Aminosilanes halogenosilanes

Evidence for the foregoing postulate is provided by the observations that such reactions take place only in the presence of trace quantities of free amine and are inhibited by addition of halogenosilanes (which react with amine) furthermore, reactions of chloro-aminosilanes with CS2 are slow and ill-defined. Similar catalysis is found in some related reactions involving B-N or Si-N cleavage, but this is not the case with amides of class b metals such as Sn, where insertion proceeds even in the presence of MesSnCl,... 

The synthesis of aminosilanes from halogenosilanes and amines can usually be accomplished in an inert solvent like diethyl ether, benzene or carbon tetrachloride. Mostly, the reaction is carried out at room temperature and, if necessary, with cooling an alternative approach is to conduct the reaction in liquid ammonia. 

An alternative route to aminosilanes is the reaction of halogenosilanes with metallated amides and amines. Thus, one can synthesize, e.g. t-butyl-t-butylaminofluorophenylsil-ane (413) in 91% yield from phenyl-t-butyldifluorosilane (411) and lithio-t-butylamide (412) (equation 188)212. Analogously t-butyl-(l-methylprop-l-yl)-phenylamino-fluorosilane (416) can be obtained from lithiated aniline 415 with the respective fluorosil-ane 414 (equation 189)213. 

Without additional reagents and sulfuric acid Halogenosilanes from aminosilanes s. 4, 473 m.a.T. and HjSO SiNH2 SiHal... 

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