Results 101 to 110 of about 7,050 (214)
E-Journal of Chemistry, 2011 Reaction of N1,N2-di-(4-methoxyphenyl)- or N1,N2-di-(4-hydroxyphenyl) -amidines (1a-d) with 3,4,5,6-tetrachloro-1,2-benzoquinone (2) in ethyl acetate at room temperature led to formation of new 3,4,5-trichloro-6-(2-hydroxy-6-methyldibenzo[d,f][1,3 ...
Mohsen A. M. Gomaa
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Multicomponent Synthesis of 3,6-Dihydro-2H-1,3-thiazine-2-thiones
Molecules, 2012 Non-fused 3,6-dihydro-2H-1,3-thiazine-2-thiones constitute a so far rather unexplored class of compounds, with the latest report dating back more than two decades.
Frans J. J. de Kanter +6 more
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ChemistrySelect, Volume 11, Issue 11, 18 March 2026.ABSTRACT In this study, three pyrimidine‐5‐carbonitrile derivatives (PNs) were synthesized using a one‐pot multicomponent reaction involving malononitrile, aromatic aldehydes, and an amidine derivative in an aqueous glucose solution as a fully green medium are 2,4‐diamino‐6‐phenylpyrimidine‐5‐carbonitrile (PN‐1), 2,4‐diamino‐6‐(4‐methoxyphenyl ...
Mohammad Salman +5 more
wiley +1 more source
Applying Green Chemistry Principles in the Electrophilic Bromination of Indole-3-Acetic Acid [PDF]
, 2014 The goals of green chemistry are to reduce or eliminate the use of hazardous reagents, prevent the synthesis of toxic products and byproducts, and improve the overall efficiency of chemical reactions.
Murphy, Kyle
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3-Amino-2H-azirine, Moleküle mit vielfältigen Reaktionsmöglichkeiten
CHIMIA, 1979 3-Amino-2H-azirines, cyclic three-membered amidines with an estimated ring strain of about 200 kJ/mole, undergo a variety of reactions. Thereby, each of the azirine bonds can be broken: Thermolysis leads to the rupture of the C(2),C(3)-bond, with strong
Heinz Heimgartner
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Towards the catalytic asymmetric bromination of alkenes
, 2011 This thesis relates our efforts towards the development of a general method for the catalytic asymmetric bromination of alkenes. Previous work within the group had reported the synthesis and the use of 2,6-di-[(4R,5R)-4,5-diphenyl-4,5-dihydro-1H-imidazol-
Cailleau, Thaïs, Cailleau, Thaïs
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Ring transformations in reactions of pyrimidine and N-alkylpyrimidinium salts with nucleophile [PDF]
Paper IOn treatment with liquid ammonia at -33°C, the quaternary pyrimidinium salts, i.e. 1-methylpyrimidinium methyl sulfate, 1,2-dimethylpyrimidinium iodide, 1,4,6-trimethyl-pyrimidinium iodide and 1,2,4,6-tetramethylpyrimidinium iodide demethylate ...
Oostveen, E.A.
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Manejo Integrado de Plagas para el control de Varroa destructor y sus implicaciones para las colonias de Apis mellifera [PDF]
, 2014 Integrated Pest Management (IPM) is a pest management system that, in the socioeconomic context of farming systems, the associated environment and the population dynamics of the pest species, utilizes all suitable techniques in a compatible manner as ...
Barrios, Carlos +7 more
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Beilstein Journal of Organic ChemistryA chitosan-supported CuI (CS@CuI) catalyst was developed for the synthesis of quinazolinones from 2-halobenzoic acids (including iodine and bromine) and amidines. The reaction proceeds under mild reaction conditions, demonstrating a broad substrate scope
Xuhong Zhao +6 more
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Beilstein Journal of Organic ChemistryThe Groebke–Blackburn–Bienaymé (GBB) three-component reaction, discovered in 1998, is a very efficient strategy to assemble imidazo[1,2-a]-heterocycles starting from amidines, aldehydes and isocyanides.
Cristina Martini +2 more
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