catalyst give access to indoles, 1,4-dihydroquinolines, and 1,2-dihydroisoquinolines, respectively. This sequential protocol also allows the synthesis of dihydrobenzoazepines, although the ring-closing metathesis (RCM) step is complicated by the alkene isomerization processes. From certain substrates, the direct annulation is observed in the titanium-mediated step, which is likely to occur through an
衍生自邻-
乙烯基苯胺,邻-烯丙基
苯胺和邻-
乙烯基苄胺的N-酰基酰胺的二甲基
噻吩并茂甲基化反应提供了相应的酰胺,这些酰胺暴露于第二代Grubbs
钌催化剂后可生成
吲哚,1,4-二氢
喹啉和1, 2-二氢
异喹啉分别。尽管该闭环复分解(RCM)步骤因烯烃异构化过程而变得复杂,但该顺序方案还允许合成二氢苯并a庚因。从某些基材上,可以在
钛介导的步骤中观察到直接环化,这很可能是通过烯烃复分解-分子内烯化序列发生的。