SU323006A1 - METHOD OF OBTAINING p-AMINOETHILSILANES WITH FUNCTIONAL AMINOGROUNDS AT ATOMACRUMINIA - Google Patents

Description

This invention relates to the field of organic chemistry, namely the chemistry of organosilicon compounds.

p-aminoethylsilanes with functional amino groups at the silicon atom of the general formula

/

OnRs-nSiCHaCHzN

g /

where f is -NV. R-alkyl, are substances that have not yet been described.

A known method for producing p-aminoethylsilanes by Probe by the reaction of adding amines to alkoxyvinylsilanes in the presence of sodium amide, which does not lead to the unambiguous formation of alkoxyaminoethylsilanes due to the simultaneous reaction of the substitution of alkoxy groups for the amino group.

The purpose of the invention is to develop a method for producing p-aminoethylsilanes with functional amino groups on a silicon atom.

The compounds according to the invention are prepared by the addition of aliphatic amines (primary and secondary) to vinyl silanes of the general formula

R //

alkyl, O —N; R

alkyls, n l-3.

The catalysts for the reaction are organic amides, which can be obtained by reacting the aminolysis of amines with lithium alkyls. Carrying out the reaction in polar solvents can shorten the reaction time and

increase yields of accession products. The addition reaction is carried out in the temperature range of 20-100 ° C, the ratio of reactants is vinyl silane: amine: butyl lithium 1: 1.2:: 0.15-1: 2: 0.3. Maximum yields of addition products (primary amines 20–40%, secondary amines 60–80% obtained with a reagent ratio of 1: 2: 0.3).

Due to the presence of functional amino groups, it is possible to obtain various derivatives of p-aminoethylsilanes, the difference in the reactivity of these functional groups at the silicon atom and in the hydrocarbon radical opens up the possibility of conducting selective reactions in one of

reactionary centers and undoubtedly have practical significance.

(0.0242 mol) lithium butyl concentration of 7.5 mol / ml in a stream of inert gas at -30 ° C. After boiling for half an hour to form the organic amide, the mixture is cooled again and 19.1 g (0.089 mol) of methyl vinyl bis (diethylamino) silane is added.

The reaction mixture was boiled for 30 hours, then filtered and cozy and fractionated.

During the distillation, 10.2 g (42%) of the fraction with m.p. 105-106 ° C / 2 mm; P 1,4557; df 0.8443; Si 9.42%; N 15.47%, 15.72%.

Example 2. Synthesis of diethyldiethylamino-p (propylamino) ethylsilane.

Under conditions similar to Example 1, from

5.3 g (0.865 mol) of propylamine and And g (0.0595 mol) of diethylbenyl diethylaminosilane in the presence of 10 ml (0.015 mol) of lithium butyl with a concentration of 15-10 mol / ml is obtained

5.4g (37%) fraction with m. Kip. 105 - 107 ° C / 4 mm; P 1.4516; df 0.8415; Si 11.66%; N 10.7%.

Example 3. Synthesis of dimethyldiethylamino-p (diethylamino) ethylsilane.

Under conditions similar to those described in example 1, from 10.7 g (0.147 mol) of diethylamine and 11.5 S (0.0735 mol) of dimethylvinyl diethylaminosilane in the presence of 29.4 ml (0.0205 mol) of lithium butyl in a concentration of 7.5- 10 mol / ml gives 12.9 g (77%) of the fraction with m.p.

rf ° 1,4454; df 0.8322:

118-120 ° C / 20 mm; Si 12.33%; N 12.13%.

Subject invention

A process for the preparation of p-aminoethylsilanes with functional amino groups at the silicon atom, characterized in that the aminovinylsilane is reacted with a primary or secondary amine in the presence of a product as a catalyst and interacts with butclity with the starting amine.