Two reagent-controlled regiodivergent annulation protocols for Achmatowicz products with vinylogous nucleophiles have been developed, which furnished a series of bicyclic cyclopenta[b]pyrans and 8-oxabicyclo[3.2.1]octane derivatives in 28–90% yields. Plausible mechanisms were proposed to involve either Pd-catalyzed Tsuji–Trost allyl–allyl coupling and concomitant Michael cyclization or quinine-promoted
已经开发了两种试剂控制的 Achmatowicz 产物与插烯亲核试剂的区域分歧环化方案,提供了一系列双环环戊[ b ]
吡喃和 8-氧杂双环 [3.2.1]
辛烷衍
生物,产率为 28-90%。提出了可能的机制涉及 Pd 催化的 Tsuji-Trost 烯丙基-烯丙基偶联和伴随的迈克尔环化或
奎宁促进的级联逐步 [5 + 2] 环加成和分子内迈克尔环化。