Synthesis of Pyrroles by Consecutive Multicomponent Reaction/[4 + 1] Cycloaddition of α-Iminonitriles with Isocyanides
作者:Patrice Fontaine、Géraldine Masson、Jieping Zhu
DOI:10.1021/ol9001619
日期:2009.4.2
[4 + 1] Cycloaddition of α,β-unsaturated imidoyl cyanide (2-cyano-1-azadienes) with isocyanides in the presence of a catalytic amount of AlCl3 afforded polysubstituted 2-amino-5-cyanopyrroles in good to excellent yields. In combination with the IBX/TBAB-mediated oxidative Strecker reaction, this important heterocycle is readily synthesized in two steps from simple starting materials.
[4 + 1]在催化量的AlCl 3的存在下,将α,β-不饱和亚氨基氰基氰化物(2-cyano-1-azadienes)与异氰酸酯进行环加成反应,可以以良好的收率很好地得到多取代的2-氨基-5-氰基吡咯。结合IBX / TBAB介导的氧化Strecker反应,可以很容易地从简单的起始原料分两步合成这种重要的杂环。