air-stable isochromenylium tetrafluoroborates and bifunctional styrenes containing a 1,3-diketone moiety has been developed, affording the corresponding single diastereomeric ocatahydrophenanthrene derivatives (21 examples, up to 86% yield). A cascade process of [4 + 2]-cyclization and subsequent intramolecular nucleophilic addition is proposed to generate the three new C–C bonds diastereoselectively in
已经开发了一种高效的无催化剂的空气稳定的四
氟硼酸异
铬鎓与含有1,3-二酮部分的双官能
苯乙烯的级联反应,从而提供了相应的单一非对映异构的ocatahydrophenanthrene
菲衍
生物(21个实例,产率高达86%)。提出了[4 + 2]-环化和随后的分子内亲核加成的级联过程,以在反应中非对映选择性地产生三个新的CC键。