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, Tetrahedron called Selective arylation of aldehydes with di-rhodium(II)/NHC catalysts, Author is Trindade, Alexandre F.; Andre, Vania; Duarte, M. Teresa; Veiros, Luis F.; Gois, Pedro M. P.; Afonso, Carlos A. M., the main research direction is selective arylation aldehyde rhodium NHC catalyst ab initio.Related Products of 138984-26-6.
Here is described the preparation of four new rhodium(II) complexes bearing axial NHC ligands. The presence of electron-withdrawing bridging ligands resulted in an enhanced reactivity in the arylation of aldehydes with boronic acids when compared with the tetraacetate counterparts. Complex (Rh2tfa4(IPr)2) proved to be the most active catalyst for this transformation allowing the selective conversion of aromatic, aliphatic and vinyl aldehydes into the resp. alcs. in excellent yields. It was demonstrated that the good group tolerance could be further extended to aromatic and conjugated ketones. DFT calculations carried out on this system showed the complementarily of the bridging ligands and axial ligand in these dinuclear complexes. It was also disclosed that Rh(II)/NHC catalytic system can promote the racemization of 1-Ph ethanol.
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