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Pericyclic Cascade toward Isochromenes: Application to the Synthesis of Alkaloid Benzosimuline
(American Chemical Society, 2016-09)
The synthesis of biologically active alkaloid benzosimuline, isolated from the shrub Zanthoxylum simulans, is reported. Key transformation involves an oxa-6π electrocyclic ring-opening/hetero-Diels-Alder pericyclic cascade. ...
Novel [3+2] 1,3-cycloaddition of the ionized carbonyl ylide +CH2OCH2 center dot with carbonyl compounds in the gas phase
(Amer Chemical SocWashington, 1997)
Pseudo-Pericyclic Reactions: Aromatic Compound Derivatives as Electrophiles in Polar Diels-Alder Reactions. An Experimental and Theoretical Study
(The Research Trends Editorial, 2014-11)
The Diels-Alder reaction is considered a pericyclic procces. However, depending of the structure of the diene and the dienophile the nature of this reaction can change. In the last years we have worked with aromatic nitro ...
NORMAL AND INVERSE ELECTRON DEMAND DIELS-ALDER CYCLOADDITION OF PROTONATED AND METHYLATED CARBONYL-COMPOUNDS IN THE GAS-PHASE
(John Wiley & Sons LtdW SussexInglaterra, 1995)
Multicomponent reactions mediated by NbCl5 for the synthesis of phthalonitrile-quinoline dyads: Methodology, scope, mechanistic insights and applications in phthalocyanine synthesis
(2018-04-01)
Herein, we demonstrate the efficiency of NbCl5 to promote a multicomponent reaction (MCR) for the synthesis of a library of phthalonitrile-quinoline dyads, which are very useful and new functionalized building blocks for ...
Quantitative characterization of the global electrophilicity power of common diene/dienophile pairs in Diels-Alder reactions
(2002)
The global electrophilicity power, ω, of a series of dienes and dienophiles commonly used in Diels-Alder reactions may be conveniently classified within a unique relative scale. Useful information about the polarity of ...
Exploring two-state reactivity pathways in the cycloaddition reactions of triplet methylene
(AMER CHEMICAL SOC, 2005-05-12)
Spin forbidden 1,2-cycloadditions of triplet methylene to alkenes have been theoretically studied as an example of the two-state reactivity paradigm in organic chemistry. The cycloadditions of triplet methylene to ethylene ...
Synthesis of N-heterocycles and building blocks using multicomponent, photochemical and electrochemical approaches
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Química - PPGQCâmpus São Carlos, 2020-02-17)
Multicomponent reactions and protocols mediated by light and electrochemistry are powerful tools for modern organic synthesis. Moreover, they obey several principles of green chemistry such as atom economy, catalysis, waste ...
Chemical reactivity descriptors for ambiphilic reagents: Dual descriptor, local hypersoftness, and electrostatic potential
(2009)
The second-order response of the electron density with respect to changes in electron number, known as the dual descriptor, has been established as a key reactivity indicator for reactions like pericyclic reactions, where ...
Histopathology of the nematodes Radopholus similis, Pratylenchus coffeae, Rotylenchulus reniformis and Meloidogyne incognita in plantain (Musa acuminata x M. balbisiana, AAB)Histopatología de los nematodos Radopholus similis, Pratylenchus coffeae, Rotylenchulus reniformis y Meloidogyne incognita en plátano (Musa acuminata x M. balbisiana, AAB)
(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 2006)