SU212261A1 - METHOD OF OBTAINING SILALACTAMS - Google Patents

Description

This invention relates to a process for the preparation of sila lactams containing a nitrogen atom bonded to nitrogen by the general formula;

/

Bi

,

(CH

2 / n

where R and R are alkyl, aryl,, - alkyl, aryl, n 0.

The resulting compounds can be used to prepare amide-terminated polymers.

According to the proposed method, the chlorides of silyl-substituted carboxylic acids are reacted with ammonia or primary amines, preferably in an organic solvent medium, for example ether.

Example 1. In a three-liter flask with a capacity of 1 l, equipped with a reflux condenser, a mixer with a stirrer, and a bubbler, 39.5 g (0.2 mol) of 4 dimethylchloro-silyl acid acid chloride were added and diluted with 400 ml of abs. ether and through this ethereal solution is passed for 3 hours ammonia. The precipitate is then filtered off.

NHXl. Ether is distilled off from the mother ether solution, and the residue is distilled in vacuum. Obtain 18.3 g (64,1o / o) 51-dimethyl-4-silavalerolactam in the form of a thick light yellow oil

{CH3) 581-CH2-CH, - CH ,,

-N I H

"20

1.4705;

T. Kip. 163-165 ° C / 2.5 mmHg Art. By

d 1.0249.

Example 2. Under the conditions of example 1 to 39.3 g (0.2 mol) of 4-dimethylchloroplplating acid chloride, diluted with 400 ml of abs. ether, added 24.6 g (0.4 mol) of n-propylamine. The precipitated hydrochloric acid precipitate of n-propylamine is filtered off, ether is distilled off from the uterine ether solution, and the residue is distilled in vacuum. Obtain 28 g (77o / o) of 81-dimethyl-4-strength-N-propylvalerolactam in the form of a thick light yellow oil.

25

T. Kip. 78-79 ° C / 1.5 mm Hg. Art., According to 1.4687; df 0.9491; MRo found. 54.35; Calc 54.50.

Example 3. Under the conditions of examples 1 and 2 through a mixture consisting of 18.3 g (0.09 mol) of 3-dimethylchloro-silylisobutyric acid chloride, 19 g (0.18 mol) of triethylamine and 200 ml of abs. benzene in flow 2 hours miss dry ammonia. The precipitated hydrochloric acid salt of triethylamine is filtered off, the benzene is distilled off, and the residue is fractionated in vacuo. 7.7 g (58.5 o / o) 51-dimethyl-3syl-1-methylbutyrolactam are obtained in the form of a thick light yellow oil.

(CH3) 231-CH.g-CH - CH3

g - and

T. Kip. 172-176 ° C / 2.5 mmHg v .; 1.4625 each;

df 0.9826.

Subject invention

Claims (2)

1. A method for producing silactactams, characterized in that the chlorides of silyl-substituted carboxylic acids are reacted with ammonia or primary amines. 2. A method according to claim 1, characterized in that the process is conducted in an environment of an organic solvent, for example ether.