- Metal-free, stereospecific bis-silylation of functionalized alkynes with NHC-supported silylaminosilylene
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The NHC-supported silylaminosilylene Ar(SiMe3)N(Cl)Si(IiPr) (1; Ar = 2,6-iPr2C6H3, IiPr = 1,3-diisopropyl-4,5- dimethylimidazol-2-ylidene) is an efficient and stereospecific bis-silylation reagent for a range of functionalized alkynes to yield cis-1,2-bis-silylated alkenes via a 1,4-silyl migration from the amino nitrogen atom to an alkyne carbon atom. The reaction is regio- and stereospecific for terminal alkynes with an electron-withdrawing substituent, thus providing a facile access to 1,2-bis-silylated alkenes with two different silyl groups.
- Cui, Haiyan,Ma, Bing,Cui, Chunming
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p. 7339 - 7342
(2013/01/15)
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