SU721419A1 - Method of preparing dihydrazone of pyrotartaric aldehyde - Google Patents

Method of preparing dihydrazone of pyrotartaric aldehyde Download PDF

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Publication number
SU721419A1
SU721419A1 SU772535532A SU2535532A SU721419A1 SU 721419 A1 SU721419 A1 SU 721419A1 SU 772535532 A SU772535532 A SU 772535532A SU 2535532 A SU2535532 A SU 2535532A SU 721419 A1 SU721419 A1 SU 721419A1
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SU
USSR - Soviet Union
Prior art keywords
dihydrazone
aldehyde
yield
hydrazine hydrate
target product
Prior art date
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SU772535532A
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Russian (ru)
Inventor
Сергей Иванович Завьялов
Людмила Федоровна Овечкина
Original Assignee
Институт Органической Химии Им. Н.Д.Зелинского Ан Ссср
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Priority to SU772535532A priority Critical patent/SU721419A1/en
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Publication of SU721419A1 publication Critical patent/SU721419A1/en

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Description

(54) СПОСОБ ПОЛУЧЕНИЯ ДИГИДРАЗОНА ПИРОВИНОГРАДНОГО(54) METHOD FOR OBTAINING DIHYDRAZONE PYROGRAD

Claims (1)

АЛЬДЕГИДА Полученный дигидразон не дает депрес сии температуры плавлени  в смешанно пробе с известны образцом и совпаде с ним по R J V По сравнению с известными предлагаемый способ получени  дигидразона пировиноградного альдегида позвол ет повысить выход целевого продукта до 75%, то есть на 25%, устранить применение дл  проведени  реакции огнеопасного растворител  (спирта) и использовать в качестве исходного вешества доступный и устойчивый пропаргиловый спирт; кроме того, конденсаци  ацетиловых спиртов с гидразийом до дигидразонов - дикарбоновых соединений, используетс  в данном случае впервые. Формула изобретени  Способ получени  дигидразона пировиноградного альдегида из гидразингидрата , отличающийс  тем, что, с целью повьшени  выхода целевого продукта и упрощени  процесса , гидразингидрат подвергают взаимодействию с пропаргиловым спиртом в водном растворе в присутствии уксусной кислоты при температуре кипени  реакционной массы с последующим выделением целевого продукта, Источники информации, прин тые во внимание при экспертизе 1. Studis of ort Melthylglyoxal bis (guanylhidrasone) Analogs, IV Acetylation Studies, T.K.Llao, F.Baiocchi, C.C.Cheng, J.Org, Chem. 30,562, 1963 (прототип) .ALDEHYDE The resulting dihydrazone does not depress the melting temperature in a mixed sample with a known sample and coincides with it in RJV. Compared with the known, the proposed method for producing pyruvic aldehyde dihydrazone improves the yield of the target product to 75%, i.e. by 25%, carrying out the reaction of a flammable solvent (alcohol) and using available and stable propargyl alcohol as a starting material; In addition, the condensation of acetyl alcohols with hydrazium to dihydrazones, dicarboxylic compounds, is used in this case for the first time. The method of obtaining pyruvic aldehyde dihydrazone from hydrazine hydrate, characterized in that, in order to increase the yield of the target product and simplify the process, the hydrazine hydrate is reacted with propargyl alcohol in an aqueous solution in the presence of acetic acid at the boiling point of the reaction mass, followed by isolation of the desired product Information taken into account in the examination 1. Studis of ort Melthylglyoxal bis (guanylhidrasone) Analogs, IV Acetylation Studies, TKLlao, F.Baiocchi, CCCheng, J.Org, Chem. 30,562, 1963 (prototype).
SU772535532A 1977-10-20 1977-10-20 Method of preparing dihydrazone of pyrotartaric aldehyde SU721419A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU772535532A SU721419A1 (en) 1977-10-20 1977-10-20 Method of preparing dihydrazone of pyrotartaric aldehyde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU772535532A SU721419A1 (en) 1977-10-20 1977-10-20 Method of preparing dihydrazone of pyrotartaric aldehyde

Publications (1)

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SU721419A1 true SU721419A1 (en) 1980-03-15

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