a new type of functionalized furanoxonium ion precursor, permitting rapid and flexible construction of diverse cyclopenta[b]pyrrolidinone derivatives. The unprecedented and highly efficient bicyclic γ-lactam product formation is originated from an unusual retro-aza-Piancatelli rearrangement of the major cis-fused multifunctionalized cyclopentenone to the minor trans-fused one followed by a lactamization
利用
呋喃基
丙烯酸甲酯作为一种新型的功能化
呋喃氧离子前体,开发了一种新型的 aza-Piancatelli 重排引发的级联反应,可以快速灵活地构建多种
环戊二烯[ b ]
吡咯烷酮衍
生物。前所未有且高效的双环 γ-内酰胺产物的形成源于主要的顺式稠合多官能化
环戊烯酮发生不寻常的逆-aza-Piancatelli 重排到次要的反式稠合的
环戊烯酮,然后发生内酰胺化反应。