [3,2- b ]吡咯。