重組

烯烴甲氧基化是一種有機反應,其特點是通過烯烴片段的重新分配來重新排列碳碳雙鍵。它使科學家發現了有機合成中的新斷層,為聚合物化學、藥物發現和天然產品合成的新進展鋪路。元合成反應有三大類:閉環元合成和交叉元合成經常被用於小分子有機合成,而開環元合成則經常被用於聚合。
特色類別
烯烴合成在有機合成中最常見也是最易辨識的應用是閉環合成 (RCM),這是一種無環二烯形成環的分子內反應。1
交叉偏聚使兩個烯烴在分子間反應中結合,得到帶有來自每個起始烯烴的取代基的烯烴產品。除了對殘留濕氣和氧氣的耐受性之外,優異的官能基相容性也促進了釕催化大環化作為製備大環 (≥12個原子) 的一般方法的廣泛接受。2
開环偏聚(ROMP)設計出具有可調特性的聚合物,並成為促進合成領域中一項強大的技術進步。由於成本低且起始原料容易獲得,這種強大的聚合方法可用於大規模生產聚合物。

Figure 1.Ring-closing metathesis (RCM)

Figure 2.Cross Metathesis (CM)

Figure 3.Ring-opening metathesis (ROM(P))
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