The first asymmetric total synthesis of the hexacyclic veatchine-type C₂₀-diterpenoid alkaloid (−)-garryine is presented. Key steps include a Pd-catalyzed enantioselective Heck reaction, a radical cyclization, and a photoinduced C–H activation/oxazolidine formation sequence. Of note, a highly enantioselective Heck reaction developed in this work provides efficient access to 6/6/6 tricyclic compounds, in particular, containing a C19-functionalitiy, which is useful for diverse transformations.

中文翻译：

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通过对映选择性 Heck 反应催化不对称全合成 (−)-Garryine

首次提出六环veatchine型C _{20 -二萜生物碱(-)-garryine的不对称全合成。}关键步骤包括 Pd 催化的对映选择性 Heck 反应、自由基环化和光诱导的 C–H 活化/恶唑烷形成序列。值得注意的是，这项工作中开发的高度对映选择性 Heck 反应可以有效地获得 6/6/6 三环化合物，特别是含有 C19 官能团的化合物，这对于多种转化非常有用。