SU425900A1 - Method of producing complex esters of o) -chloroalkylcarbonic acids - Google Patents

Method of producing complex esters of o) -chloroalkylcarbonic acids

Info

Publication number
SU425900A1
SU425900A1 SU1802105A SU1802105A SU425900A1 SU 425900 A1 SU425900 A1 SU 425900A1 SU 1802105 A SU1802105 A SU 1802105A SU 1802105 A SU1802105 A SU 1802105A SU 425900 A1 SU425900 A1 SU 425900A1
Authority
SU
USSR - Soviet Union
Prior art keywords
acids
chloroalkylcarbonic
complex esters
producing complex
yield
Prior art date
Application number
SU1802105A
Other languages
Russian (ru)
Inventor
В. Ю. Ковтун М. Кольцова В. Г. Яшунский изобретени Е. Башарова
Original Assignee
Институт биофизики
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Институт биофизики filed Critical Институт биофизики
Priority to SU1802105A priority Critical patent/SU425900A1/en
Application granted granted Critical
Publication of SU425900A1 publication Critical patent/SU425900A1/en

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

1one

Изобретение относитс  к способу получени  сложных эфиров ю-хлоралкилкарбоновых кислот,  вл ющихс  полупродуктами дл  синтеза многих лекарственных и биологически активных веществ.This invention relates to a process for the preparation of esters of u-chloroalkylcarboxylic acids, which are intermediates for the synthesis of many medicinal and biologically active substances.

Известен способ получени  сложных эфиров хлорзамещенных алкилкарбоновых кислот, в частности 7-хлормасл ной кислоты, заключающийс  в том, что кип щую смесь соответствующего лактона и спирта обрабатывают сухим хлористым водородом в присутствии азеотропообразующих агентов. Выход продукта 20- 60%.A known method for the preparation of chloro-substituted alkylcarboxylic acid esters, in particular 7-chlorobasic acid, is that the boiling mixture of the corresponding lactone and alcohol is treated with dry hydrogen chloride in the presence of azeotropic agents. The yield of the product is 20-60%.

С целью повышени  выхода продукта, упрощени  процесса и сокращени  расхода реагентов предложено вести процесс в присутствии тионилхлорида.In order to increase the yield of the product, simplify the process and reduce the consumption of reagents, it was proposed to conduct the process in the presence of thionyl chloride.

Выход продукта повышаетс  до 80-90%.The yield of the product increased to 80-90%.

Пример 1. К смеси 88 г бутиролактона и 136 г хлористого тионила прибавл ют 220 г абсолютного этилового спирта в течение 30 мин. Реакционную массу кип т т до прекращени  выделени  газов 1-1,5 час. Избыточное количество спирта отгон ют при нормальном давлении, а остаток перегон ют в вакууме, собира  фракцию при 70-75°С/ /10 мм.Example 1. To a mixture of 88 g of butyrolactone and 136 g of thionyl chloride were added 220 g of absolute ethanol over 30 minutes. The reaction mass is boiled until gas evolution 1-1.5 hours. The excess amount of alcohol is distilled off under normal pressure, and the residue is distilled in vacuum, collecting the fraction at 70-75 ° C / / 10 mm.

Получают 127 г этилового эфира 4-хлормасл ной кислоты.127 g of ethyl 4-chloromethyl acid are obtained.

Выход 82,5%; ng 1,432.Yield 82.5%; ng 1,432.

Пример 2. К смеси 8,6 г бутиролактона и 13,5 г хлористого тионила прибавл ют по капл м 27 г амилового спирта в течение 30 мин при 0°С. Реакционную массу перемешивают 30 мин при 0°С, 1 час при комнатной температуре и кип т т в течение 2 час, затем перегон ют в вакууме, собира  фракцию, кип щую при 105-109°С/5 мм.Example 2. To a mixture of 8.6 g of butyrolactone and 13.5 g of thionyl chloride was added dropwise 27 g of amyl alcohol over 30 minutes at 0 ° C. The reaction mass is stirred for 30 minutes at 0 ° C, 1 hour at room temperature and boiled for 2 hours, then distilled in vacuum, collecting the fraction boiling at 105-109 ° C / 5 mm.

Получают 16,9 г амилового эфира 4-хлормасл ной кислоты.16.9 g of amyl 4-chloromethyl acid are obtained.

Выход 87%: ng 1,438.Exit 87%: ng 1,438.

