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2 577 545

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(51)

IPC

C07C227/16(2006-01-01)

C07C229/52(2006-01-01)

(21) (22)

Application

2015108621/04, 2015-03-11

(24)

Start date

2015-03-11

(22)

Actual filing date

2015-03-11

(45)

Published

2016-03-20

(72)

Inventor

Begunov Roman SergeevichValjaeva Asja NikolaevnaShebunina Tatjana ViktorovnaDobretsova Natalja Olegovna

(73)

Holder

Federalnoe Gosudarstvennoe Bjudzhetnoe Obrazovatelnoe Uchrezhdenie Vysshego Professionalnogo Obrazovanija Gosudarstvennyj Universitet Im. P.G. Demidova"

METHOD FOR OBTAINING 4-(3-AMINO-4-NITROPHENOXY)BENZOIC ACID UNDER IMPACT OF ULTRASOUND Russian patent published in 2016 - IPC C07C227/16 C07C229/52

Abstract RU 2577545 C1

FIELD: chemistry.

SUBSTANCE: method includes process of halogen substitution in 2-nitro-5-chloroaniline in interaction with 4-hydroxybenzoic acid in DMSO in presence of K₂CO₃with ultrasonic activation. Aromatic nucleophilic substitution of chlorine is carried out in DMSO in presence of K₂CO₃ at ultrasound frequency, equal 37 kHz, at temperature 80°C for 2 h and molar ratio of 2-nitro-5-chloroaniline:4-hydroxybenzoic acid = 1:1.05.

EFFECT: method makes it possible to reduce the number of stages, to reduce duration and temperature of reaction of aromatic nucleophilic substitution, to increase target product output.

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RU 2 577 545 C1

Authors

Begunov Roman Sergeevich

Valjaeva Asja Nikolaevna

Shebunina Tatjana Viktorovna

Dobretsova Natalja Olegovna

Dates

2016-03-20—Published

2015-03-11—Filed