Search Results - "Tishkov, Alexander A."

Nucleophilicity Parameters for Alkyl and Aryl Isocyanides by Tumanov, Vasily V., Tishkov, Alexander A., Mayr, Herbert

“…How nucleophilic are isocyanides? The kinetics of the reactions of alkyl and aryl isocyanides with benzhydrylium ions indicate that isocyanides are 10 orders…”
Get full text

Direct Observation of the Ionization Step in Solvolysis Reactions:  Electrophilicity versus Electrofugality of Carbocations by Schaller, Heike F, Tishkov, Alexander A, Feng, Xinliang, Mayr, Herbert

“…Rates and equilibria of the reactions of highly stabilized amino-substituted benzhydrylium ions (Ar2CH+) with carboxylate ions have been determined…”
Get full text

Ambident Reactivity of the Cyanide Ion: A Failure of the HSAB Principle by Tishkov, Alexander A., Mayr, Herbert

“…Diffusion or activation control: Free CN− ions are generally alkylated at carbon (see picture). N‐attack is only observable in diffusion controlled reactions…”
Get full text

Structure and Stereodynamics of N,N-Bis(silyloxy)enamines by Tishkov, Alexander A, Dilman, Alexander D, Faustov, Valery I, Birukov, Arsenij A, Lysenko, Konstantin S, Belyakov, Paul A, Ioffe, Sema L, Strelenko, Yury A, Antipin, Michael Yu

“…The structure and stereodynamics of N,N-bis(silyloxy)enamines (1), a new class of enamines with extraordinary reactivity, have been simulated by the DFT…”
Get full text

Ambident Reactivity of the Nitrite Ion Revisited by Tishkov, Alexander A., Schmidhammer, Uli, Roth, Stefan, Riedle, Eberhard, Mayr, Herbert

“…Lost control: The rationalization of the ambident reactivity of NO2− by the change between charge control to orbital control has to be revised. SN1‐type…”
Get full text

New C−C Coupling Reaction of Cyclic Nitronates with Carbon Nucleophiles. Umpolung of the Conventional Reactivity of Nitronates by Smirnov, Vladimir O, Ioffe, Sema L, Tishkov, Alexander A, Khomutova, Yulia A, Nesterov, Ivan D, Antipin, Michael Yu, Smit, William A, Tartakovsky, Vladimir A

“…Cyclic six-membered nitronates 1 are involved in diastereoselective C−C coupling reactions with various nucleophiles in the presence of either catalytic or…”
Get full text

2-Silyloxy-1,2-oxazines, a New Type of Acetals of Conjugated Nitroso Alkenes by Tishkov, Alexander A, Lesiv, Alexey V, Khomutova, Yulya A, Strelenko, Yury A, Nesterov, Ivan D, Antipin, Michael Yu, Ioffe, Sema L, Denmark, Scott E

“…3-Alkyl-substituted 1,2-oxazine N-oxides 2 can be selectively transformed into 2-silyloxy-1,2-oxazines 1 upon treatment with silylating reagents. In the solid…”
Get full text

Chemistry of β-Functionalized α-Nitroso Ethylenes. Methyl β-Nitroso Acrylate as Heterodienophile in [4 + 2]- Cycloaddition to Cyclic Dienes by Tishkov, Alexander A, Lyapkalo, Il'ya M, Ioffe, Sema L, Strelenko, Yuri A, Tartakovsky, Vladimir A

“…β-Functionalized nitroso alkene 2, obtained from methyl β-nitropropionate 1 and N,O-bis(trimethylsilyl)acetamide, can function as a good heterodienophile in…”
Get full text

Novel Me3Si-Mediated Intramolecular Cyclisation/[4 + 2] Cyclofragmentation of β-Substituted γ-Nitro Ketones by Tishkov, Alexander A., Lyapkalo, Il'ya M., Kozincev, Anton V., Ioffe, Sema L., Strelenko, Yuri A., Tartakovsky, Vladimir A.

