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2,4-Disila-1,3,5-oxadiazin, Cyclodisilazan-Carbonsäure-silylamid und -silylester by Nina Armbruster; Bettina Jaschke; Uwe Kingebiel; Claudia Voit; Fabio dall' Antonia; Regine Herbst-Irmer is a Chemistry article available to read on EtoBox.

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## Abstract The lithium salts of the Me~3~Si‐ as well as Me~3~Si‐ and Me~2~SiF‐substituted Cyclotrisilazanes I and II react with __tert__‐butylacylchloride under ring contraction and formation of the cyclodisilazane‐silylester, Me~3~SiN(SiMe~2~–N)~2~SiMe~2~–O–CO–CMe~3~ (1). The lithium salt of the fluorodi‐methylsilyl‐substituted cyclotrisilazan III forms with benzoylchloride primarily in the analogous reaction the carboxy‐silyl‐amide, Me~2~SiF(N–SiMe~2~)~2~SiMe~2~–NH–CO–C~6~H~5~^+^ (2), which can be converted with III and benzoylchloride into the cyclodisilazane‐silylester, Me~2~SiF(NSiMe~2~)~2~SiMe~2~–O–CO–C~6~H~5~, (3). A silylester substituted six‐membered disila‐oxadiazine (4) is the result of the reaction of the lithiated cyclotrisilazane, (Me~2~SiNH)~2~, (Me~2~SiNLi) with __tert__‐butyl‐acylchloride. The reaction includes anionic ring contraction and can be rationilized by a process analogous to keto‐enol‐tautomerism. Dilithiated octamethyl‐cyclotetrasilazane, (Me~2~SiNHMe~2~SiNLi)~2~, reacts with __tert__‐butyl‐acylchloride or benzoylchloride in a molar ratio 1:2 to yield symmetrically acylestersubstituted cyclodisilazanes, (RCO–O–SiMe~2~–NSiMe~2~)~2~, R = C~6~H~5~ (5), CMe

Who reads 2,4-Disila-1,3,5-oxadiazin, Cyclodisilazan-Carbonsäure-silylamid und -silylester?

Author

Nina Armbruster; Bettina Jaschke; Uwe Kingebiel; Claudia Voit; Fabio dall' Antonia; Regine Herbst-Irmer

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley - V C H Verlag GmbbH & Co.; Wiley (ISSN 0372-7874)

Published

2008

Language

DE

Field

Chemistry (Physical Sciences)