2014
DOI: 10.1016/j.tetlet.2013.11.095
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Heterogeneous reusable catalyst, ultrasound energy, and no solvent: a quick and green recipe for one-pot synthesis of β-phosphonomalononitriles at room temperature

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Cited by 17 publications
(5 citation statements)
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“…In this scenario, the emergence of more ecologically viable synthetic methodologies to obtain these frameworks is desirable. Heteropolyacids (HPAs) are efficient catalysts in a series of chemical transformations [190] , [227] , [228] , [229] , [230] , and having that in mind, Dar et al ( Scheme 52 ) [231] have combined the properties of HPAs and clay - material with wide application in heterogeneous catalysis as solid supports [232] , [233] , [234] – in the development of a nanocatalyst (Nano-H 5 PV 2 W 10 O 40 ·10H 2 O/Clay) for the synthesis of β -phosphonomalononitriles ( 1 4 0 ). The MCR was carried out using benzaldehyde ( 1 ), malononitrile ( 9 ), and triethyl phosphite ( 1 3 9 ) under ultrasonication, at room temperature and solvent-free media.…”
Section: Ultrasound-assisted Mcrs Under Heterogeneous Catalysismentioning
confidence: 99%
“…In this scenario, the emergence of more ecologically viable synthetic methodologies to obtain these frameworks is desirable. Heteropolyacids (HPAs) are efficient catalysts in a series of chemical transformations [190] , [227] , [228] , [229] , [230] , and having that in mind, Dar et al ( Scheme 52 ) [231] have combined the properties of HPAs and clay - material with wide application in heterogeneous catalysis as solid supports [232] , [233] , [234] – in the development of a nanocatalyst (Nano-H 5 PV 2 W 10 O 40 ·10H 2 O/Clay) for the synthesis of β -phosphonomalononitriles ( 1 4 0 ). The MCR was carried out using benzaldehyde ( 1 ), malononitrile ( 9 ), and triethyl phosphite ( 1 3 9 ) under ultrasonication, at room temperature and solvent-free media.…”
Section: Ultrasound-assisted Mcrs Under Heterogeneous Catalysismentioning
confidence: 99%
“…The catalyst recovered and reused numerous times no noteworthy loss of its catalytic activity was observed (Scheme 31). [48] …”
Section: Synthesis Of β‐Phosphonomalonatesmentioning
confidence: 99%
“…The reaction could also be catalyzed by using a base, [108,109] Lewis acid, [110,111] microwave, [112] transition metals, [113,114] or radical inhibitors, [115,116] phosphomolybdic acid H 3 PMo 12 O 40 , [117,118] clay-supported heteropolyacid, [119] and/or lanthanum(III) triflate supported on nanomagnetic -Fe 2 O 3 . [120] Obviously, when a nitrile compound includes an active olefin, the reaction occurs at the C=C function rather than the cyano group, e.g., furfurylidenemalonitrile (112) reacted with (RO) 2 POH to yield, the phosphonates 113a-c. [121] On the other hand, the phosphonates 114a-c were obtained when TAP 1a-c were applied to the substrate 112…”
Section: H-chromen-4-yl-phosphonates 109 Via the Intermediates A (Scmentioning
confidence: 99%