Nucleophilic Substitution by a Hydroxide Ion at a Vinylic Carbon: Ab Initio and Density Functional Theory Studies on Methoxyethene, 3-Methoxypropenal, 2,3-Dihydro-4H-pyran-4-one, and 4H-Pyran-4-one [PDF]
, 2016 Nucleophilic substitutions by a hydroxide ion at vinylic carbons of methoxyethene (system A), 3-methoxypropenal (system B), 2,3-dihydro-4H-pyran-4-one (system C), and 4H-pyran-4-one (system D) were calculated by Becke's three-parameter hybrid density ...
Pavol Zahradník (3026718) +2 more
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A synthesis of carbasugar-sugar pseudodisaccharides via a cycloaddition-cycloreversion reaction of 2 H-Pyran-2-ones [PDF]
, 2023 Cycloaddition of 3-carbomethoxy-2H-pyran-2-one to a vinylated sugar followed by the loss of bridging CO2 from the cycloadduct affords a cyclohexadiene which can be manipulated to a carbasugar-sugar pseudodisaccharide. © 2010 American Chemical Society.
Mohamed Haji Abdullahi (2246809) +2 more
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(5S,6R)-6-Bromo-6-methyl-5-phenyl-3,4,5,6-tetrahydro-2H-cyclopenta[b]pyran-7-one [PDF]
, 2011 The title compound, C15H15BrO2, was synthesized by a Brønsted acid-catalysed domino electrocyclization-halogenation reaction. The five-membered ring is essentially planar (r.m.s.
Bolte, Michael +3 more
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Enantioselective synthesis of spiro[4H-pyran-3,3′-oxindole] derivatives catalyzed by cinchona alkaloid thioureas: Significant water effects on the enantioselectivity [PDF]
, 2019 An efficient stereoselective three-component reaction for the synthesis of functionalized spiro[4H-pyran-3,3′-oxindole] derivatives was realized through an organocatalyzed domino Knoevenagel/Michael/cyclization reaction using a cinchonidine-derived ...
Hadi D. Arman (1348743) +3 more
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Synthesis of Aminonicotinonitriles and Diaminopyridines through Base-Catalyzed Ring Transformation of 2H-Pyran-2-ones† [PDF]
, 2016 An efficient and convenient synthesis of 2-amino-6-aryl-4-methylsulfanylnicotinonitriles (2), 2-amino-6-aryl-4-substituted-aminonicotinonitriles (4), and 2-amino-6-aryl-4-substituted-aminopyridines (6) has been delineated and illustrated through base ...
Farhanullah (3208797) +3 more
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A simple synthetic approach to the construction of novel 2-amino-5-mercapto-6-(mercaptomethyl)-4-aryl-4H-pyran-3-carbonitriles [PDF]
, 2023 We discovered a simple synthetic approach to the construction of novel 2-amino-5-mercapto-6-(mercaptomethyl)-4-aryl-4H-pyran-3-carbonitriles (3a-i) under metal-free conditions. The methodology depended on the treatment of 2-arylidenemalononitriles (2a-i)
Mohammed A. Assiri (5412098) +1 more
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Phenolic Compounds in Bacterial Inactivation: A Perspective from Brazil
Antibiotics, 2023 Phenolic compounds are natural substances that are produced through the secondary metabolism of plants, fungi, and bacteria, in addition to being produced by chemical synthesis.
Angélica Correa Kauffmann +1 more
doaj +1 more source
Acta Chimica Slovenica, 2018 The reaction of anthranilic acid with ethoxycarbonylisothiocyanate gave the ethyl 4-oxo-2-thioxo-1,2-dihydroquinazoline-3(4H)-carboxylate (4). The reaction of compound 4 with hydrazine hydrate and a-halocarbonyl derivatives was found to give either ...
Rafat M. Mohareb, Peter A. Halim
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Acta Crystallographica Section E: Crystallographic Communications, 2019 The title compound, C35H27ClN4O3, crystallized with two independent molecules (A and B) in the asymmetric unit. In both molecules, the pyran and pyridine rings adopt envelope and chair conformations, respectively.
S. Syed Abuthahir +4 more
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Stereospecific Synthesis of 2,3-Dihydro-4H-pyran-4-ones by Hg(II)- Catalyzed Rearrangement of 1-Alkynyl-2,3-epoxy Alcohols [PDF]
, 2016 Stereospecific Synthesis of 2,3-Dihydro-4H-pyran-4-ones by Hg(II)- Catalyzed Rearrangement of 1-Alkynyl-2,3-epoxy ...
Steven Harper (2094226) +3 more
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