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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 unusual [(2+2)+(2 + 2)] adduct 3 was confirmed by the X-ray crystal structure analysis, and it was shown that it is easily accessible from the reaction of diyne 1 and norbornadiene (NBD) in the presence of the rhodium catalyst.
Abstract: Fluoranthene 2 and heptacycle 3 are easily accessible from the reaction of diyne 1 and norbornadiene (NBD) in the presence of the rhodium catalyst. The unusual [(2+2)+(2+2)] adduct 3 was confirmed by the X-ray crystal structure analysis.
TL;DR: In this paper, a complete account of the intermolecular and intramolecular Pauson-Khand reactions of N-(2-alkynoyl) derivatives of chiral 2-oxazolidinones is presented.
Abstract: complete account of the intermolecular and intramolecular Pauson–Khand reactions of N-(2-alkynoyl) derivatives of chiral 2-oxazolidinones is presented. The intermolecular Pauson–Khand reactions with norbornene or norbornadiene take place under mild conditions and in high yields. Phenyl- or trimethylsilylpropiolate derivatives lead to the exclusive formation of 1,4-dicarbonyl regioisomers, while mixtures of 1,3- and 1,4-regioisomers are obtained with tetrolate derivatives. The diastereoselectivity of the reaction, determined by the substitution pattern of the oxazolidinone moieties, can be very high (up to 17.5:1 dr) for the formation of 1,4-dicarbonyl regioisomers, and the diastereomeric products can often be separated by column chromatography. Under the appropriate conditions, the intramolecular Pauson–Khand reactions of oxazolidinone-derived enynes can also take place with very good yields, but with low diastereoselectivities. The absolute configurations of several adducts have been determined, and the stereochemical outcome of the reaction has been rationalized.
TL;DR: In this paper, the reaction of [Rh(diene)(acac)] (diene=cyclooctadiene or norbornadiene; acac=acetylacetonate) with bidentate ligands of the type Ph2P(CH2)nSR (n=1, 2 or 3; R=Me, Et, Ph, not all combinations) or cis-Ph2PCHCHPPh2 leads to [Rh[diene]-+ or [RH[LL]2]+, depending on the stoichiometry
Abstract: The reaction of [Rh(diene)(acac)] (diene=cyclooctadiene or norbornadiene; acac=acetylacetonate) with bidentate ligands of the type Ph2P(CH2)nSR (n=1, 2 or 3; R=Me, Et, Ph, not all combinations) or cis-Ph2PCHCHPPh2 leads to [Rh(diene)(LL)]+ or [Rh(LL)2]+, depending on the stoichiometry of the reaction. The complexes were fully characterized by 1H and 31P NMR spectroscopy.
TL;DR: The front cover artwork is provided by the group of Prof. Dr. Christian Papp at Physical Chemistry II of FAU Erlangen-Nürnberg and FU Berlin this paper .
Abstract: The front cover artwork is provided by the group of Prof. Dr. Christian Papp at Physical Chemistry II of FAU Erlangen-Nürnberg and FU Berlin. The image shows the isomerization reaction of the molecule pair 2,3-dicyano-norbornadiene/quadricyclane as potential molecular solar thermal (MOST) energy storage system. Read the full text of the Research Article at 10.1002/cphc.202200199.