Green novel multicomponent synthesis and biological evaluation of new oxazolopyrazoloazepines and reduction of nitrophenols in the presence of Ag/Fe3O4/ZnO@MWCNT MNCs

Savari, Mehdi; Varasteh-Moradi, Ali; Sayyed-Alangi, S. Zahra; Hossaini, Zinatossadat; Mehrabian, Ramin Zafar

doi:10.1007/s11030-022-10390-z

Cited by 4 publications

(2 citation statements)

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“…(95), and ethyl bromopyruvate (96) (Scheme 29). 86 The ILs, as stabilizers and soft templates, were found to be reusable up to six cycles. Katariya and co-workers have developed a protocol for the 1-ethyl-3-methylimidazolium acetate [Emim][Ac]-catalyzed synthetic construction of pyrano[3,2-c]chromen-5ones 99 in moderate to excellent yields from 4-hydroxycoumarin (53), aldehydes 87 and (E)-N-methyl-1-(methylthio)-2-nitriethenamine (98) under solvent-free conditions (Scheme 30).…”

Section: Scheme 24mentioning

confidence: 97%

“…Savari et al evaluated the catalytic performance of Ag/Fe 3 O 4 /ZnO@MWCNT MNCs and imidazolium-based ILs at room temperature for the synthesis of novel anti-oxidant oxazolopyrazoloazepines 97 using anilines 91 , activated acetylenes 92 , alkyl bromides 93 , hydrazine ( 94 ), oxalyl chloride ( 95 ), and ethyl bromopyruvate ( 96 ) (Scheme 29 ). 86 The ILs, as stabilizers and soft templates, were found to be reusable up to six cycles.…”

Section: Construction Of Heterocycles Catalyzed By Ionic Liquidsmentioning

confidence: 97%

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The Synthesis of Nitrogen- and Oxygen-Containing Heterocyclic Scaffolds Assisted by Ionic Liquids: A 2022 Literature Survey

Dhameliya,

Raghani,

Desai

et al. 2023

Synlett

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Heterocycles have gained recognition as vital components in approved drugs, drawing substantial attention from the scientific community. Ionic liquids (ILs) have been utilized for their transformative role in heterocycle synthesis, showcasing distinctive properties that are pivotal in diverse chemical transformations, while also acting as effective catalysts and offering safer alternatives to volatile organic solvents. This review delves into the synthesis of nitrogen- and oxygen-containing heterocyclic structures, employing various ILs such as ammonium, cholinium, DABCO-based, DBU-based, guanidinium, imidazolium, phosphonium, pyridinium, and miscellaneous. They have proven indispensable in facilitating reactions like Fischer-indole synthesis, Biginelli, Knoevenagel condensations and many more. Notably, the recyclability of ILs serves as a valuable asset, aiding in the completion of intricate synthetic pathways, multicomponent reactions, and one-pot syntheses, ultimately enhancing yields. This review seeks to guide researchers in selecting suitable ILs for specific chemical reactions, enabling the synthesis of aza- and/ or oxa-heterocycles described in 2022. This advancement holds promising prospects for drug development and other applications within the domain of heterocyclic chemistry.

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Section: Scheme 24mentioning

confidence: 97%

Section: Construction Of Heterocycles Catalyzed By Ionic Liquidsmentioning

confidence: 97%