Zobrazeno 1 - 10
of 98
pro vyhledávání: '"L P, Olekhnovich"'
Publikováno v:
Russian Chemical Bulletin. 53:2071-2074
The reactions of 2-(2-aminophenyl)benzimidazole with substituted isatins afforded the corresponding 5,6-dihydrospiro(benz[4,5]imidazo[1,2-c]quinazoline-6,3′indolin)-2′-ones. The spirocyclic structure of the reaction products was established by NM
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3761d8bed898eec8418ec1a5604d09f7
https://doi.org/10.1007/s11172-005-0074-1
https://doi.org/10.1007/s11172-005-0074-1
Autor:
V. I. Simakov, Yu. A. Zhdanov, V. A. Voronina, D. N. Kuznetsov, L. P. Olekhnovich, Sergey V. Kurbatov
Publikováno v:
Russian Journal of General Chemistry. 74:731-737
Alkylation of o-(N-sulfonylamino)phenylimino derivatives of indol-2-one and cyclohepta[c]furan with phenacyl bromides is accompanied by cyclization to previously unknown tetrahydroquinoxalines having spiro-fused oxoindole and cyclohepta[c]furan fragm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94f6e60bd473b110b4db40f693e7561b
https://doi.org/10.1023/b:rugc.0000039087.49416.5e
https://doi.org/10.1023/b:rugc.0000039087.49416.5e
Autor:
Sergey V. Kurbatov, V. I. Simakov, Yu. A. Zhdanov, D. N. Kuznetsov, L. P. Olekhnovich, Leonid D. Popov
Publikováno v:
Russian Journal of General Chemistry. 73:1288-1292
Alkylation of N-benzylidene-N'-R-sulfonyl-o-phenylenediamines with phenacyl bromides is accompanied by diastereoselective cyclization to afford tetrahydroquinoxaline derivatives. No cyclization occurs in the alkylation of the same compounds with p-ni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f453bd8c3f60cd1e6a40ca8814f2c2d1
https://doi.org/10.1023/b:rugc.0000007659.30597.5c
https://doi.org/10.1023/b:rugc.0000007659.30597.5c
Publikováno v:
Russian Journal of General Chemistry. 72:1243-1247
Ab initio quantum-chemical calculations were used to examine the thermodynamic aspects of binding of molecular oxygen and the radical anion O2 ·- with certain amino acids. It was shown that amino acids form no stable systems with molecular oxygen bu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::090f53108383bd9f6e3d501018ab0dc6
https://doi.org/10.1023/a:1020879829706
https://doi.org/10.1023/a:1020879829706
Autor:
Vladimir A. Chistyakov, T. P. Shkurat, Yu. A. Zhdanov, V. N. Prokof'ev, Mikhail E. Kletskii, I. V. Kornienko, L. P. Olekhnovich, E. P. Gus'kov
Publikováno v:
Doklady Biochemistry and Biophysics. 383:105-108
In vertebrates, free purine bases are deaminated mainly to hypoxantine (Ia) or xantine (Ib), which are further oxidized to uric acid (Ic) in the presence of oxygen. Its further conversion (Ic to If) is shown in the following scheme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f4b8c82073ceb67af4f61923ee49921
https://doi.org/10.1023/a:1015331601169
https://doi.org/10.1023/a:1015331601169
Publikováno v:
Russian Journal of Organic Chemistry. 37:527-538
1,3-Diethoxy-2-R-5,5-R',R'-1-cyclohexenylium perchlorates in condensation with 2-hydroxyarylaldehydes under dehydration conditions give rise to 3-ethoxy-1,2-dihydroxanthylium perchlorates that with the second molecule of 2-hydroxyarylaldehyde afford
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a75307fa9b438a64fc0167d524330fd
https://doi.org/10.1023/a:1012433903229
https://doi.org/10.1023/a:1012433903229
Publikováno v:
Russian Chemical Bulletin. 50:1064-1067
Condensation of ortho-aminophenols and N-benzylsulfonyl-o-phenylenediamine with ninhydrin afforded tetracyclic products, the amino group entering into condensation with the carbonyl group at position 1 of ninhydrin. The structures of the reaction pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26173770d96afe08cc931bf4894f0b91
https://doi.org/10.1023/a:1011333722238
https://doi.org/10.1023/a:1011333722238
Autor:
L. P. Olekhnovich, Yu. A. Zhdanov, N. I. Vikrishchuk, Sergey V. Kurbatov, D. N. Kuznetsov, V. I. Simakov
Publikováno v:
Russian Journal of General Chemistry. 71:950-955
A new procedure was proposed for synthesis of quinoxaline derivatives by N-alkylation of 2,6-di-tert-butyl-4-(o-R-sulfonylaminophenylimino)-2,5-cyclohexadienones and subsequent intramolecular spirocyclization. A necessary condition for the reaction t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::320102ced9e71497c17a5e68b27eab33
https://doi.org/10.1023/a:1012399922502
https://doi.org/10.1023/a:1012399922502
Autor:
Yu. A. Zhdanov, A. E. Ruzhnikov, L. P. Olekhnovich, Sergey V. Kurbatov, N. I. Vikrishchuk, V. I. Simakov
Publikováno v:
Russian Journal of General Chemistry. 71:776-779
A new method was developed for synthesizing benzoxazine derivatives by O-alkylation of 2,6-di-tert-butyl-4-(o-hydroxyphenylimino)-2,5-cyclohexadienones with allyl or benzyl halides and subsequent thermal heterocyclization of allyl or benzyl ethers th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0689e82804e48ce80fedd53f0990e1f0
https://doi.org/10.1023/a:1012373722077
https://doi.org/10.1023/a:1012373722077
Autor:
O. Ya. Borbulevych, M. Yu. Antipin, A. E. Ruzhnikov, Sergey V. Kurbatov, L. P. Olekhnovich, A. V. Lesin
Publikováno v:
Russian Chemical Bulletin. 50:1264-1267
A new preparative procedure was developed for the synthesis of spiro-fused 1,4-benzothiazines by thermal heterocyclization of S-benzyl and S-phenacyl derivatives of o-indothiophenol.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a38b9302a969069d2acbdbc4bbc2bb72
https://doi.org/10.1023/a:1014019209635
https://doi.org/10.1023/a:1014019209635