Главная Новые поступления Описание Шлюз Z39.50

Базы данных


Труды сотрудников Института органического синтеза УрО РАН - результаты поиска

Вид поиска

Область поиска
в найденном
 Найдено в других БД:Публикации Чарушина В.Н. (1)
Формат представления найденных документов:
полныйинформационныйкраткий
Отсортировать найденные документы по:
авторузаглавиюгоду изданиятипу документа
Поисковый запрос: (<.>K=DIASTEREOMERS<.>)
Общее количество найденных документов : 14
Показаны документы с 1 по 10
 1-10    11-14 
1.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of 4-amino derivatives of 5-oxoproline [Text] / V. P. Krasnov, A. Yu. Vigorov, I. A. Nizova, T. V. Matveeva, A. N. Grishakov, I. V. Bazhov, A. A. Tumashov, M. A. Ezhikova, M. I. Kodess // European Journal of Organic Chemistry. - 2007. - № 25. - P4257-4266
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The possibility of obtaining the stereoisomeric derivatives of 5-oxoproline and glutamic acid with a tertiary amino group at C-4, using the nucleophilic substitution of bromine in dimethyl (2S,4RS)-4-bromo-N-phthaloylglutamate with secondary amines followed by resolution of diastereomers and removal of protecting groups has been studied. We have shown that the reaction with arylamines results in optically pure 5-oxoproline derivatives in high yields. In the case of more basic amines, the reaction is accompanied by racemization, and the target products can be isolated only as diastereomeric racemates.

Найти похожие

2.
Инвентарный номер: нет.
   
   D 62


   
    Direct diastereoselective addition of l-menthol to activated 1,2,4-triazin-5(4H)-one [Text] / O. N. Chupakhin, G. V. Zyryanov, V. L. Rusinov, V. P. Krasnov, G. L. Levit, M. A. Koroleva, M. I. Kodess // Tetrahedron Letters. - 2001. - Vol. 42, № 12. - P2393-2395
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: For the first time in a triazine series it has been found that addition of a chiral O-nucleophile, l-menthol, to the C6-unsubstituted atom of 3-phenyl-1,2,4-triazin-5(4H)-one 1 activated by aliphatic acid anhydrides proceeds diastereoselectively to form a mixture of 1-acyl-6-[(1?R,3?R,4?S)-menthyl-3?)]-3-phenyl-(6S)-1,6-dihydro-1,2,4-triazin-5(4H)-ones 2 and 1-acyl-6-[(1?R,3?R,4?S)-menthyl-3?)]-3-phenyl-(6R)-1,6-dihydro-1,2,4-triazin-5(4H)-ones 3 in which the diastereomers 2 predominate. The diastereoselectivity of the process improves as the size of the N1-acyl substituent increases????

Найти похожие

3.
Инвентарный номер: нет.
   
   F 94


   
    From oxides of internal perfluoroolefins to fluorocontaining camphor thiazolinylhydrazones [Text] / L. V. Saloutina, A. Ya. Zapevalov, M. I. Kodess, K. A. Lyssenko, M. Yu. Antipin, V. I. Saloutin, O. N. Chupakhin // Journal of Fluorine Chemistry. - 2003. - Vol. 120, № 1. - P41-47
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The reaction of oxides of internal trans- and cis-perfluoroolefins with (1S, 4S)- or racemic camphor thiosemicarbazone leads to the formation of trans- and cis-isomers of (1S, 4S)- or racemic camphor 5?-fluoro-4?-hydroxy-4?,5?-di(perfluoroalkyl)-1?,3?-thiazolinyl-2?-hydrazones, respectively. Unsymmetrical dodecafluoro-2,3-epoxyhexane yields a mixture of regioisomeric hydrazones. The molecular structure of the trans-isomer of (1S, 4S)-camphor 5?-fluoro-4?-hydroxy-4?,5?-bis(trifluoromethyl)-1?,3?-thiazolinyl-2?-hydrazone has been established by X-ray crystallography. The quite rare example of cocrystallization of two diastereomers of the latter in homochiral crystal (sp. group P21) has been revealed????

Найти похожие

4.
Инвентарный номер: нет.
   
