Slovak
Albanian
Arabic
Armenian
Azerbaijani
Belarusian
Bengali
Bosnian
Catalan
Czech
Danish
Deutsch
Dutch
English
Estonian
Finnish
Français
Greek
Haitian Creole
Hebrew
Hindi
Hungarian
Icelandic
Indonesian
Irish
Italian
Japanese
Korean
Latvian
Lithuanian
Macedonian
Mongolian
Norwegian
Persian
Polish
Portuguese
Romanian
Russian
Serbian
Slovak
Slovenian
Spanish
Swahili
Swedish
Turkish
Ukrainian
Vietnamese
Български
中文(简体)
中文(繁體)

cinchona pubescens/močovina

Odkaz sa uloží do schránky
ČlánkyKlinické štúdiePatenty
8 výsledky
Two novel diastereomeric cinchona-calixarene hybrid-type receptors (SOs) were synthesized by inter-linking 9-amino(9-deoxy)-quinine (AQN)/9-amino(9-deoxy)-epiquinine (eAQN) and a calix[4]arene scaffold via an urea functional unit. Silica-supported chiral stationary phases (CSPs) derived from these

Mechanistic investigations into the enantioselective Conia-ene reaction catalyzed by cinchona-derived amino urea pre-catalysts and Cu(I).

Články môžu prekladať iba registrovaní používatelia
Prihlásiť Registrácia
The enantioselective Conia-ene cyclization of alkyne-tethered β-ketoesters is efficiently catalyzed by the combination of cinchona-derived amino-urea pre-catalysts and copper(I) salts. The reaction scope is broad and a series of substrates can be efficiently cyclized with high yields and

A new class of urea-substituted cinchona alkaloids promote highly enantioselective nitroaldol reactions of trifluoromethylketones.

Články môžu prekladať iba registrovaní používatelia
Prihlásiť Registrácia
The first class of bifunctional cinchona-alkaloid catalysts incorporating a urea moiety at C-5' has been developed. These materials catalyze the efficient and highly enantioselective 1,2-addition of nitromethane to trifluoromethylketones to form synthetically pliable products incorporating a

Asymmetric catalysis with bifunctional cinchona alkaloid-based urea and thiourea organocatalysts.

Články môžu prekladať iba registrovaní používatelia
Prihlásiť Registrácia
Cinchona alkaloid derivatives modified to include a (thio)urea component have emerged in the last three years as readily accessible, robust and tunable bifunctional organocatalysts for a range of synthetically useful transformations. The origins of these catalysts and the major developments in their

Cinchona Urea-Catalyzed Asymmetric Sulfa-Michael Reactions: The Brønsted Acid-Hydrogen Bonding Model.

Články môžu prekladať iba registrovaní používatelia
Prihlásiť Registrácia
The cinchona alkaloid-derived urea-catalyzed asymmetric conjugate addition of aromatic thiols to cycloalkenones was studied using density functional theory (DFT). Deprotonation of the thiol gives a protonated amine that activates the electrophile by Brønsted acid catalysis, while the urea group

Cinchona Alkaloid Catalyzed Sulfa-Michael Addition Reactions Leading to Enantiopure β-Functionalized Cysteines.

Články môžu prekladať iba registrovaní používatelia
Prihlásiť Registrácia
Sulfa-Michael additions to α,β-unsaturated N-acylated oxazolidin-2-ones and related α,β-unsaturated α-amino acid derivatives have been enantioselectively catalyzed by Cinchona alkaloids functionalized with a hydrogen bond donating group at the C6' position. The series of Cinchona alkaloids includes

Cinchona Alkaloid-Squaramide Catalyzed Sulfa-Michael Addition Reaction: Mode of Bifunctional Activation and Origin of Stereoinduction.

Články môžu prekladať iba registrovaní používatelia
Prihlásiť Registrácia
The mechanism of the enantioselective sulfa-Michael addition reaction catalyzed by a cinchona alkaloid-squaramide bifunctional organocatalyst was studied using density functional theory (DFT). Four possible modes of dual activation mechanism via hydrogen bonds were considered. Our study showed that
Pripojte sa k našej
facebookovej stránke

Najkompletnejšia databáza liečivých bylín podporovaná vedou

  • Pracuje v 55 jazykoch
  • Bylinné lieky podporené vedou
  • Rozpoznávanie bylín podľa obrázka
  • Interaktívna GPS mapa - označte byliny na mieste (už čoskoro)
  • Prečítajte si vedecké publikácie týkajúce sa vášho hľadania
  • Vyhľadajte liečivé byliny podľa ich účinkov
  • Usporiadajte svoje záujmy a držte krok s novinkami, klinickými skúškami a patentmi

Zadajte príznak alebo chorobu a prečítajte si o bylinách, ktoré by vám mohli pomôcť, napíšte bylinu a pozrite sa na choroby a príznaky, proti ktorým sa používa.
* Všetky informácie sú založené na publikovanom vedeckom výskume

Google Play badgeApp Store badge