Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov’t, Journal of Organic Chemistry called Catalytic Allylic Oxidation of Cyclic Enamides and 3,4-Dihydro-2H-Pyrans by TBHP, Author is Yu, Yang; Humeidi, Ranad; Alleyn, James R.; Doyle, Michael P., which mentions a compound: 138984-26-6, 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 C24H40N4O4Rh2, Synthetic Route of C24H40N4O4Rh2.
Allylic oxidation of heteroatom substituted cyclic alkenes, e.g. I [Z = NBoc, NTs, O; R = H, Me, Ph] by tert-Bu hydroperoxide (70% TBHP in water) using catalytic dirhodium caprolactamate [Rh2(cap)4] forms enone products with a variety of 2-substituted cyclic enamides and 3,4-dihyro-2H-pyrans, e.g. II. These reactions occur under mild reaction conditions, are operationally convenient to execute, and are effective for product formation with as low as 0.25 mol% catalyst loading. With heteroatom stabilization of the intermediate allylic free radical two sites for oxidative product formation are possible, and the selectivity of the oxidative process varies with the heteroatom when R = H. Cyclic enamides produce 4-piperidones in good yields when R = alkyl or aryl, but oxidation of 2H-pyrans also gives alkyl cleavage products. Alternative catalysts for TBHP oxidations show comparable selectivities but give lower product yields.
If you want to learn more about this compound(Dirhodium(II) tetrakis(caprolactam))Synthetic Route of C24H40N4O4Rh2, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(138984-26-6).
Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI