59620-57-4Relevant academic research and scientific papers
Investigation of the full reversal of selectivity in the reaction of aniline with 1,3-dichloro-1,3-bis(dimethylamino)vinamidinium salts
Tripathi, Monika,Regnier, Vianney,Lincheneau, Christophe,Martin, David
, p. 15016 - 15020 (2017/12/15)
The addition of aniline, even in excess, to a solution of 1,3-dichloro-1,3-bis(dimethylamino)vinamidinium salt in the presence of triethylamine invariably leads to the formation of 2,4-bis(dimethylamino)quinoline. Conversely, delaying the addition of the base leads to the formation of 1,3-dimethylamino-N,N′-diphenylpropane-1,3-diimine, even when only a substoichiometric amount of aniline was used. A DFT study led to the consideration of factors that accounted for this reversal of reactivity. The role of a secondary orbital interaction in key transition states, as well as the role of solvent, is discussed.
Highly Electron-Rich β-Diketiminato Systems: Synthesis and Coordination Chemistry of Amino-Functionalized “N-nacnac” Ligands
Do, Dinh Cao Huan,Keyser, Ailsa,Protchenko, Andrey V.,Maitland, Brant,Pernik, Indrek,Niu, Haoyu,Kolychev, Eugene L.,Rit, Arnab,Vidovic, Dragoslav,Stasch, Andreas,Jones, Cameron,Aldridge, Simon
supporting information, p. 5830 - 5841 (2017/04/28)
The synthesis of a class of electron-rich amino-functionalized β-diketiminato (N-nacnac) ligands is reported, with two synthetic methodologies having been developed for systems bearing backbone NMe2 or NEt2 groups and a range of N-bound aryl substituents. In contrast to their (Nacnac)H counterparts, the structures of the protio-ligands feature the bis(imine) tautomer and a backbone CH2 group. Direct metalation with lithium, magnesium, or aluminium alkyls allows access to the respective metal complexes through deprotonation of the methylene function; in each case X-ray structures are consistent with a delocalized imino-amide ligand description. Transmetalation using lithium N-nacnac complexes is then exploited to access p- and f-block metal complexes, which allow for like-for-like benchmarking of the N-nacnac ligand family against their more familiar Nacnac counterparts. In the case of SnII, the degree of electronic perturbation effected by introduction of the backbone NR2 groups appears to be constrained by the inability of the amino group to achieve effective conjugation with the N2C3 heterocycle. More obvious divergence from established structural norms is observed for complexes of the harder YbII ion, with azaallyl/imino and even azaallyl/NMe2 coordination modes being demonstrated by X-ray crystallography.
