Results 41 to 50 of about 2,089,289 (186)
CHIMIA, 1987 The AlCl3-catalyzed [4 + 2]-cycloaddition of T-phenyl-substituted 3-vinylindoles with N-phenylmaleimide gives rise to new anellated carbazole derivatives with a high endo-preference.
Ludwig Pfeuffer, Ulf Pindur
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Iron-Catalyzed Cycloaddition Reaction of Diynes and Cyanamides at Room Temperature
, 2013 An iron-catalyzed [2 + 2 + 2] cycloaddition reaction of diynes and cyanamides at room temperature is reported. Highly substituted 2-aminopyridines were obtained in good to excellent yields with high regioselectivity.
Wan, Boshun +5 more
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Molecules, 2020 We present herein a straightforward and efficient pathway for the synthesis of pyrrolophthalazine cycloadducts via Huisgen [3 + 2] dipolar cycloaddition reactions of phthalazinium ylides to methyl propiolate or dimethyl acetylenedicarboxylate (DMAD).
Vasilichia Antoci +4 more
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Visible-Light-Induced Dearomatization via [2+2] Cycloaddition or 1,5-Hydrogen Atom Transfer: Regulating Reaction Pathways of Diradicals on Excited States [PDF]
, 2020 Visible-light-induced dearomatization reaction via energy transfer mechanism is an emerging strategy for the synthesis of highly strained polycyclic molecules. Transient, high-energy diradical species on excited states are typically involved in this type
Xiao, Zhang +3 more
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Nanomaterials, 2022 The utilization of CO2 attracts much research attention because of global warming. The CO2/epoxide cycloaddition reaction is one technique of CO2 utilization. However, homogeneous catalysts with both Lewis acidic and basic and toxic solvents, such as DMF,
Yi-Feng Lin +4 more
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Cycloaddition of Cyano-2-pyridones Bearing a Bromo or a Nitro Group [PDF]
, 2007 Cycloaddition of cyano-2(1H)-pyridones bearing a bromo or a nitro group at the pyridone ring with 2,3-dimethyl-1,3-butadiene carried out. Cycloaddition of 5-bromo-4-cyanopyridone gave cis- and trans-cycloadducts (isoquinolone derivative) in total yields ...
Fujita, Reiko +11 more
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Reactivity of (Z)-4-arylidene-5(4H)-oxazolones: [4+2] cycloaddition versus [4+3] cycloaddition/nucleophilic trapping [PDF]
, 2002 The use of different aluminum derivatives in the reaction between cyclopentadiene and (Z)-2-phenyl-4-arylidene-5(4H)-oxazolones, and in particular the use of different equivalents of the reagent, allows the modulation of the synthesis of the norbornane ...
Peregrina, J.M. [0000-0003-3778-7065] +3 more
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Beilstein Journal of Organic Chemistry, 2008 Copper-catalyzed, thermal or microwave promoted 1,3-dipolar cycloaddition (Click Reaction) of 2-propynyl and 3-butynyl 2,3,4-tri-O-acetyl-6-azido-6-deoxy-glycopyranosides in the D-gluco, D-galacto and D-manno series afford the corresponding dimeric ...
Nikolas Pietrzik +2 more
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Synthesis and reinvestigation of tetrazocines [PDF]
, 2004 This thesis is concerned with the study of tetrazocines. These rare, eight-membered ring systems containing four nitrogen atoms are in the infancy of their development. Little is known of their potential application, properties and generation.
Healy, Cathal
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Química Nova, 1997 Several methodologies for the generation of oxyallyl cations from polybromoketones and other substrates are discussed. The mechanistic aspect of the [3+4] cycloaddition reaction between these cations and dienes leading to the formation of seven membered ...
Antônio Jacinto Demuner +2 more
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