Experimental And Computational Studies On Rh(I)-Catalyzed Reaction Of Siloxyvinylcyclopropanes And Diazoesters
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY(2020)
摘要
The Rh(I)-catalyzed reaction of siloxyvinylcyclo-propanes and diazoesters leads to the formation of siloxyvinylcyclobutane and 1,4-diene derivatives. With [Rh(cod)CI](2) as the catalyst, the formation of 1,4-diene was favored over the formation of siloxyvinylcyclobutane. By changing the catalyst to [Rh-(cod)(2)OTf], siloxyvinylcyclobutane derivatives are formed with excellent chemoselectivities and in moderate to good yields. The alkene products are also obtained as single E configured isomers. A detailed mechanism for this transformation is proposed on the basis of mechanistic experiments and DFT calculations. The effect of catalysts on the chemoselectivity of these reactions is also examined computationally.
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关键词
siloxyvinylcyclopropanes
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