Construction of Dihydropyrido[2,3-<i>d</i>]pyrimidine Scaffolds via Aza-Claisen Rearrangement Catalyzed by <i>N</i>-Heterocyclic Carbenes
作者:Krzysztof Dzieszkowski、Izabela Barańska、Zbigniew Rafiński
DOI:10.1021/acs.joc.0c00657
日期:2020.5.15
N-Heterocyclic carbenes (NHCs) catalyzing aza-Claisen rearrangement of α,β-unsaturated enals with cyclic vinylogous amides under oxidative conditions generating potentially biologically active dihydropyridinone-fused uracils have been developed. This strategy represents a unique NHC-activation-based path with the use of 6-aminouracils as stable α,β-diEWG cyclic vinylogous amides for the efficient synthesis
已经开发了在氧化条件下用环乙烯基乙烯基酰胺催化α,β-不饱和烯醛的氮杂-碳烯化合物(NHC)催化a,β-不饱和烯醛的氮杂-克莱森重排的方法,该方法可合成具有潜在生物活性的二氢吡啶并酮融合的尿嘧啶。该策略代表了独特的基于NHC活化的途径,使用6-氨基尿嘧啶作为稳定的α,β-diEWG环状乙烯基酰胺,可有效合成双环N-未保护的内酰胺,类似于许多有用药物中的内酰胺。