“…5‐Nitro‐4‐phenylpentan‐2‐one (1) was found to undergo hitherto unknown Me3SiBr/Et3N‐promoted cyclisation into the intermediate six‐membered cyclic nitronate 5…”
Get full text

Me3SiBr-mediated intramolecular cyclization of γ-functionalized trimethylsilyl nitronates by Tishkov, Alexander A, Kozintsev, Anton V, Lyapkalo, Il'ya M, Ioffe, Sema L, Kachala, Vadim V, Strelenko, Yuri A, Tartakovsky, Vladimir A

“…The silylation of nitro compounds of general formula X1X2CHCH(Ar)CH2NO2 with Me3SiBrEt3N at −30°C leads to hitherto unknown…”
Get full text

Die ambidente Reaktivität des Cyanid‐Ions: ein Versagen des HSAB‐Prinzips by Tishkov, Alexander A., Mayr, Herbert

“…Diffusions‐ oder Aktivierungskontrolle: Freie CN−‐Ionen werden generell am Kohlenstoff alkyliert. Nur bei diffusionskontrollierten Reaktionen mit Carbokationen…”
Get full text

Nucleophilie‐Parameter von Alkyl‐ und Arylisocyaniden by Tumanov, Vasily V., Tishkov, Alexander A., Mayr, Herbert

“…Wie nucleophil sind Isocyanide? Die Kinetik der Reaktionen von Alkyl‐ und Arylisocyaniden mit Benzhydrylium‐Ionen zeigt, dass Isocyanide um zehn…”
Get full text

The exhaustive silylation of 5-nitro-pentan-2-one: novel processes and opportunities by Tishkov, Alexander A., Lyapkalo, Il'ya M., Ioffe, Sema L., Strelenko, Yuri A., Tartakovsky, Vladimir A.

Get full text

Die ambidente Reaktivität des Cyanid-Ions: ein Versagen des HSAB-Prinzips by Tishkov, Alexander A., Mayr, Herbert

Get full text

β,β′-functionalized N, N-divinyl- N-trimethylsilyloxyamines via silylation of β-substituted aliphatic nitro compounds. The investigation of the mechanism of the process using selective trapping reagents by Ioffe, Sema L., Lyapkalo, Il'ya M., Tishkov, Alexander A., Danilenko, Vitaliy M., Strelenko, Yuri A., Tartakovsky, Vladimir A.

“…Hitherto unknown N, N-divinyl- N-trimethylsilyloxyamines of the general formula [XC(R)=ch] 2NOSiMe 3 (X = CO 2Me. CN. 5-methyloxycarbonylisoxazolin-3-yl; R =…”
Get full text

Nucleophilie-Parameter von Alkyl- und Arylisocyaniden by Tumanov, Vasily V., Tishkov, Alexander A., Mayr, Herbert

Get full text

2-Silyloxy-1,2-oxazines, a new type of acetals of conjugated nitroso alkenes by TISHKOV, Alexander A, LESIV, Alexey V, KHOMUTOVA, Yulya A, STRELENKO, Yury A, NESTEROV, Ivan D, ANTIPIN, Michael Yu, IOFFE, Sema L, DENMARK, Scott E

Get full text

Structure and stereodynamics of N, N-bis(silyloxy)enamines by TISHKOV, Alexander A, DILMAN, Alexander D, FAUSTOV, Valery I, BIRUKOV, Arsenij A, LYSENKO, Konstantin S, BELYAKOV, Paul A, IOFFE, Sema L, STRELENKO, Yury A, ANTIPIN, Michael Yu

Get full text

New reaction of cyclic nitronates: C,C-cross coupling with silyl enolates by Smirnov, Vladimir O., Tishkov, Alexander A., Ioffe, Sema L., Zatonsky, Georgy V., Strelenko, Yurii A., Smit, William A.

“…The interaction of cyclic nitronate esters with silyl enolates in the presence of trimethylsilyl triflate leads to the formation of five membered heterocycles,…”
Get full text

Die ambidente Reaktivität von Nitrit‐Ionen neu aufgerollt by Tishkov, Alexander A., Schmidhammer, Uli, Roth, Stefan, Riedle, Eberhard, Mayr, Herbert

“…Die Deutung der ambidenten Reaktivität von NO2− durch den Wechsel von Ladungs‐ zu Orbital‐Kontrolle muss revidiert werden. Bei SN1‐Reaktionen von Carbokationen…”
Get full text