Zobrazeno 1 - 10
of 41
pro vyhledávání: '"V. A. Ferapontov"'
Publikováno v:
Russian Chemical Bulletin. 64:859-863
5-R-Pyrrolidin-2-ones were synthesized by Pd/Sibunit-catalyzed C—O hydrogenolysis of 5-R-5-hydroxypyrrolidin-2-ones with molecular hydrogen.
Autor:
V. A. Ferapontov, O. V. Turova, Maxim G. Vinogradov, E. V. Starodubtseva, Marina I. Struchkova
Publikováno v:
Tetrahedron: Asymmetry. 20:2121-2124
The catalytic asymmetric hydrogenation of acylsuccinates using RuCl3 as a precatalyst and atropisomeric diphosphines as chiral auxiliaries allows the synthesis of optically active 2-alkylparaconic acid esters in preparative yields with enantioselecti
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 311:61-65
The kinetics of asymmetric hydrogenation of methyl levulinate in the presence of the (COD)Ru(2-methylallyl)2–BINAP–HCl catalytic system was studied. The kinetic order in H2, as well as in the catalyst, was found to be equal to 1, whereas the kine
Autor:
Marina I. Struchkova, V. A. Ferapontov, L. S. Gorshkova, O. V. Turova, Maxim G. Vinogradov, E. V. Starodubtseva
Publikováno v:
Tetrahedron. 64:11713-11717
A convenient one-step synthesis of chiral γ-lactones has been performed. The method is based on enantioselective hydrogenation of γ-ketoesters using the RuCl 3 –BINAP–HCl catalytic system. Chiral γ-lactones (91–99% ee) have been isolated in
Publikováno v:
Russian Chemical Bulletin. 54:2374-2378
The rate of hydrogenation of γ-ketoesters MeCOCH2CH2COOR (R = Et, Pri, But) in the presence of the chiral RuII—BINAP catalyst (BINAP is 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl) greatly increases upon the addition of 5–10 equivalents of H
Autor:
G. V. Chel'tsova, G. L. Heise, V. A. Ferapontov, D. V. Kurilov, O. V. Shishk, Maxim G. Vinogradov, L. S. Gorshkova
Publikováno v:
Russian Chemical Bulletin. 52:1841-1846
An improved procedure was developed for asymmetric reduction of acetophenone and propiophenone by the chiral reagent NaAl(IPTOLate)H2. This procedure is based on isolation of the chiral alcohol that formed as a crystalline host—guest complex with t
Autor:
G. L. Heise, V. A. Ferapontov, L. S. Gorshkova, I. V. Razmanov, V. A. Pavlov, Maxim G. Vinogradov, G. V. Chel\\'tsova, O. R. Malyshev
Publikováno v:
Russian Chemical Bulletin. 52:471-479
Prochiral substrates (alkyl aryl ketones, cyclopropyl methyl ketone, 1-indanone, 1-tetralone, ethyl 2-oxo-4-phenylbutyrate, and N-(diphenylphosphinyl)acetophenoneimine) were subjected to asymmetric reduction with aluminum hydride reagents, which were
Autor:
E. V. Starodubtseva, Maxim G. Vinogradov, V. A. Ferapontov, Sergei G. Zlotin, O. V. Turova, Nikolai S. Ikonnikov, Ilya V. Kuchurov
Publikováno v:
Mendeleev Communications. 22:184-186
Asymmetric hydrogenation of ethyl 4-chloro-3-oxobutyrate and dimethyl acetylsuccinate in high pressure CO 2 using [RuCl 2 (C 6 H 6 )] 2 –( R )-BINAP as the catalyst provides high ee values for the products.
Autor:
M. G. Vinogradov, V. A. Pavlov, G. L. Heise, E. V. Starodubtseva, V. A. Ferapontov, O. R. Malyshev
Publikováno v:
Russian Chemical Bulletin. 49:728-731
The catalytic activity and the enantioselectivity manifested by cationic chiral binaphthylbisphosphine ruthenium complexes in asymmetric hydrogenation of β-keto esters were studied. The effects of the nature of the solvent, the reaction temperature,
Autor:
G. V. Chel'tsova, L. S. Gorshkova, I. V. Razmanov, V. A. Ferapontov, O. R. Malyshev, M. G. Vinogradov, O. V. Mikhalev, G. L. Heise, V. A. Pavlov
Publikováno v:
Russian Chemical Bulletin. 49:460-465
New stereoselective reducing reagents were preparedin situ by modification of NaAlH4 with various chiral diols. The efficiency of 1,4- and 1,3-diols as chiral auxiliaries in the reactions of alkyl aryl ketones with modified NaAlH4 was considerably hi