Show metadata Hide metadata

(19)

(11)

2 393 141

(13)

(51)

IPC

C07B59/00(2006-01-01)

C07C273/04(2006-01-01)

(21) (22)

Application

2008147065/04, 2008-12-01

(24)

Start date

2008-12-01

(22)

Actual filing date

2008-12-01

(45)

Published

2010-06-27

(72)

Inventor

Ehl'Man Aleksandr RehmovichBatov Aleksandr Evgen'EvichSmirnov Viktor Ivanovich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'JuGosudarstvennoe Unitarnoe Predprijatie G. Moskvy Nauchnyj I Klinicheskij Tsentr

C-UREA SYNTHESIS METHOD Russian patent published in 2010 - IPC C07B59/00 C07C273/04

Abstract RU 2393141 C1

FIELD: chemistry.

SUBSTANCE: invention relates to a method for synthesis of ¹³C-urea by reacting ammonia with carbon monoxide ¹³CO in the presence of oxygen, taken in molar ratio ranging from 8.9:2.8:1 to 4:2:1 at 15-25°C and pressure of 25-35 atm. The catalyst used is selenium powder taken in molar ratio Se:¹³CO ranging from 1:790 to 1:158. The solvent used is tetrahydrofuran or a mixture of tetrahydrofuran and methanol.

EFFECT: invention enables to obtain urea containing the stable ¹³C isotope with isotopic purity of not less than 99% in a single step.

1 cl, 6 ex

Similar patents RU2393141C1

Title	Year	Author	Number
METHOD OF PRODUCING C-UREA	2016	Elman Aleksandr Removich Ovsyannikova Lyudmila Vasilevna Davydov Igor Eduardovich Kushnarev Dmitrij Igorevich Gubanov Oleg Vitalevich Zyryanov Sergej Mikhajlovich Sidko Yurij Anatolevich	RU2638837C1
METHOD OF PRODUCING (C-CARBONYL)DIMETHYL PHTHALATE	2011	Ehl'Man Aleksandr Rehmovich Ovsjannikova Ljudmila Vasil'Evna	RU2470008C1
METHOD FOR PREPARING SATURATED ALIPHATIC CARBOXYLIC ACIDS AND METHODS FOR PREPARING THEIR DERIVATIVES (VARIANTS)	2006	Ehl'Man Aleksandr Rehmovich Batov Aleksandr Evgen'Evich	RU2311402C1
METHOD OF PRODUCING CARBAMIDE, LABELLED WITH STABLE C ISOTOPE	2009	Korneeva Galina Aleksandrovna Noskov Jurij Gennad'Evich Kron Tat'Jana Evgen'Evna Kulik Aleksandr Viktorovich Temkin Oleg Naumovich Bruk Lev Grigor'Evich Oshanina Irina Valer'Evna Zakharova Dar'Ja Sergeevna Kuz'Min Sergej Georgievich	RU2415837C2
METHOD FOR OBTAINING 2-ETHYL-3,5-DIMETHYL PYRIDINE	2016	Dzhemilev Usein Memetovich Kutepov Boris Ivanovich Grigoreva Nellya Gennadievna Filippova Nadezhda Aleksandrovna Agliullin Marat Radikovich Bikbaeva Vera Rafaelevna	RU2644166C2
METHOD OF PRODUCING METHYL FORMATE, TRACED WITH STABLE CARBON ISOTOPE C	2015	Kron Tatjana Evgenevna Noskov Jurij Gennadevich Bolotov Pavel Mikhajlovich Korneeva Galina Aleksandrovna	RU2602081C1
METHOD FOR OBTAINING 2-ETHYL-3,5-DIMETHYL PYRIDINE	2016	Dzhemilev Usein Memetovich Kutepov Boris Ivanovich Grigoreva Nellya Gennadievna Filippova Nadezhda Aleksandrovna Khazipova Alfira Nailevna Mayak Anastasiya Anatolevna	RU2644164C2
METHOD OF OBTAINING CARBAMIDE LABELLED BY STABLE ISOTOPE C	2010	Noskov Jurij Gennad'Evich Rush Sergej Nikolaevich Kron Tat'Jana Evgen'Evna Korneeva Galina Aleksandrovna Temkin Oleg Naumovich Kuz'Min Sergej Georgievich	RU2440826C1
METHOD OF AMIDES OBTAINING FROM CARBONYL COMPOUNDS	2016	Pavel N. Kolesnikov Denis A. Chusov Oleg I. Afanas'Ev Victor I. Maleev	RU2620269C1
METHOD FOR SYNTHESIS OF 1,2,3,4,5,6,10,11,12,13,14,15,15a,15b-TETRADECAHYDRODICYCLONONE [b, d] SELENOPHENE	2008	Dzhemilev Usein Memetovich D'Jakonov Vladimir Anatol'Evich Timerkhanov Rustam Kamilevich Ibragimov Askhat Gabdrakhmanovich Popod'Ko Natal'Ja Romanovna Dzhemileva Galina Arkad'Evna	RU2383538C1

RU 2 393 141 C1

Authors

Ehl'Man Aleksandr Rehmovich

Batov Aleksandr Evgen'Evich

Smirnov Viktor Ivanovich

Dates

2010-06-27—Published

2008-12-01—Filed