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Search results for: cycloaddition
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Katedry Chemii Organicznej
Research PotentialSynteza nowych związków organicznych w szczególności posiadających aktywność biologiczną. Opracowywanie i sprawdzanie w praktyce nowych metod syntezy związków organicznych. Inżynieria kryształów oraz zastosowanie dichroizmu kołowego. Badanie czynności optycznej związków konfiguracyjnie labilnych.
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Katedra Technologii Polimerów
Research PotentialW Katedrze Technologii Polimerów realizowane są prace badawczo-wdrożeniowe, wykonywane ekspertyzy i analizy oraz prowadzone są szkolenia w zakresie technologii polimerów oraz przetwórstwa i recyklingu tworzyw sztucznych. Oferujemy nowe technologie i przeprowadzamy modyfikacje technologii już istniejących.
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Katedra chemii, technologii i biotechnologii żywności
Research Potential* Biochemiczne i funkcjonalne właściwości składników żywności oraz ich chemiczne i enzymatyczne modyfikacje * Łagodne przetwarzanie żywności * Bezpieczeństwo zdrowotne żywności * Analiza żywności * Reologia żywności * Związki aktywne biologicznie pochodzenia roślinnego
Other results Pokaż wszystkie wyniki (19)
Search results for: cycloaddition
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Preparation of bicyclic β-lactam and bicyclic 1,3- oxazinone scaffolds using combined cycloaddition and metathesis processes
PublicationA simple, efficient two-step method for the preparation of heterobicyclic compounds was developed. Starting from 5-acyl or 5-carbamoyl-2,2- dimethyl-1,3-dioxa-4,5-dione bicyclic scaffolds of 1-azabicyclo[5.2.0]non- 3-en-9-one, 6,9,10,10a-tetrahydro-4H-[1,3]oxazino[3,2-a]azepin-4-one, and 6,9,10,10a-tetrahydro-2H-[1,3]oxazino[3,2-a]azepine-2,4(3H)-dione were prepared using cycloaddition of thermally generated ketenes to aldimines...
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A Novel [4+2] Cycloaddition Reaction Involving Lawesson’s Reagent. Structure and Specific Fragmentations of a New Cyclic 1,2-Thiaphosphinane-4-one
PublicationA crude morpholine enamine of acetone treated with Lawesson’s reagent unexpectedly yielded a six-membered thiaphosphinane-4-one. This compound is the first example of a new class of heterocycles. It has been proven that it is formed from 4-methyl-2-morpholino-1,3-pentadiene which is usually present in crude morpholine enamine batches. A mechanism of this regioselective reaction was postulated and a characteristic chair-like conformation...
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Thermal Decomposition of Carbamoyl Meldrum’s Acids: A Starting Point for the Preparation of 1,3-Oxazine Derivatives
PublicationThe ability to undergo [4 + 2] versus [2 + 2] cycloaddition was under investigation for ketenes thermally generated from carbamoyl Meldrum’s acid. Usually, 1,3-oxazino-5-carbamoylo-4,6-diones are formed when carbamoyl Meldrum’s acid reacts with imine. However, in some cases, a reaction takes an unexpected course, leading to the formation of tetraponerines alkaloids derivatives or cyclic iminoethers.
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Convenient Synthesis of Functionalized Unsymmetrical Vinyl Disulfides and Their Inverse Electron-Demand Hetero-Diels-Alder Reaction
PublicationThe simple, convenient, and efficient methods for the preparation of unsymmetrical vinyl disulfides with additional functional groups under mild conditions with moderate to high yields were designed. The developed methods include the reaction of S-vinyl phosphorodithioate with thiotosylates or S-vinyl thiotosylate with thiols. The designed methods allow for the synthesis of unsymmetrical vinyl disulfides with additional functionalities...
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Efficient Method for the Synthesis of Functionalized Basic Maleimides
PublicationA three-step procedure involving Diels-Alder condensation of maleic anhydride with furane, formation of N-substituted imide upon reaction with appropriate diamine and a final retro Diels-Alder regeneration of the maleic carbon-carbon double bond is proposed for an unequivocal synthesis of N-substituted basic maleimides. The novel method is characterized by mild reaction conditions, easy work-up, high yields and no need for additional...