Alkylation of 1,3-dicarbonyl compounds with benzylic and propargylic alcohols using Ir–Sn bimetallic catalyst: synthesis of fully decorated furans and pyrroles
作者:Paresh Nath Chatterjee、Sujit Roy
DOI:10.1016/j.tet.2011.04.092
日期:2011.6
The heterobimetallic complex [Ir(COD)(SnCl3)Cl(μ-Cl)]2 catalyzes the direct substitution of hydroxyl groups in benzylic and propargylic alcohols by 1,3-dicarbonyl moiety. In 4-hydroxycoumarin, benzylation and propargylation occurs at the 3-position. Selective propargylation or allenylation takes place depending on the nature of propargylic alcohol. By applying the methodology, multi-substituted furans
杂双金属配合物[Ir(COD)(SnCl 3)Cl(μ-Cl)] 2催化苄醇和炔丙基醇中的羟基被1,3-二羰基部分直接取代。在4-羟基香豆素中,苄基化和炔丙基化发生在3-位。选择性炔丙基化或烯丙基化取决于炔丙醇的性质而发生。通过应用该方法,已经以高收率合成了多取代的呋喃和吡咯。