C(2)-Functionalization of 1-substituted imidazoles with cyanoacetylenes and aromatic or heteroaromatic aldehydes
作者:Boris A. Trofimov、Ludmila V. Andriyankova、Kseniya V. Belyaeva、Anastasiya G. Mal’kina、Lina P. Nikitina、Oleg A. Dyachenko、Olga N. Kazheva、Grigorii G. Alexandrov、Gennadii V. Shilov、Andrei V. Afonin、Igor’ A. Ushakov
DOI:10.1016/j.tet.2010.11.072
日期:2011.2
a hitherto unknown family of functionalized imidazole derivatives, in up to 62% yield. This three-component manifold represents a novel C(2)-functionalization of the imidazole nucleus involving zwitterionic, carbene and enol ether intermediates. Unlike the analogous reaction with aliphatic aldehydes, which gives enol ethers, in this case the latter undergo the further rearrangement to 3-(2-imidazol