Nonproductive events in ring-closing metathesis using ruthenium catalysts.
Nonproductive events in ring-closing metathesis using ruthenium catalysts.
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DOI:
10.1021/ja1029045
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发表时间:
2010-06-30
影响因子:
15
通讯作者:
Grubbs, Robert H.
中科院分区:
文献类型:
--
作者:
Stewart, Ian C.;Keitz, Benjamin K.;Kuhn, Kevin M.;Thomas, Renee M.;Grubbs, Robert H.
The relative TONs of productive and nonproductive metathesis reactions of diethyl diallylmalonate are compared for eight different ruthenium-based catalysts. Nonproductive cross metathesis is proposed to involve a chain-carrying ruthenium methylidene. A second more-challenging substrate (dimethyl allylmethylallylmalonate) that forms a trisubstituted olefin product is used to further delineate the effect of catalyst structure on the relative efficiencies of these processes. A steric model is proposed to explain the observed trends.
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