Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 138984-26-6, is researched, SMILESS is C12=O[Rh+2]3(O=C4[N-]5CCCCC4)([N-]6C(CCCCC6)=O7)[N-](CCCCC8)C8=O[Rh+2]357[N-]1CCCCC2, Molecular C24H40N4O4Rh2Journal, Journal of the American Chemical Society called Ligand effects on dirhodium(II) carbene reactivities. Highly effective switching between competitive carbenoid transformations, Author is Padwa, Albert; Austin, David J.; Price, Alan T.; Semones, Mark A.; Doyle, Michael P.; Protopopova, Marina N.; Winchester, William R.; Tran, Andrea, the main research direction is diazo carbonyl preparation reaction rhodium catalyst; chemoselectivity diazo carbonyl reaction rhodium catalyst; cyclopropanation diazo carbonyl rhodium catalyst; aromatic substitution diazo carbonyl rhodium catalyst; insertion diazo carbonyl rhodium catalyst; cycloaddition aromatic diazo carbonyl rhodium catalyst; ligand effect rhodium catalyst reaction diazo.Name: Dirhodium(II) tetrakis(caprolactam).
Carboxylate and carboxamide ligands of dirhodium(II) catalysts control chemoselectivity in competitive metal carbene transformations of diazo compounds For competitive intramol. cyclopropanation vs. intramol. aromatic substitution with 1-diazo-3-aryl-5-hexen-2-ones (e.g., CH2:CMeCH2CHPhCOCHN2), use of Rh2(OAc)4 results in the products (e.g., I and II) from both transformations in nearly equal amounts, but dirhodium(II) perfluorobutyrate [Rh2(pfb)4] provides only the aromatic substitution product while dirhodium(II) caprolactamate [Rh2(cap)4] gives only the cyclopropanation product. Similar results are obtained from dirhodium(II) catalysts in competitive intramol. cyclopropanation vs. tertiary C-H insertion, aromatic cycloaddition vs. C-H insertion, cyclopropanation vs. aromatic cycloaddition, and C-H insertion vs. aromatic substitution. The order of reactivity for metal carbenes generated from Rh2(pfb)4 is aromatic substitution > tertiary C-H insertion > cyclopropanation ∼ aromatic cycloaddition > secondary C-H insertion, and the rate differences between them are as much as 100-fold. For Rh2(cap)4 the order of reactivity is cyclopropanation > tertiary C-H insertion > secondary C-H insertion > aromatic cycloaddition with aromatic substitution not observed as a competing process for the diazo compounds examined Control of chemoselectivity through charge and/or frontier MO properties of the intermediate metal carbene has been evaluated. Competitive product formation from Rh2(cap)4-catalyzed reactions of N-tert-butyl-N-benzyldiazoacetamide is temperature dependent over a narrow 15-deg range. The effect of carbene substituents other than the ligated dirhodium(II) on chemoselectivity is described and discussed.
There is still a lot of research devoted to this compound(SMILES：C12=O[Rh+2]3(O=C4[N-]5CCCCC4)([N-]6C(CCCCC6)=O7)[N-](CCCCC8)C8=O[Rh+2]357[N-]1CCCCC2)Name: Dirhodium(II) tetrakis(caprolactam), and with the development of science, more effects of this compound(138984-26-6) can be discovered.
Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI