Temat: heterocycles - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Thermal [3+2] cycloaddition reactions as most universal way for the effective preparation of five-membered nitrogen containing heterocycles
Autorzy:: Kras, Jowita
Sadowski, Mikołaj
Zawadzińska, Karolina
Nagatsky, Roman
Woliński, Przemysław
Kula, Karolina
Łapczuk, Agnieszka
Powiązania:: https://bibliotekanauki.pl/articles/35141032.pdf
Data publikacji:: 2023
Wydawca:: Radomskie Towarzystwo Naukowe
Tematy:: [3+2] cycloaddition
five-membered heterocycles
regioselectivity
stereoselectivity
[3+2] cykloaddycja
heterocykle pięcioczłonowe
regioselektywność
stereoselektywność
Opis:: The possibility of the construction of five-membered heterocycles, including single heteroatom or systems with two, three and four heteroatoms were critically reviewed based on the recent reports regarding to the [3+2] cycloaddition reactions. Almost all of analysed reaction are realized with high regio- and stereoselectivity.
Źródło:: Scientiae Radices; 2023, 2, 3; 247-267
2956-4808
Pojawia się w:: Scientiae Radices
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Preparation and Characterization of 1-(5-Azido-1H-1,2,4-triazol-3-yl)tetrazole
Autorzy:: Izsák, D.
Klapötke, T. M.
Powiązania:: https://bibliotekanauki.pl/articles/358367.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: energetic materials
heterocycles
triazoles
tetrazoles
azides
Opis:: This study presents the preparation of 1-(5-azido-1H-1,2,4-triazol-3yl)tetrazole (5) from commercially available chemicals in a five step synthesis. The energetic title compound was comprehensively characterized by various means, including vibrational (IR, Raman) and multinuclear (1H, 13C, 14N, 15N) NMR spectroscopy, mass spectrometry and differential scanning calorimetry. The sensitivities towards various outer stimuli (impact, friction) were determined according to BAM standards. The enthalpy of formation was calculated at the CBS-4M level of theory.
Źródło:: Central European Journal of Energetic Materials; 2015, 12, 3; 403-416
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: 5-Aminotetrazoles and Silver-based Primary Explosives
Autorzy:: Delalu, H.
Karaghiosoff, K.
Klapötke, T. M.
Miró Sabaté, C.
Powiązania:: https://bibliotekanauki.pl/articles/358016.pdf
Data publikacji:: 2010
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: silver
nitrogen-heterocycles
primary explosives
BAM tests
Opis:: Several silver nitrate and perchlorate salts with 5-aminotetrazole-based ligands have been synthesized and characterized by elemental analysis, mass spectrometry, IR, Raman and multinuclear NMR spectroscopy. In addition, several of the new compounds were characterized by X-ray structure analysis. The energetic properties of the materials were assessed by differential scanning calorimetry (DSC) analysis in combination with standard impact and friction BAM tests. The compounds synthesized have good thermal stabilities above 225 C and in some instances the high sensitivities of the materials towards impact and friction make them fall under the category of primary explosives. Some of the compounds might present prospective use in initiation devices for civil and military applications.
Źródło:: Central European Journal of Energetic Materials; 2010, 7, 3; 197-216
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Anion alkoksyallenowy w syntezie związków naturalnych i ich analogów
Alkoxyallene anion in the synthesis of natural products and their analogues
Autorzy:: Busiak, B.
Utecht, G.
Jasiński, M.
Powiązania:: https://bibliotekanauki.pl/articles/172377.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: alkoksyalleny
addycja nukleofilowa
synteza organiczna
związki naturalne
związki heterocykliczne
alkoxyallenes
nucleophilic addition
organic synthesis
natural products
heterocycles
Opis:: Among diverse systems containing multiple bonds, cumulenes are recognized as the most reactive derivatives towards both nucleophilic and electrophilic agents, and for this reason, they are considered as important class of substrates for organic synthesis. Over the last three decades alkoxyallenes have been demonstrated as highly useful C₃-building blocks for the construction of numerous N-, O-, and S-containing heterocycles, including enantiomerically pure compounds. Special attention has been paid to lithiated alkoxyallenes as suitable nucleophiles for the reactions with alkyl halides, strained heterocycles, carbonyl compounds and their derivatives. The presence of the allene unit in the initially formed adducts opens up several possibilities in the preparation of more complex systems. In this review, selected applications of lithiated alkoxyallenes in the synthesis of natural products and their analogues are discussed.
Źródło:: Wiadomości Chemiczne; 2016, 70, 1-2; 3-23
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "heterocycles" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język