Styrene → 1-Heptene

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The catalysts of the invention are effective and practical chiral catalysts for enantioselective metathesis. Examples of AROM/CM reactions catalyzed by chiral catalysts of the invention are shown in Table 1. As shown in Example 1, treatment of 19 with 5 equivalents of styrene in the presence of 10 mol % catalyst 9 in THF (50° C.) leads to the formation of 20a in 80% ee and 71% isolated yield (>98% trans). Ru-catalyzed AROM/CM is highly selective with aliphatic olefins. With aliphatic olefins such as 1-heptene and sterically bulky vinylcyclohexane (entries 2-3), 20b-c are obtained in >98% ee, >98% trans and 57-60% yield.

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