Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Elvira Shokova"'
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 10, Iss 1, Pp 2270-2278 (2014)
A very simple and convenient reaction for 1,3-diketone preparation from carboxylic acids and aromatic ketones in TFAA/TfOH system is described. When the β-phenylpropionic acids were used as starting materials, they initially gave 1-indanones and the
Externí odkaz:
https://doaj.org/article/6dd5065ebcd444bc8ce6462fa7552555
Publikováno v:
ARKIVOC, Vol 2008, Iss 4, Pp 26-32 (2008)
Externí odkaz:
https://doaj.org/article/af7db2957ef14e92bb215deeece104c6
Publikováno v:
Russian Journal of Organic Chemistry. 57:1295-1301
The adamantylation of adenine and N6-methyl- and N6,N6-dimethyladenines with 3-R-adamantan-1-ols (R = H, iso-Pr, CH2COOH, uracil-5-yl) in trifluoroacetic acid gave of 9-(3-R-adamantan-1-yl)adenines. The structures of 9-(adamantan-1-yl)- and N6-methyl
Autor:
Vladimir Kovalev, Elvira Shokova
Publikováno v:
Russian Journal of Organic Chemistry. 57:1089-1097
5-[3(4)-R-Adamantan-1-yl]salicylic acids [R = H, Alk, Ar, OH, NHC(S)NH2] have been synthesized by electrophilic substitution reactions of hydroxy- and bromoadamantanes with salicylic acid, as well as by reactions of 5-(3-hydroxyadamantan-1-yl)salicyl
Publikováno v:
Russian Journal of Organic Chemistry. 56:1770-1774
Trifluoroacetic anhydride was used as an efficient activator of the acylation of aryl methyl ketones with carboxylic acids in the presence of Bronsted and Lewis acids (SF3SO3H, MeSO3H, 4-MeC6H4SO3H·H2O, BF3·Et2O). In all cases, the products were th
Autor:
Victor L. Furer, Ivan Vatsouro, Elvira Shokova, Denis V. Chachkov, L.I. Potapova, Valery I. Kovalenko, Vladimir Kovalev
Publikováno v:
Journal of Molecular Modeling. 27
The IR spectra of p-(3-carboxy-1-adamantyl)thiacalix[4]arene (1-AdCOOHTC4A) have been studied. IR spectra of crystalline 1-AdCOOHTC4A obtained at room temperature or upon heating to 250 °C or its dilute solutions lack bands of free hydroxyl groups.
Autor:
L.I. Potapova, Vladimir Kovalev, V.L. Furer, Ivan Vatsouro, Elvira Shokova, Valeri I. Kovalenko
Publikováno v:
Journal of Molecular Structure. 1171:207-213
Thiacalix [4]arene (TC4A), p-tert-butylthiacalix [4]arene (t-BuTC4A) and p-(1-adamantyl)thiacalix [4]arene (1-AdTC4A) IR spectra were studied. Calculated energies and IR spectra of the various conformers (cone, partial cone, 1,2-alternate, and 1,3-al
Publikováno v:
E3S Web of Conferences, Vol 274, p 04002 (2021)
The IR spectra of p-(3-carboxy-1-adamantyl)thiacalix[4]arene (1) were studied. IR spectra of compound 1 do not contain bands of free hydroxyl groups. The νOH value at 3377 cm-1 signifies the formation of an intramolecular H-bond along the lower edge
Autor:
V.L. Furer, Denis V. Chachkov, Elvira Shokova, Valeri I. Kovalenko, L.I. Potapova, Vladimir Kovalev, Ivan Vatsouro
Publikováno v:
Journal of Molecular Structure. 1248:131472
The IR spectra of calix[6]arenes with adamantylacetic acid (1) and adamantyl (2) substituents along the upper rim of the molecule were studied. It was shown that the formation of an intramolecular H-bond between carboxyl groups on the upper rim of th
Autor:
Jung Keun Kim, Elvira Shokova, Ming Gong, Vladimir Kovalev, Olga V Kovaleva, Viktor A. Tafeenko, Yangjie Wu
Publikováno v:
Organicbiomolecular chemistry. 18(29)
A rapid and efficient method for 'one-pot' synthesis of pyrazoles from (hetero)arenes and carboxylic acids via successive formation of ketones and β-diketones followed by heterocyclization with hydrazine has been developed. The utility of the RCOOH/