Пример 3. К смеси 4,3 г валеролактона и 4,8 г хлористого тиоиила прибавл ют по капл м 8,8 г абсолютного этилового спирта лри 0°С. Реакционную массу перемеш ивают 1 час при 0°С, 1 час при 20°С и 2,5 час при кип чении. Спирт отгон ют, а остаток перегон ют .Example 3. To a mixture of 4.3 g of valerolactone and 4.8 g of thioiyl chloride was added dropwise 8.8 g of absolute ethyl alcohol at 0 ° C. The reaction was stirred for 1 hour at 0 ° C, 1 hour at 20 ° C, and 2.5 hours at reflux. The alcohol is distilled off and the residue is distilled.

Получают 4,9 г этилового эфира 5-хлорвалериановой кислоты; т. кип. 75-76°С/10 мм.4.9 g of 5-chloro-valeric acid ethyl ester are obtained; m.p. 75-76 ° C / 10 mm.

Выход 77%; ng 1,430.Yield 77%; ng 1,430.

Предмет изобретени Subject invention

Способ получени  сложных эфиров ш-хлоралкилкарбоновых кислот путе.м взаимодействи  соответствующих лактонов со спиртами в присутствии галоидирующего агента при нагревании с последующим выделением продукта известными приемами, отличающий3 с   тем, что, с целью повышени  выхода продукта и упрощени  процесса, в качестве га4 лоидирующего агента используют тионилхлорид .The method of producing esters of b-chloroalkylcarboxylic acids by reacting the corresponding lactones with alcohols in the presence of a halogenating agent when heated, followed by separation of the product by known methods, differs3 so that, in order to increase product yield and simplify the process, thionyl chloride.

SU1802105A 1972-06-26 1972-06-26 Method of producing complex esters of o) -chloroalkylcarbonic acids SU425900A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1802105A SU425900A1 (en) 1972-06-26 1972-06-26 Method of producing complex esters of o) -chloroalkylcarbonic acids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1802105A SU425900A1 (en) 1972-06-26 1972-06-26 Method of producing complex esters of o) -chloroalkylcarbonic acids

Publications (1)

Publication Number Publication Date
SU425900A1 true SU425900A1 (en) 1974-04-30

Family

ID=20519397

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1802105A SU425900A1 (en) 1972-06-26 1972-06-26 Method of producing complex esters of o) -chloroalkylcarbonic acids

Country Status (1)

Country Link
SU (1) SU425900A1 (en)

Similar Documents

Publication Publication Date Title
GB799269A (en) Production of intermediates for the synthesis of reserpine and related compounds
SU421177A3 (en) METHOD OF OBTAINING LOWER ALKYL ETHER (±) DEN-CHRYZANTEMIC ACID
SU425900A1 (en) Method of producing complex esters of o) -chloroalkylcarbonic acids
JP2595094B2 (en) Method for producing ω-hydroxy- (ω-3) -keto fatty acid
Matsui et al. Studies on Chrysanthemic Acid: Part VII. Selective Synthesis of (±)-trans Chrysanthemic Acid from (±)-Pyrocin
US3910958A (en) Process for preparing arylacetic acids and esters thereof
US3927084A (en) Process for the production of 2(4-alkylphenyl)propionic acid
JPH0311046A (en) Alpha-(omega-cyanoalkanoyl)-gamma-butyrolactone and preparation thereof
SU490797A1 (en) The method of obtaining 2-arylaminopolyfluorobenzoic acids
US2919289A (en) Method of synthesis of dialkyl alphaketoglutarate from alkyl 2, 5-dialkoxy-2, 5-dihydro-2-furoate
SU407902A1 (en) METHOD OF OBTAINING DIETHYL ETHER 3,4,5,6-TETRACHLOROPIRIDYL-2-MALON ACID
US2540307A (en) 3, 4-diethoxymandelic acid and process for preparing same
SE7909596L (en) PROCEDURE FOR PREPARING BASIC ESTERS OF SUBSTITUTED HYDROXICYCLOHEXANCHOXYL ACIDS
RU731711C (en) Method of producing monomethyl ethers of aliphatic carboxylic acids
Ferraboschi et al. An improved synthesis of (S)-3-methyl-γ-butyrolactone
SU536160A1 (en) The method of obtaining 1-aryl-3,3-diphenylpropanone-1
SU454207A1 (en) The method of obtaining 2-bromo-3-aminopyridine or its derivative in the amino group
SU791726A1 (en) Method of preparing glycerine dichlorohydrin
SU390069A1 (en) Method of producing phenylglyoxyl esters
SU144837A1 (en) The method of obtaining analeptic drug Subecholin
SU482449A1 (en) The method of obtaining - (-phenylethyl) lactam
US2665308A (en) Process for making n-(1, 1-dimethyl-3-hydroxybutyl)-lactamide
SU437381A1 (en) Preparation method, -2-methylpropanondianabazina
SU517578A1 (en) Method for producing substituted carboxylic acids
SU407884A1 (en) METHOD OF OBTAINING CHLOROMETHILNITRAMINS