Diversity-generation from an allenoate–enone coupling: syntheses of azepines and pyrimidones from common precursors
作者:Catherine A. Evans、Bryan J. Cowen、Scott J. Miller
DOI:10.1016/j.tet.2005.03.106
日期:2005.6
reactions of allenoate esters and α,β-unsaturated carbonyls lead to a diverse range of α,α′-disubstituted allenoates. With appropriately substituted monomers, intermolecular reactions can lead to pyrimidone products. Alternatively, with amine substituted allenoates, a 7-endo-dig cyclization can be carried out such that a divergent pathway is observed that leads to azepine scaffolds.
脲基酸酯和α,β-不饱和羰基的胺催化的偶联反应导致α,α′-二取代的脲基酸酯的不同范围。使用适当取代的单体,分子间反应可导致嘧啶酮产物。可选地,用胺取代的烯丙酸酯,可以进行7-内切-挖掘环化,从而观察到导致zezepine支架的发散途径。