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Solvent‐free synthesis of compounds containing chromene core catalyzed by novel Brønsted acidic ionic liquids ‐ClO 4
Author(s) -
Taib Layla A.,
Keshavarz Mosadegh,
Parhami Abolfath
Publication year - 2021
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.202000449
Subject(s) - chemistry , catalysis , ionic liquid , ionic bonding , core (optical fiber) , solvent , combinatorial chemistry , organic chemistry , ion , materials science , composite material
A series of novel sulfonic acid‐functionalized Brønsted acidic ionic liquids (BAILs) with perchlorate counter anion are introduced. These ionic liquid catalysts were prepared through simple and eco‐friendly procedures in high yields. Various analytical techniques such as Fourier transform infrared, 1 H and 13 C NMR, electro‐spray ionization mass spectrometry, elemental analysis (CHNS), and thermogravimetric techniques were used for well characterization of these catalysts. Next, the prepared BAILs were applied as efficient catalysts with high yields under solvent‐free conditions for the synthesis of chromenes. The proposed method offers several superiorities, such as high yields, decreased reaction times, cleaner reactions, and the lack of laborious workup or purification procedures. The simplicity in operation, applicability, and feasibility of this protocol for diverse substrates makes it an efficient alternative to conventional methods.