Reductive Conjugate Addition of Haloalkanes to Enones To Form Silyl Enol Ethers
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A new method is presented for tandem reductive conjugate addition and silyl enol ether formation from cyclic and acyclic enones and enals in the presence of a Mn reductant, a Ni(terpyridine) catalyst, and a trialkylchlorosilane. The addition of secondary, tertiary, and hindered primary haloalkanes is demonstrated. Preliminary studies on the mechanism show that the intermediacy of L1(Ni)(η3-1-triethylsilyloxyalkenyl)X or in-situ-formed RMnX is unlikely.
创建时间:
2016-02-23



