Péter Baranyi∗, Péter Korondi∗∗, and Kazuo Tanaka∗∗∗ ∗Computer and Automation Research Institute of the Hungarian Academy of Sciences H-1111 Budapest, Kende u. 13-17, Hungary E-mail: [email protected] ∗∗Department of Automation and Applied Informatics, Budapest University of Technology and Economics, Hungary E-mail: [email protected] ∗∗∗Department of Mechanical Engineering and Intellig...

1 Faculty of Information Technology, Pázmány Péter Catholic University, Práter u. 50/A, 1083 Budapest, Hungary 2Computer and Automation Research Institute of the Hungarian Academy of Sciences, Kende u. 13-17. , 1111 Budapest, Hungary 3 Infobionic and Neurobiological Plasticity Research Group, Hungarian Academy of Sciences, Pázmány University and Semmelweis University, Práter u. 50/A, 1083 Budap...

By adjustment of the electronic properties of the ancilliary ligands, high selectivity can be achieved for either [4 + 2] or [4 + 3] cycloaddition reactions of allene-dienes catalyzed by gold(I). Triarylphosphitegold(I) complexes are employed as catalysts for a [4 + 2] cycloaddition reaction leading to alkylidenecyclohexenes. Conversely, di-tert-butylbiphenylphosphinegold(I)-catalyzed reactions...

Cycloaddition is a fundamental transformation, featuring the assembly of complex cyclic molecules with multiple stereocenters. We report here silver-catalyzed [3+2]-cycloaddition 2,3-disubstituted cyclobutenones an array azomethine ylide...

Two metal-free, formal [2 + 2 + 2] cycloaddition strategies for the construction of polycyclic pyridine derivatives are described that proceed via pericyclic cascade mechanisms featuring the participation of unactivated cyano groups as enophile and dienophile cycloaddition partners.

in this paper the synthesis of some new polyaromatic monocyclic β-lactams has been reported. these cycloadducts have been synthesized by the [2+2] ketene-imine cycloaddition reaction known as the staudinger reaction. all of the products have been fully characterized by ir, 1h-nmr, 13c-nmr, mass spectroscopy and elemental analyses. the x-ray crystal structure of a cis β-lactam has been also pres...

Mathematical models of fullerenes are cubic planar maps with pentagonal and hexagonal faces. As a consequence of Eulers’s formula the number of pentagons in such a map is 12. Conversly, for any integer α ≥ 0, there exists a fullerene map with precisely α hexagons unless α = 1. In this paper, we consider hyperbolic analogues of fullerenes, which are defined as cubic maps of face-type (6, k) on o...

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Strain promoted cycloaddition is presented as a tool for RNA conjugation on the solid phase; RNA-cyclooctyne conjugates are prepared by cycloaddition to both azide (strain-promoted azide-alkyne cycloaddition, SPAAC) and nitrile oxide dipoles (strain-promoted nitrile oxide-alkyne cycloaddition, SPNOAC). The conjugation is compatible with 2'-OMe blocks and with 2'-O-TBDMS protection on the ribose...