   R 30


   
    Reactions of 3-nitro-2-trihalomethyl-2H-chromenes with S-and N-nucleophiles. Synthesis and stereochemistry of 2,3,4-trisubstituted chromanes [Electronic resource] / V. Yu. Korotaev, V. Ya. Sosnovskikh, I. B. Kutyashev, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2006. - Vol. 55, № 2. - P317-330
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The reactions of 3-nitro-2-trifluoromethyl-and 3-nitro-2-trichloromethyl-2H-chromenes with thiols and aromatic amines proceed via the nucleophilic addition type to the activated double bond to form 2,3,4-trisubstituted chromanes in high yields. The stereoisomeric compositions and structures of the diastereomers were determined by 1H, 19F NMR and 2D NOESY spectroscopies and X-ray diffraction analysis

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2006, 55 (2), 317.pdf
Найти похожие

5.
Инвентарный номер: нет.
   
   K 81


    Krasnov, V. P.
    Nucleophilic substitution of halogen in 4-halo derivatives of glutamic acid 3. High pressure effect on the stereochemical result of the reaction [Electronic resource] / V. P. Krasnov, M. A. Koroleva, G. L. Rusinov // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1996. - Vol. 45, № 3. - P543-544
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of diastereomeric dialkyl N-phthaloyl-4-haloglutamates withpara-anisidine were studied at high pressure, and an additional confirmation of the exactS N2 mechanism of the reactions was obtained. Quantitative parameters of the relative reactivity of the diastereomers were found in various solvents, which made it possible to perform the desired synthesis of products of diastereomeric substitution. kg]Key words kw]glutamic acid kw]diastereoselectivity kw]nucleophilic substitution kw]reaction rate constant kw]high pressure.

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1996, 45 (3), 543.pdf
Найти похожие

6.
Инвентарный номер: нет.
   
   K 81


    Krasnov, V. P.
    Nucleophilic-substitution of halogen in 4-halogenated derivatives of glutamic-acid. 1. Solvent effect [Electronic resource] / V. P. Krasnov, M. A. Koroleva // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1995. - Vol. 44, № 4. - P631-634
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
GLUTAMIC ACID -- DIASTEREOSELECTIVITY -- NUCLEOPHILIC SUBSTITUTION -- RATE CONSTANT -- SOLVENT EFFECT
Аннотация: The reaction of nucleophilic substitution of bromine by p-anisidine in dimethyl (2S,4S)- and (2S,4R)-N-phthaloyl-4-bromoglutamates proceeds according to the S(N)2 mechanism. The relative reactivity of diastereomers in various solvents was studied.

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1995, 44 (4), 631.pdf
Найти похожие

7.
Инвентарный номер: нет.
   
   N 91


   
    Nucleophilic-substitution of halogen in 4-halogenated derivatives of glutamic-acid. 2. Structural effects of arylamine as nucleophile [Electronic resource] / V. P. Krasnov, M. A. Koroleva, N. G. Evstigneeva, I. A. Nizova // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1995. - Vol. 44, № 4. - P635-638
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
GLUTAMIC ACID -- DIASTEREOSELECTIVITY -- NUCLEOPHILIC SUBSTITUTION -- RATE CONSTANT -- ARYLAMINE
Аннотация: Kinetics of nucleophilic substitution of halogen in diastereomeric dimethyl 4-bromo- and 4-iodoglutamates with ortho-, meta-, and para-substituted anilines was studied by HPLC. The threo-diastereomers of the halogenated derivatives react 3-5 times faster than the erythro ones. The structure of the transition state is discussed.

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1995, 44 (4), 635.pdf
Найти похожие

8.
Инвентарный номер: нет.
   
   R 30


   
    Reaction of alkyl 5,5-dimethyl-2-oxo-2,5-dihydrofuran-3-carboxylates with zinc enolates prepared from zinc and 1-arul-2-bromo-2-phenylethanones, 2 bromoindanone, and 2-bromo-6-methyltetralone [Electronic resource] / V. V. Shchepin, A. E. Korzun, M. I. Vakhrin, P. S. Silaichev, M. A. Ezhikova, M. I. Kodess // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2006. - Vol. 42, № 8. - P1169-1173
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Alkyl 5,5-dimethyl-2-oxo-2,5-dihydrofuran-3-carboxylates react with zinc enolates prepared from 1-aryl-2-bromo-2-phenylethanones, 2-bromo indanone, 2-bromo-6-methyltetralone and zinc with formation of ethyl 4-(2-aryl-2-oxo-1-phenyl-ethyl)-5,5-dimethyl-2-oxotetrahydrofuran-3-carboxylates, alkyl 5,5-dimethyl-2-oxo-4-(1-oxoindan-2-yl)tetrahydrofuran-3-carboxylates, and ethyl 5,5-dimethyl-4-(6-methyl-1-oxo-1,2,3,4-tetrahydronaphthalen-2-yl)-2-oxotetrahydrofuran-3-carboxylates respectively, mainly as single diastereomers

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2006, 42 (8), 1169.pdf
Найти похожие

9.
Инвентарный номер: нет.
   
