SU71376A1 - Method for producing alkyl derivatives of malonic ester - Google Patents

Method for producing alkyl derivatives of malonic ester

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Publication number
SU71376A1
SU71376A1 SU82A SU356230A SU71376A1 SU 71376 A1 SU71376 A1 SU 71376A1 SU 82 A SU82 A SU 82A SU 356230 A SU356230 A SU 356230A SU 71376 A1 SU71376 A1 SU 71376A1
Authority
SU
USSR - Soviet Union
Prior art keywords
malonic ester
alkyl derivatives
malonic
producing alkyl
ester
Prior art date
Application number
SU82A
Other languages
Russian (ru)
Inventor
И.Х. Горбовицкий
О.Ю. Магидсон
Е.И. Метелькова
Original Assignee
И.Х. Горбовицкий
О.Ю. Магидсон
Е.И. Метелькова
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 И.Х. Горбовицкий, О.Ю. Магидсон, Е.И. Метелькова filed Critical И.Х. Горбовицкий
Priority to SU82A priority Critical patent/SU71376A1/en
Application granted granted Critical
Publication of SU71376A1 publication Critical patent/SU71376A1/en

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

Description

Как известно, получение моно- и диалкилмалоновых эфиров обычно проводитс  путем нагревани  натриет вой соли малонового или моноалкилмалонового эфира с соответствующим галоидалкилом в абсолютном спирте. Практически это проводитс  следующим образом. Рассчитанное количество металлического натри  раствор ют в избытке абсолютного спирта, после чего добавл ют малоновый эфир или его моноалкилпроизводное, затем галоидный алкил и нагревают до исчезновени  щелочной реакции. При попытке получени  в этих услови х этил-(1-метибутил)-малонового эфира выход последнего составил лишь 25% от теоретического.As is known, the preparation of mono- and dialkyl smalll esters is usually carried out by heating the sodium salt of a malonic or monoalkyl malonic ester with the corresponding haloalkyl in absolute alcohol. Practically, this is done as follows. The calculated amount of metallic sodium is dissolved in an excess of absolute alcohol, after which malonic ester or its monoalkyl derivative is added, then the alkyl halide is heated and the alkaline reaction disappears. In an attempt to obtain ethyl (1-metibutyl) malonic ester under these conditions, the yield of the latter was only 25% of the theoretical value.

Одной из причин плохого выхода в данном и в других подобных случа х  вл етс  побочный процесс образовани  значительных количеств простого эфира за счет взаимодействи  этилата натри  с галоидалкилом .One of the reasons for the poor yield in this and other similar cases is the side process of the formation of significant amounts of ether due to the interaction of sodium ethoxide with a haloalkyl.

Известно также получение алкилмалоновых эфиров с применением при этом натри  в эфирной средеIt is also known to produce alkyl malonic esters using sodium in the ether medium.

без промежуточного образовани  алкогол та; однако и этот прием не всегда ведет к удовлетворительным выходам.without intermediate education of alcohol; however, this technique does not always lead to satisfactory yields.

Согласно изобретению предварительно отгон ют весь спирт от раствора натриевой соли малонового или моноалкилмалонового эфира с помощью сухого толуола в виде азеотропной смеси и далее процесс конденсации указанной соли с галоидалкилом провод т в толуольной среде. Такид путем удалось резко повысить выход моно- и диалкилпроизводных малонового эфира.According to the invention, all alcohol is preliminarily distilled from the solution of the sodium salt of a malonic or monoalkyl malonic ester using dry toluene as an azeotropic mixture, and then the process of condensation of said salt with a haloalkyl is carried out in toluene. Takid managed to dramatically increase the yield of mono- and dialkyl derivatives of malonic ether.

/Предмет изобретени / Subject invention

Способ получени  алкилпроизводных малонового эфира взаимодействием натриевых производных малоиового или моноалкилл1алоновогоэфира с галоидными алкилами в инертной среде и в отсзтствии спирта, отличающийс  тем, что к натриевому производному, образующемус  из алкогол та и малонового или моноалкилмалонового эфира вThe method of producing alkyl derivatives of malonic ester by reacting sodium derivatives of a low-alumina or monoalkyl-1-ester with alkyl halides in an inert environment and in the absence of an alcohol, characterized in that

6767

SU82A 1947-05-15 1947-05-15 Method for producing alkyl derivatives of malonic ester SU71376A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU82A SU71376A1 (en) 1947-05-15 1947-05-15 Method for producing alkyl derivatives of malonic ester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU82A SU71376A1 (en) 1947-05-15 1947-05-15 Method for producing alkyl derivatives of malonic ester

Publications (1)

Publication Number Publication Date
SU71376A1 true SU71376A1 (en) 1947-11-30

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ID=52581008

Family Applications (1)

Application Number Title Priority Date Filing Date
SU82A SU71376A1 (en) 1947-05-15 1947-05-15 Method for producing alkyl derivatives of malonic ester

Country Status (1)

Country Link
SU (1) SU71376A1 (en)

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