Výsledky vyhledávání - "Sergey V. Shevyakov"

Natural products as templates for bioactive compound libraries: Part 2. Novel modifications of vasicine (peganine) core via efficient and regioselective generation of 3-lithiodeoxyvasicine and its stereoselective addition to aliphatic ketones

Autor: Dmitry V. Kravchenko, Olga I. Davydova, Sergey V. Shevyakov, Alexandre V. Ivachtchenko, Alex S. Kiselyov, Mikhail Krasavin

Publikováno v: Natural Product Research. 20:871-881

A general procedure for direct lithiation of deoxyvasicine was developed. 3-Lithiodeoxyvasicine intermediate was found to react with various aliphatic ketones providing derivatives of 3-(hydroxyalkyl)deoxyvasicine in good yields. Similar reaction wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::722e3529d8fe984c2d3c3b730907cef1
https://doi.org/10.1080/14786410500480993

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Natural products as templates for bioactive compound libraries: synthesis of biaryl derivatives of (±)-vasicine

Autor: Dmitry V. Kravchenko, Sergey V. Shevyakov, Sergey E. Tkachenko, Dmitry G. Pershin, Mikhail Krasavin, Olga I. Davydova, Alex S. Kiselyov, Alexandre V. Ivachtchenko

Publikováno v: Natural Product Research. 20:735-741

A reliable and high-yielding procedure for preparation of 7-aryl and 7-heteroaryl derivatives of (+/-)-vasicine in two steps from the naturally occurring material is described. This protocol broadens the chemical space for selective modifications of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89d1dd088750151535f478742dbd2ca6
https://doi.org/10.1080/14786410500247418

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Sequential Forward S2−S2 and Back S1−S1 (Cyclic) Energy Transfer in a Novel Azulene−Zinc Porphyrin Dyad

Autor: Marcin Ziolek, Edwin K. L. Yeow, Sergey V. Shevyakov, Ronald P. Steer, A. Maciejewski, Jerzy Karolczak, Alfred E. Asato

Publikováno v: The Journal of Physical Chemistry A. 108:10980-10988

A covalently tethered dyad containing the azulene (Az) and zinc tetraphenylporphyrin (ZnP) chromophores has been synthesized and its excited-state dynamics investigated, using the tether-substituted monochromophoric species as reference compounds. On

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::97676db41a6d7331aba50c2a1c508623
https://doi.org/10.1021/jp0465175

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Photoisomerization by Hula Twist: 2,2′-Dimethylstilbene and a Ring-Fused Analogue

Autor: Robert S. H. Liu, Takayuki Kuroda, Govindarajan Krishnamoorthy, Mikio Kataoka, Yasushi Imamoto, Sergey V. Shevyakov

Publikováno v: Angewandte Chemie International Edition. 42:3630-3633

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cb4bce19ca6a1ee1ead6335a1ca5715
https://doi.org/10.1002/anie.200351763

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Orbital Control of the Color and Excited State Properties of Formylated and Fluorinated Derivatives of Azulene

Autor: Alfred E. Asato, Sergey V. Shevyakov, Rajeev S. Muthyala, John C. Croney, David M. Jameson, Robert S. H. Liu, Hongru Li

Publikováno v: The Journal of Physical Chemistry A. 107:3295-3299

New azulene derivatives containing resonantly electron withdrawing formyl and resonantly electron donating fluorine substituents on the seven- as well as the five-member ring have been prepared. Systematic color changes as a result of perturbation of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::05a8d60a0eb39151dd53c96a75d1592e
https://doi.org/10.1021/jp021605f

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