Notiz zur Darstellung von Trimethylsilanol

Birkofer, Leonhard; Ritter, A.; Dickopp, Heinz

doi:10.1002/cber.19630960543

Cited by 58 publications

(11 citation statements)

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“…Finally, the trimethylsilanol, 5A1, was prepared according to Birkofer et al [9] by hydrolysis of trimethylsilyl-acetamide. The physical data and yields of the silanols prepared are summarized in Table 1.…”

Section: +mentioning

confidence: 99%

Note on the Preparation of Alkyl‐ and Oxaälkyl‐dimethylsilanols

Boksányi

Liardon

Kováts

1976

Helvetica Chimica Acta

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Summary. The preparation of a series of alkyl-and (mono-, di-and poly-) oxaalkyl-dimethylsilanols is described. The stability of these compounds on storage is considerably increased by previous filtration through a silica gel column.For a study of the reaction of silanols with surface hydroxyl groups of (hydrated) amorphous silicon dioxide, we prepared a series of R-dimethyl-silanols with the following R-substituents:P8 m = 3 P G n = 4 P g m = 4 P 7 n = 5 Of these, trimethylsilanol [l], ethyl-dimethylsilanol [Z] and propyl-dimethylsilanol [3] have been described (see also [4] [S]).The substituents R, to be introduced, were either 1-Bromo-(1A and 1P) or the corresponding 1-vinyl-compounds (2A and 2P). From these, alkyl-dimethyl-chlorosilanes 3A3-3A18 could then be prepared in good yield by reaction of the Grignard derivative of the alkyl-bromides lA3-lAls with dimethyl-dichloro-silane according to reaction (1) [4] [5]:This reaction was not efficacicus for introduction of oxaalkyl substituents. In our attempts to prepare 3 P g in tetrahydrofuran (THF) by reaction (l), a complex mixture resulted, probably because the chlorosilane attacked the solvent, as it is known that dimethyl-dichloro-silane can attack the ether-C-0 bond [6]. In replacing dichlorosilane by dimethyl-diethoxy-silane, the ethoxysilane 4Pg could be isolated from the reaction mixture in good yield.

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