Výsledky vyhledávání - "Alexander B. Shtarev"

Partially Bridge-Fluorinated Dimethyl Bicyclo[1.1.1]pentane-1,3-dicarboxylates: Preparation and NMR Spectra

Autor: Ivan Stibor, Michael D. Levin, Josef Michl, Evgueni Z. Pinkhassik, Alexander B. Shtarev

Publikováno v: Journal of the American Chemical Society. 123:3484-3492

Direct fluorination of dimethyl bicyclo[1.1.1]pentane-1,3-dicarboxylate, obtained from [1.1.1]propellane prepared by an improved synthetic procedure, furnished esters of 14 of the 15 possible bridge-fluorinated bicyclo[1.1.1]pentane-1,3-dicarboxylic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d62e787dc321e65b966520b4bb86b983
https://doi.org/10.1021/ja0000495

Zobrazit plný text záznamu

Absolute Rates of Intermolecular Carbon−Hydrogen Abstraction Reactions by Fluorinated Radicals

Autor: Feng Tian, Alexander B. Shtarev, William R. Dolbier, Jr.,† and, Bruce E. Smart

Publikováno v: Journal of the American Chemical Society. 121:7335-7341

Using competition kinetic methodology, absolute rate constants for bimolecular hydrogen abstraction from a variety of organic substrates in solution have been obtained for the n-C4H9CF2CF2•, n-C4F9...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c19297838ad0c0015a1573673ce938b6
https://doi.org/10.1021/ja990521q

Zobrazit plný text záznamu

Rates of 1,5-Hydrogen Abstraction in 1,1,2,2-Tetrafluoro-n-pentyl and 1,1,2,2,3,3-Hexafluoro-n-pentyl Radicals

Autor: Alexander B. Shtarev, William R. Dolbier, Jr.,† and, Bruce E. Smart

Publikováno v: Journal of the American Chemical Society. 121:2110-2114

A new competitive kinetic method to obtain the relative rates of intramolecular hydrogen abstraction versus intermolecular deuterium abstraction has been developed and used to measure the rates of the relatively slow unimolecular 1,5-hydrogen abstrac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bfe46a837cdb63971b8995cfc17dc96c
https://doi.org/10.1021/ja9830344

Zobrazit plný text záznamu

Reactivity of perfluoro-n-alkyl radicals with reluctant substrates. Rates of addition to RFCH2CH=CH2 and RFCH=CH2

Autor: Alexander B. Shtarev, Bruno Delest, William R. Dolbier

Publikováno v: Tetrahedron. 54:9273-9280

Conditions for conducting competitive experiments involving slow reactions of perfluoroalkyl radicals have been defined. A revised value for the rate constant for hydrogen abstraction from Et3SiH is reported [(5.0±0.4) × 105 M−1s−1], as are the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::21ecfc5c760ded5dac9541f8982c7618
https://doi.org/10.1016/s0040-4020(98)00568-7

Zobrazit plný text záznamu

Preparation, Structure, and Properties of Symmetrically 1,3-Difunctionalized Penta- and Hexafluorobicyclo[1.1.1]pentanes

Autor: Richard A. Newmark, Alexander B. Shtarev, Galina A. Levina, George G. I. Moore, Piotr Kaszynski, Martin E. Ashley, Michael D. Levin, Steven J. Hamrock, Bruce C. Noll, Josef Michl

Publikováno v: Journal of the American Chemical Society. 119:12750-12761

Exhaustive direct fluorination of dimethyl bicyclo[1.1.1]pentane-1,3-dicarboxylate leads to dimethyl pentafluorobicyclo[1.1.1]pentane-1,3-dicarboxylate (2) and hexafluorobicyclo[1.1.1]pentane-1,3-d...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4e5d957c939e51afd3b6566f5694bc54
https://doi.org/10.1021/ja9710518

Zobrazit plný text záznamu

Synthesis of Conjugated F-Polyenes Containing Thienyl Ring Systems

Autor: Alexander B. Shtarev, Zdeněk Chvátal

Publikováno v: The Journal of Organic Chemistry. 62:5608-5614

Novel 1-substituted F-1,3-butadienes ThioAr−CFCFCFCF2, ThioAr = 2-thienyl and 2-benzo[b]thienyl, and symmetrically 1,4-disubstituted F-1,3-butadienes ThioAr-CFCFCFCF−ThioAr, ThioAr = 5-R‘-2-thienyl (R‘ = Me, SiMe3, CFCFCl), 3-thienyl, and 4-d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::60c8ba92680b7c8c9b706bdb041e09f9
https://doi.org/10.1021/jo962325x

Zobrazit plný text záznamu

1-Aryl-F-1,3-butadienes and Unsymmetrical α,ω-Diaryl-F-polyenes

Autor: Alexander B. Shtarev, Mikhail M. Kremlev, Zdenek Chvátal

Publikováno v: The Journal of Organic Chemistry. 62:3040-3045

Para-substituted 1-aryl-F-1,3-butadiene derivatives p-R-C6H4-CFCFCFCF2 (2a−g), where R = H, CH3, OCH3, OC6H11, N(CH3)2, Br, and CF3, have been prepared by reaction of appropriate arylmagnesium bromides with F-1,3-butadiene. 19F NMR chemical shifts

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::001c2d568c967721be63baeb49f2beca
https://doi.org/10.1021/jo960196e

Zobrazit plný text záznamu