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2 672 470

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IPC

C07D241/12(2006-01-01)

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Application

2017124503, 2017-07-10

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Start date

2017-07-10

(22)

Actual filing date

2017-07-10

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Published

2018-11-15

(72)

Inventor

Khafizova Lejla OsmanovnaShajbakova Mariya GennadevnaRikhter Nikita AndreevichTyumkina Tatyana ViktorovnaDzhemilev Usein Memetovich

(73)

Holder

Federalnoe Gosudarstvennoe Byudzhetnoe Uchrezhdenie Nauki Institut Neftekhimii I Kataliza Rossijskoj Akademii Nauk

PRODUCTION PROCESS OF 2,3,5,6-TETRAFENYL(BENZYL)PYRASINE Russian patent published in 2018 - IPC C07D241/12

Abstract RU 2672470 C1

FIELD: chemistry; technological processes.

SUBSTANCE: invention relates to a production process of 2,3,5,6-tetraphenyl(benzyl)pyrazines (1), where R=Ph, CH₂Ph. New production process of 2,3,5,6-tetraphenylpyrazines and 2,3,5,6-tetrabenzylpyrazines is the interaction of nitriles of general formula R-C≡N, (where R=Ph, PhCH₂) with EtAlCl₂, in the presence of magnesium (Mg, powder) and Cp₂TiCl₂catalyst, at 20–22 °C and atmospheric pressure for 4–8 hours.

EFFECT: new production process of 2,3,5,6-tetraphenylpyrazines and 2,3,5,6-tetrabenzylpyrazines is developed which allows to shorten the reaction time and increase the yield of 2,3,5,6-tetraphenyl(benzyl)pyrazines to 68–91 %.

1 cl, 1 tbl, 1 ex

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RU 2 672 470 C1

Authors

Khafizova Lejla Osmanovna

Shajbakova Mariya Gennadevna

Rikhter Nikita Andreevich

Tyumkina Tatyana Viktorovna

Dzhemilev Usein Memetovich

Dates

2018-11-15—Published

2017-07-10—Filed