SU452560A1 - Method of preparing ethers of polyatomic alcohols - Google Patents

Description

The invention relates to a process for the preparation of new unsaturated esters of polyatomic alcohols, in particular pentenic esters with improved physicomechanical properties, light and chemical properties, which can be used in polymer chemistry. Known method for producing unsaturated ester :; : - iHoroaTOMHbix alcohol-allyl esters of pentaerythritol by reacting pentaerythritol with an allyl halide in dimethyl sulfoxide. in the presence of alkali at 5-11 ° C, followed by isolation of the target product by known methods. The proposed method of preparing polyenoic alcohols pentene esters implies that chloropentene is mutually interacting with the corresponding: polyhydric alcohol at 60-120 ° C in a polar solvent, for example dimethylsulfonic acid, in the presence of alkali, followed by isolation of the target product by known techniques. Example. In the reactor, equipped with a thermometer, reflux condenser, stirrer and addition funnel, load 39 weight.h. dimethylsulfide, 24 weight.h. caustic soda and 67 weight.h. trimtilolpropane. To a mixture heated to 115 ° C with an intvN (a vigorously operating stirrer is added for 1 hour 52 V6C of chloropentene, after which the mixture is kept for 4-6 hours at 9O-100 ° C, then cooled, the sodium chloride is filtered off and accelerate at 139-142 C / 1-2 mm of mercury., get81 w / h of eupentene ester of grimetyopropanone in the form of a clear liquid (1.4647. Yield: 81%. Found: C 64.8; H 10.5. Bromine the number is 8O, 5; the hydroxyl number is 17.1; the mole mole is 2O2. Calculated,%: C, 65.3; H, 10.9. The bromine number is 80, the hydroxyl number is 16.9, and the mole weight is 198. Example 2. In a reactor equipped with a reverse thermometer hshpilka, mixer and addition funnel, load

68 inc.h. penaertvrita, 54 weight.h. caustic soda, 60 W.h. dimethyl sulfoxide “5O wt.h, govol K heated to 90 ° С smsi with an intensively working mixer of 6 h g for 1 h 115 weight.h. chlo1. pentene; Then, the reaction mixture is kept for 4-6 hours at 70-80, cooled, after washing, the separated sodium chloride and rA Empiot. At 142-146 C / / 1-2 mm Hg, 72 parts by weight are obtained. diisopene shadow afnra in the form of a transparent liquid, 0.9660, ni 1.465О. Exit 53

Naydenv,%: C 67.3; H 11.5. Bromine number 113; and the number is 11.7.

Calc.,%: C, 66.3; H 10.3. The bromine number is 116, the hydraulic number is 12.5.

Example 3. In the reactor, equipped with a thermometer, reflux condenser, stirring A in a dropping funnel, load 39 weight.h. dimethyl sulfoxide, 24 weight.h. caustic potash to 92 weight.h. glyceri

To HarpeTtrfi up to 115 ° C, with a vigorously operating mixer, 52 veg.h are added during 1-1.5 hours. chloropentene, the mixture is kept for 4-6 hours at 9O-100 C,

then cooled, filtered, separating sodium chloride and dispersed.

At 148-152 C / 1-2 mm Hg. get 57 weight.h. isopentenoic ester gly2O J

cerin in the form of a clear liquid, "1.4665. Yield 72%.

Found,%: C 60.3; H 10.2. Bromine number 110; Hydraulic number is 21.0. Mol weight. 159.

Calculated,%: C 60.0; H 10.0. The bromine number is 112.4; Hydraulic sss number 21.4. Mol weight. .160.0.

Claims (1)

Invention Formula t The method of producing perentenic zools of polyhydric alcohols, characterized in that chloropentene is reacted with the corresponding polyhydric alcohol at 6 ° -12 ° C in a polar solvent, for example dimethylsulfide, in the presence of silk, followed by isolation of the target product by known techniques.