   A 10


   
    A simple synthesis of the pentacyclic lamellarin skeleton from 3-nitro-2-(trifluoromethyl)-2H-chromenes and 1-methyl(benzyl)-3,4-dihydroisoquinolines / V. Yu. Korotaev, V. Ya. Sosnovskikh, A. Yu. Barkov, P. A. Slepukhin, M. A. Ezhikova, M. I. Kodess, Yu. V. Shklyaev // Tetrahedron. - 2011. - Vol. 67, № 45. - С. 8685-8698
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
LAMELLARIN ALKALOIDS -- ISOQUINOLINE DERIVATIVES -- HETEROCYCLIC SYSTEM
Аннотация: The basic structural framework of lamellarin alkaloids, 8,9-dihydro-6H-chromeno[4?,3?:4,5]pyrrolo[2,1-a]isoquinoline derivatives, has been obtained in good yields via Grob synthesis between 3-nitro-2-(trifluoromethyl)-2H-chromenes and 1-methyl-3,4-dihydroisoquinolines in refluxing isobutanol. In the case of 1-benzyl-3,4-dihydroisoquinolines, a dynamic NMR effect was observed in the 1H and 19F NMR spectra of the products as a result of restricted rotation about the single bond linking the benzene ring and the heterocyclic system. When the reaction was carried out with 3-nitro-2-(trichloromethyl)-2H-chromenes in toluene at room temperature, only Michael adducts, as a mixture of two diastereomers, were isolated.??????--------------------------------------------------------------------------------??

Найти похожие

10.
Инвентарный номер: нет.
   
   R 35


   
    Regioselective reaction of ortho-piperidinobenzaldehydes with pyrazolone [Electronic resource] / A. Yu. Platonova, E. V. Deeva, O. A. Zimovets, D. V. Shatunova, O. S. Eltsov, P. A. Slepukhin, T. V. Gluchareva, Yu. Yu. Morzherin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2011. - Vol.60, №5. - С. 961-964. - Bibliogr. : p. 964 (20 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
TERT-AMINO EFFECT -- PYRAZOLONE -- DIASTEREOMERS
Аннотация: Cyclization of 2 (4 R piperidino)benzaldehydes with 5 methyl 2 phenyl 2,4 dihydro 3H pyrazol 3 one proceeding via tert amino effect mechanism is stereoselective. Relative configu ration of (3R*,4aS*,5R*) 2,3,4,4a,5,6 hexahydro 1H benzo[c]quinolizine was established on the base of NMR spectroscopy data and X ray analysis

\\\\expert2\\NBO\\Russian Chemical Bulletin\\2011, 60 (5), 961-964.pdf
Найти похожие

 1-10    11-14 
 

Сиглы отделов ЦНБ УрО РАН


  бр.ф. - Бронированный фонд

  бф - Научно-библиографический отдел

  БХЛ - Фонд художественной литературы

  ИИиА -Фонд исторической литературы в ЦНБ УрО РАН

  ИМЕТ -Отдел ЦНБ в Институте металлургии УрО РАН

  кх - Отдел фондов (книгохранениe)

  МБА - Межбиблиотечный абонемент

  мф - Методический фонд

  ок - Отдел научной каталогизации

  оку - Отдел комплектования и учета

  орф - Обменно-резервный фонд

  пф - Читальный зал деловой и патентной информации

  рк - Фонд редкой книги

  ч/з - Главный читальный зал

  эр - Зал электронных ресурсов

  

Сиглы библиотек институтов и НЦ УрО РАН
© Международная Ассоциация пользователей и разработчиков электронных библиотек и новых информационных технологий
(Ассоциация ЭБНИТ)
Яндекс.Метрика