Multicomponent Synthesis of Substituted and Fused-Ring Imidazoles via Phospha-münchnone Cycloaddition
作者:Sara Aly、Mikhail Romashko、Bruce A. Arndtsen
DOI:10.1021/jo5028936
日期:2015.3.6
A new, one-pot synthesis of imidazoles from imines, acid chlorides, and N-nosyl imines or tethered nitriles is reported. The reaction is mediated by the phosphonite PPh(catechyl) and proceeds via regioselective cycloaddition with an in situ-generated phospha-münchnone 1,3-dipole. This provides an efficient route to construct both highly substituted and polycyclic imidazoles directly from available
据报道,由亚胺,酰氯和N- nosyl亚胺或拴合的腈新合成一锅的咪唑。该反应由亚膦酸酯PPh(邻苯二甲酰基)介导,并通过区域选择性环加成反应与原位生成的膦-慕尼黑酮1,3-偶极进行。这提供了直接从可用的底物上构建高度取代的多环咪唑和多环咪唑的有效途径,而无需金属催化剂,并且能够获得产品的多样性。