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Norbornadiene
About: Norbornadiene is a research topic. Over the lifetime, 2389 publications have been published within this topic receiving 38603 citations.
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TL;DR: In this article, the activation of C-C bond in coordinated M (η4 bicyclo [2.2.1]-hepta-diene) or 2,5-NBD via protonation for 3d, 4d and 5d transition metals have been examined.
TL;DR: In this article, the mechanism of chloride abstraction has been investigated by i.m.r., n.m., and u.v., visible spectroscopy, conductimetry, and potentiometry.
Abstract: The reaction of [Mo(NO)2L2Cl2][L = MeCN, PhCN, CH2CHCN, pyridine (py), or PPh3; L2= 2,2′-bipyridine (bipy) or 1,2-bis(diphenylphosphino)ethane (dppe)] in 1,2-dimethoxyethane (dme) affords monocationic [Mo(NO)2L2Cl(dme)]+ and dicationic [Mo(NO)2L2(dme)2]2+ species. The mechanism of chloride abstraction has been investigated by i.r., n.m.r., and u.v.–visible spectroscopy, conductimetry, and potentiometry. The dme solvates, when treated with nitries or bipy, yield a series of cationic dinitrosylmolybdenum complexes. Some of the dicationic complexes catalyse the polymerisation of norbornadiene. The characterization of all new complexes is described.
TL;DR: In this paper, an efficient route to the synthesis of norbornadiene-tethered nitrones has been developed, and their intramolecular 1,3-dipolar cycloadditions were studied.
Abstract: Efficient routes to the synthesis of norbornadiene-tethered nitrones have been developed, and their intramolecular 1,3-dipolar cycloadditions were studied. The cycloadditions occurred in moderate to good yields for a variety of substrates and were found to be highly regio- and stereoselective, giving single regio- and stereoisomers in most cases.
TL;DR: One-pot protocols for the synthesis of previously unknown hybrid heterocyclic systems with the furoxanylpyridine core based on the tandem inverse-electron-demand hetero-Diels-Alder/retroDiels−Alder reactions of the tailor-made (1,2,4-triazin-3-yl)furoxans with 1-(pyrrolidino)cyclohexene and norbornadiene have been developed as discussed by the authors.
Abstract: Two convenient, facile, regioselective and highly effective one-pot protocols for the synthesis of previously unknown hybrid heterocyclic systems with the furoxanylpyridine core based on the tandem inverse-electron-demand hetero-Diels–Alder/retro-Diels–Alder reactions of the tailor-made (1,2,4-triazin-3-yl)furoxans with 1-(pyrrolidino)cyclohexene and norbornadiene have been developed. The methods comprise [4 + 2] cycloaddition of enamine or norbornadiene to the 1,2,4-triazine ring of (1,2,4-triazin-3-yl)furoxans followed by one-pot transformation of the formed intermediates and this affords an extensive series of polyheterocyclic ensembles combining furoxan and pyridine (tetrahydroisoquinoline, indenopyridine, terpyridine) rings in one molecule through a C–C bond in good to excellent yields.
TL;DR: The 2,3-dicyano derivative of (η4-C7H8)Fe(CO)P(OEt)3PPh3 has trigonal bipyramidal ground and transition states with an energy barrier to CO exchange of 5.4 kcal/mol as discussed by the authors.