Hyperactive Magnetically Separable Nano-sized MgFe2O4 Catalyst for the Synthesis of Several Five- and Six-Membered Heterocycles

dc.citation.epage169
dc.citation.issue2
dc.citation.spage163
dc.contributor.affiliationGLA University
dc.contributor.authorBansal, Shobha
dc.contributor.authorKumar, Yogendra
dc.contributor.authorDas, Dipak Kumar
dc.contributor.authorSingh, Prabal Pratap
dc.coverage.placenameЛьвів
dc.coverage.placenameLviv
dc.date.accessioned2020-03-02T12:28:14Z
dc.date.available2020-03-02T12:28:14Z
dc.date.created2019-02-28
dc.date.issued2019-02-28
dc.description.abstractЗ використанням чистого нітрату заліза та карбонату магнію методом горіння синтезовано наночастки фериту MgFe2O4. Виявлено, що магніто-сепарабельний MgFe2O4 є гіперактивним каталізатором для синтезу широ- кого спектру біологічно активних п'яти та шестичленних гетероциклічних компонентів за умов дефлегмації. Встанов- лено, що вихід сполук є високим, а час реакції найменшим у порівнянні з літературними даними. Сильний електронний натяг Fe3+ відповідає за гіперактивність каталізатора, що було доведено заміщенням Fe3+ іншими тривалентними йонами металів. Показано, що заміна Mg2+ негативно впливає на каталітичну активність. За допомогою розробленої методики синтезовано ряд заміщених моно/біспіримідинів, піримідин-2- ол, піримiдин-2-тіол, піразоли та ізоксазоли внаслідок конденсації монохалконів/1,4-бісхалконів з різними біс- нуклеофілами у присутності гетерогенних магнітних наночастинок MgFe2O4 як каталізатора. Структуру синтезованих сполук визначено за допомогою спектроскопії Фур‘є, 1H, 13С та мас-спектроскопії. Каталізатор можна легко видалити з реакційної суміші за допомогою простого зовнішнього магніту. Показано можливість відновлення та повторного використання наночастинок фериту без помітної зміни в активності навіть після п'яти циклів. Проведено аналіз наночастинок за допомогою рентгено-дифракційного аналізу, трансмісійної електронної та ІЧ-спектроскопії.
dc.description.abstractMgFe2O4 nanoparticle ferrites were synthesized by combustion technique using pure ferric nitrate and magnesium carbonate. The magnetically separable MgFe2O4 MNP’s were found to be hyper active catalyst for the synthesis of a wide range of biologically active five and six-membered heterocyclic moieties at refluxing conditions. Reaction times are lowest in comparison to all reported in literature with excellent yields. Strong electron pull of Fe3+ is responsible for its hyper activity, which has been substantiated by substitution of Fe3+ by other trivalent metal ions. Mg2+ has a unique role because replacement of Mg2+ has poor catalytic activity. The developed protocol has been efficiently utilized for the synthesis of a series of substituted mono/bis pyrimidines, pyrimidin-2-ol, pyrimidin-2-thiol, pyrazoles and isoxazoles by condensing monochalcones/1,4-bischalcones with various bis-nucleophiles in the presence of catalytic amount of heterogenous magnetic MgFe2O4 nanoparticles. The structure of these synthesized compounds was determined by FTIR, 1H, 13C and mass spectra. The catalyst can be removed easily from reaction mixture by using a simple external magnet. Nanoparticles of ferrite were recovered and reused with no appreciable change in the activity even after the five runs. Nanoparticles are characterized by XRD, TEMand IR spectroscopy.
dc.format.extent163-169
dc.format.pages7
dc.identifier.citationHyperactive Magnetically Separable Nano-sized MgFe2O4 Catalyst for the Synthesis of Several Five- and Six-Membered Heterocycles / Shobha Bansal, Yogendra Kumar, Dipak Kumar Das, Prabal Pratap Singh // Chemistry & Chemical Technology. — Lviv : Lviv Politechnic Publishing House, 2019. — Vol 13. — No 2. — P. 163–169.
dc.identifier.citationenHyperactive Magnetically Separable Nano-sized MgFe2O4 Catalyst for the Synthesis of Several Five- and Six-Membered Heterocycles / Shobha Bansal, Yogendra Kumar, Dipak Kumar Das, Prabal Pratap Singh // Chemistry & Chemical Technology. — Lviv : Lviv Politechnic Publishing House, 2019. — Vol 13. — No 2. — P. 163–169.
dc.identifier.urihttps://ena.lpnu.ua/handle/ntb/46472
dc.language.isoen
dc.publisherВидавництво Львівської політехніки
dc.publisherLviv Politechnic Publishing House
dc.relation.ispartofChemistry & Chemical Technology, 2 (13), 2019
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dc.relation.urihttps://doi.org/10.1016/S0040-4020(00)00116-2
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dc.relation.urihttps://doi.org/10.1007/s00044-013-0877-9
dc.relation.urihttps://doi.org/10.1016/j.ejmech.2009.12.068
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dc.relation.urihttps://doi.org/10.1002/jhet.2615
dc.relation.urihttps://doi.org/10.1002/jhet.1046
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dc.rights.holder© Національний університет „Львівська політехніка“, 2019
dc.rights.holder© Bansal S., Kumar Y., Das D., Singh P., 2019
dc.subjectмагнітні наночастки MgFe2O4
dc.subjectмонохалкони
dc.subject1
dc.subject4-бісхалкони
dc.subjectпіримідин
dc.subjectпіразолін
dc.subjectізоксазолін
dc.subjectзовнішнє магнітне відділення
dc.subjectгетерогенний відновлювальний каталізатор
dc.subjectmagnetic MgFe2O4 nanoparticles
dc.subjectmono chalcones
dc.subject1
dc.subject4-bischalcones
dc.subjectpyrimidines
dc.subjectpyrazolines
dc.subjectisoxazolines
dc.subjectexternal magnetic separation
dc.subjectheterogeneous and reusable catalyst
dc.titleHyperactive Magnetically Separable Nano-sized MgFe2O4 Catalyst for the Synthesis of Several Five- and Six-Membered Heterocycles
dc.title.alternativeГіперактивний магніто-сепарабельний нано-каталізатор Mgfe2o4 для синтезу п‘яти- та шестичленних гетероциклічних сполук
dc.typeArticle

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