Utility of 2‐Diphenylphosphoryloxy‐1,3‐Dienes in Multicomponent Hetero‐Diels–Alder Reactions to Construct Functionalized Six‐Membered Nitrogen Heterocycles
作者:Qiuyu He、Lirong Cao、Yiran Wei、Gregory R. Dake
DOI:10.1002/chem.202201328
日期:2022.7.26
The utility of 2-diphenylphosphoryloxy-1,3-dienes for the construction of substituted six-membered nitrogen heterocycles is presented. These dienes undergo boron trifluoride-promoted aza-Diels-Alder reactions when reacted with imines or related species formed in situ using aldehydes and amine derivatives. The stability of the dienes allows this three-component reaction to be carried out with no special
介绍了 2-二苯基磷酰氧基-1,3-二烯在构建取代的六元氮杂环中的应用。当这些二烯与使用醛和胺衍生物原位形成的亚胺或相关物质反应时,会发生三氟化硼促进的氮杂-狄尔斯-阿尔德反应。二烯的稳定性使得这种三组分反应可以在没有特别预防措施以消除水或空气的情况下进行。给出了这个过程的 31 个例子。在环加成步骤之后的进一步反应中突出了烯醇磷酸酯官能团的有用性,以产生官能化的哌啶或吡啶。