SU362840A1 - METHOD OF OBTAINING - Google Patents

Description

one

This invention relates to the preparation of nitrogen atomized heterocyclic compounds of the general formula

where 2, 3

R, R, H, alkyl,

which are of interest, on the one hand, as structures, on the basis of which it is convenient to study the mutual influence of atoms and molecules, and on the other hand, as reactive intermediates in organic synthesis. For example, the synthesis of linear polyethylenimines to be carried out on the basis of N-silylated ethylenimines, the same, apparently, can be said about the preparation of linear polypropyleneimines.

It is dangerous for heterocycles (CH2) nNH with the introduction of the trimethylsilyl group by heating the heterocyclic amine with hexamethyldisilazane in the absence of catalysis.

However, for amines with n 2, 3, this reaction was not applied.

Trimethyl- (L-aziridinyl) silane is still obtained by the interaction of aziridine with trimethylchlorosilane. To simplify the process and increase the yield of the target product, it is proposed to obtain trimethyl - (; Y-aziridinyl) or (IV-azetidinyl) silanes by the interaction of heterocyclic amines (CH2) nNH, where n 2, 3 with hexamethyldisilazane when heated, preferably 50-100 ° C, followed by separation of the target product by known methods.

The process is better carried out at a molar ratio of the heterocyclic amine to hexamethyldisilazane 3: 1-5: 1.

Example 1. 16.1 g (0.1 mol) of hexamethyldisilazane and 21.5 g (0.5 mol) of ethylene.min

heated at t. Kip. within 20 hours The mixture is then fractionated. The fraction with a boiling point of 96-97 ° C / 760 mm Hg. Art. is trimethyl - (L-ethyleneimino) silane. The yield is 78%, p 1.4110; of 0.7942

Mv 115.

Elementary composition,%: found C-52,10; H-11.46; Si-24.30; N-12.20; calculated C-52,17; H-11.39; Si-24.35; N-12.17.

Example 2. 16.1 g (0.10 l; ol) of hexamethyldisilazane and 28.5 g (0.5 mol) of azetidine are heated at m.p. within 30 hours The mixture is then fractionated. The fraction with a boiling point of 102-103 0/760 m and RT. Art. is trimethyl- (IV-azetidino) silane. Yield 50%, 4199; df 0.8074; M.V. 129.

Elementary composition in%: found С- 56,12; H-11.40; N-10.72; Si-21.61; calculated C-56.01; H-11.50; N-10.79; Si-21.70.

Subject invention

Claims (3)

1. A process for the preparation of trimethyl- (N-azipridinyl) - or - (N-azetidinyl) silanes, characterized in that, in order to simplify the process and increasing the yield of the target product, heterocyclic amines (CH2) nNH, where n 2, 3, are reacted with hexamethyldisilazane when heated, followed by isolation of the target product by known methods. 2. A method according to claim 1, characterized in that the process is carried out at 50-100 ° C. 3. Method according to paragraphs. 1 and 2, characterized in that the process is carried out at a molar ratio of heterocyclic amine to hexamethyldi-Silazane of 3: 1-5; one.