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- W2023725023 abstract "Insertion, Isomerization, and Cycloaddition Reactions of Lithiated Aminofluorosilanes* The lithium derivative 2 of (di‐ tert ‐butylfluorosilyl)(fluorodi‐isopropylsilyl)amine ( 1 ) reacts with benzoyl chloride to form the imines 3I and 3II in an insertion reaction. LiF elimination from 2 leads to the cyclodisilazane [(CMe 3 ) 2 SiFN—Si(CHMe 2 ) 2 ] 2 ( 4 ). The fluorine atom of the SiF(CHMe 2 ) group in 1 can be substituted by means of LiOSiMe 3 to yield 5 . The lithium derivative of 5 ( 6 ) is a dimer with very short Li—F distances. The lithium derivative 6 reacts with benzaldehyde in a [2 + 2] cycloaddition to give an (SiNCO) four‐membered ring compound ( 7 ), which thermally decomposes to yield the imine 8 and a cyclosiloxane, A fluorine/chlorine exchange is observed when Me 3 SiCl is added to the lithium derivative 6 . The resulting unstable lithium derivative of an aminochlorosilane eliminates LiCl to form the cylcodisilazane 9 . According to a crystal structure determination the formation of 9 involves isomerization of the intermediate iminosilane followed by dimerization." @default.
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- W2023725023 date "1992-04-01" @default.
- W2023725023 modified "2023-10-18" @default.
- W2023725023 title "Insertions‐, Isomerisierungs‐ und Cycloadditions‐Reaktionen lithiierter Aminofluorsilane" @default.
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- W2023725023 doi "https://doi.org/10.1002/cber.19921250405" @default.
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