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2 522 551

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IPC

C07C211/52(2006-01-01)

C07C209/10(2006-01-01)

(21) (22)

Application

2012157048/04, 2012-12-25

(24)

Start date

2012-12-25

(22)

Actual filing date

2012-12-25

(45)

Published

2014-07-20

(72)

Inventor

Kazin Vjacheslav NikolaevichSibrikov Sergej GeorgievichPliss Evgenij MoiseevichKazina Ekaterina Gennad'EvnaTikhonov Ivan ViktorovichMitrofanova Galina Pavlovna

(73)

Holder

Federal'Noe Gosudarstvennoe Bjudzhetnoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Gosudarstvennyj Universitet Im. P.G. Demidova"

METHOD OF OBTAINING 3,3'-DINITRO-4,4'-BIS(N,N-DIMETHYLAMINO)BENZOPHENONE Russian patent published in 2014 - IPC C07C211/52 C07C209/10

Abstract RU 2522551 C1

FIELD: chemistry.

SUBSTANCE: invention relates to a method of obtaining 3,3'-dinitro-4,4'-bis(N,N-dimethylamino)benzophenone, which can be applied as an intermediate product in synthesis of soluble polyimides. The method consists in processing of 3,3'-dinitro-4,4'-dichlorobenzophenone in N,N-dimethylformamide or N,N-dimethylacetamide with hydroxides of alkali metals in the form of 20-50% water solution at a temperature of 130-140°C. A molar ratio 3,3'-dinitro-4,4'-dichlorobenzophenone:NaOH (KOH): (DMFA (DMAA) constitutes 1:4÷10:20÷30.

EFFECT: method makes it possible to obtain compounds with high output and a high degree of purity.

5 ex

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RU 2 522 551 C1

Authors

Kazin Vjacheslav Nikolaevich

Sibrikov Sergej Georgievich

Pliss Evgenij Moiseevich

Kazina Ekaterina Gennad'Evna

Tikhonov Ivan Viktorovich

Mitrofanova Galina Pavlovna

Dates

2014-07-20—Published

2012-12-25—Filed