Res Chem Intermed (2015) 41:6477–6483 DOI 10.1007/s11164-014-1754-y Acidic ionic liquid N-methyl 2-pyrrolidonium hydrogen sulfate as an efﬁcient catalyst for the one-pot multicomponent preparation of 3,4,5-substituted furan- 2(5H)-ones • • Sajjad Salahi Malek Taher Maghsoodlou • • Nourallah Hazeri Fahimeh Movahedifar Razieh Doostmohammadi Mojtaba Lashkari Received: 16 April 2014 / Accepted: 19 June 2014 / Published online: 19 July 2014 Springer Science+Business Media Dordrecht 2014 Abstract We have developed an efﬁcient method for the synthesis of 3,4,5-substituted furan-2(5H)-ones via one-pot, three-component condensation reaction of aldehydes, amines, and dialkyl acetylenedicarboxylates using acidic ionic liquid catalyst (N-methyl 2-pyrrolidonium hydrogen sulfate ([H-NMP]HSO )). This reaction beneﬁts from simple, inexpensive, and straightforward procedure, an environmental friendly method, and high yields. Keywords N-methyl 2-Pyrrolidonium hydrogen sulfate ([H-NMP]HSO ) Ionic liquid Dialkyl acetylenedicarboxylates Aldehyde Furan-2(5H)-ones Introduction Ionic liquids (ILs) have attracted great attention among organic chemists as appropriate green solvents and catalysts in organic synthesis . ILs are categorized in a wide range such as acidic ILs, basic ILs, metal-containing ILs, guanidinium ILs, chiral-ILs, and ILs containing -OH groups . In particular, Brønsted acidic ILs, which act similar to Brønsted acids, are simply formed via acid–base and nucleophilic reactions. Several researches have
Research on Chemical Intermediates – Springer Journals
Published: Jul 19, 2014
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