The addition of vinyl ethers to Z-selective, cyclometalated ruthenium metathesis catalysts generates Fischer carbene complexes. Although Fischer carbenes are usually thought to be metathesis inactive, we show that Fischer carbenes are metathesis active under certain circumstances. These species were found to decompose facilely to Ru hydride complexes, as identified by both experiment and computation. Since vinyl ethers are often used to quench metathesis reactions implementing Ru-based metathesis catalysts, their decomposition to hydrides can have a deleterious effect on the desired stereochemistry of the olefin product.

中文翻译：

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环金属化Z-选择性钌复分解催化剂的费歇尔碳烯的复分解反应

将乙烯基醚添加到Z选择性，环金属化的钌复分解催化剂中会生成Fischer卡宾络合物。尽管通常认为菲舍尔卡宾是无复分解活性的，但我们证明菲舍尔卡宾在某些情况下是复分解活性的。实验和计算均发现，这些物质易于分解为氢化钌配合物。由于乙烯基醚通常用于淬灭实施钌基复分解催化剂的复分解反应，因此它们分解为氢化物会对烯烃产物的所需立体化学产生有害影响。