The cedrene carbon skeleton was directly and efficiently assembled from a simple monocyclic precursor by the strategic use of a high yielding intramolecular Pauson–Khand cyclisation reaction. A small number of further synthetic manipulations provided a concise formal total synthesis of α- and β-cedrene. The cyclisation precursor was readily prepared, with a stereoselective ketone alkenylation selectively
通过策略性使用高产率的分子内Pauson-Khand环化反应,可以从简单的单环前体直接高效地组装
雪松烯碳骨架。少量进一步的合成操作提供了简明的形式的α-和β-
雪松烯正式合成。环化前体易于制备,具有立体选择性的酮烯基,可选择性地提供有效接近天然靶标所需的烯烃。