Zobrazeno 1 - 10 of 11 pro vyhledávání: '"Julianne. Fassberg"'
1
Hydrolysis of substituted .alpha.-nitrostilbenes: dissection of rate coefficients for individual steps in the four-step mechanism. Estimates of intrinsic rate constants and transition-state imbalances
Autor: Claude F. Bernasconi, Julianne Fassberg
Publikováno v: Journal of the American Chemical Society. 116:514-522
A kinetic study of the hydrolysis of substituted α-nitrostilbenes (NS-Z with Z=4-Me, H, 4-Br, 3-NO 2 , and 4-NO 2 ) in 50% Me 2 SO-50% water (v/v) at 20 o C is reported. The mechanism consists of four steps: nucleophilic addition to NS-Z of water (k
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5303d7fae5ac7510cada84c8b81d192e
https://doi.org/10.1021/ja00081a011
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3
A kinetic and Mechanistic Study of the Hydrolysis of Camptothecin and Some Analogues
Autor: Valentino J. Stella, Julianne Fassberg
Publikováno v: Journal of Pharmaceutical Sciences. 81:676-684
Quantitative rate and equilibrium constants for the hydrolysis of the lactone (ring E) in camptothecin (1) and analogues (2-5, all substituted in the A ring of 1) at 25 degrees C in aqueous solution were determined by high-performance liquid chromato
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b341c5da8d1ac619d970bfece90ed0c
https://doi.org/10.1002/jps.2600810718
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4
Kinetics of reactions of hydroxide ion and water with .beta.-X-substituted .alpha.-nitrostilbenes (X = Cl, I, SEt, OMe, SCH2CH2OH) in 50% Me2SO-50% water. Search for the intermediate in nucleophilic vinylic substitution
Autor: Zvi Rappoport, Robert B. Killion, Claude F. Bernasconi, David F. Schuck, Julianne Fassberg
Publikováno v: Journal of the American Chemical Society. 113:4937-4946
The hydrolysis of Ph(LG)C=CPh(NO 2 ) (4-LG, LG=Cl, I, SEt, OMe) in basic solution yields the anion of 1,2-diphenyl-2-nitroethanone, PhC(=O)C(=NO 2 − )Ph, by the addition-elimination mechanism of nucleophilic vinylic substitution, while the reaction
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aef0a196a315b51b3363479581bfc1f0
https://doi.org/10.1021/ja00013a033
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6
Kinetics of reactions of thiolate ions with .alpha.-nitro .beta.-substituted stilbenes in 50% Me2SO-50% water. Observation of the intermediate in nucleophilic vinylic substitution reactions
Autor: Zvi Rappoport, Robert B. Killion, Claude F. Bernasconi, Julianne Fassberg
Publikováno v: Journal of the American Chemical Society. 112:3169-3177
Cinetique des reactions du type Ph(GD)C=CPh(NO 2 )+RS − →Ph(RS)C=CPh(NO 2 )+GD − : GD=I, Cl, 4-CH 3 C 6 H 4 O, CH 3 O, CH 3 O 2 CCH 2 CH 2 S, et CH 3 CH 2 CH 2 S avec RS − =HOCH 2 CH 2 S − ; GD=CH 3 O avec RS − =EtS − , CH 3 O 2 CCH 2 C
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb070a98997dc97d2de30a67437ec57a
https://doi.org/10.1021/ja00164a045
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