20409-48-7Relevant articles and documents
Synthesis, Solid-state and Solution Structures of Bis(N,N'-bis-1,2-diaminoethane)-silver(I) and -copper(I) Trifluoromethanesulfonate Complexes
Modder, Johan F.,Leijen, Ronald J.,Vrieze, Kees,Smeets, Wilberth J. J.,Spek, Anthony L.,Koten, Gerard van
, p. 4021 - 4028 (1995)
Reaction of 2 equivalents of the thienyl ketimines 2C2H4 (R = Me or SC4H3) with 1 equivalent of M'(O3SCF3) (M = Ag or Cu) resulted in formation of stable 2C2H4)2> complexes.The crystal structures of 2C2H4)2> and 2C2H4)2> have been determined.Both unit cells contain discrete anions and, basically isostructural, complex cations.The co-ordination sphere of the metal(I) centre is dominated by four imine N atoms provided by two symmetrically, bidentate co-ordinating 2C2H4 ligands.Four thiophene S atoms are also in proximity of the metal nucleus , but do not co-ordinate.The AgN4 geometry is flattened, as indicated by the spatial geometry of the four donor atoms, and tends more to square planar than to the usual tetrahedral arrangement.The CuN4 geometry is slightly compressed from tetrahedral.A characteristic of these complexes is their very low solubility which makes further spectroscopic studies difficult.Various 1H NMR experiments have established that the complex cations are isostructural, having a tetrahedral co-ordination geometry similar to that found in the crystals, comprising symmetrically co-ordinating, bidentate ligands.There are no indications that the solution structure is compressed.The solution structure is only kinetically stable at low temperatures (/= 180 K); at more elevated temperatures ligand exchange occurs, which is rapid at ambient temperatures.
Cp?Co(III)-Catalyzed C-H Alkylation with Maleimides Using Weakly Coordinating Carbonyl Directing Groups
Mandal, Rajib,Emayavaramban, Balakumar,Sundararaju, Basker
supporting information, p. 2835 - 2838 (2018/05/29)
A novel protocol for ortho-C-H alkylation of aromatic and heteroaromatic ketones and esters under Cp?Co(III) catalysis has been developed for the first time. The reaction proceeds through initial cyclometalation via weak chelation-assisted C-H bond activation, followed by coordination of activated alkene, insertion between Co-C, and protodemetalation.
Preparation of acylthiophenes by iron(III) chloride catalyzed reactions of tris(2-thienyl)stibanes with acyl chlorides
Kakusawa, Naoki,Nakagawa, Yoshie,Toshima, Yutarou,Yasuike, Shuji,Kurita, Jyoji
, p. 1170 - 1175 (2015/07/15)
The reactions of tris(2-thienyl)stibanes with various acyl chlorides, using a catalytic amount of iron(III) chloride, afforded 2-acylthiophenes. Iron(III) chloride is presumed to act as a Lewis acid, and the ipso substituent of each 2-thienyl group of tris(2-thienyl)stibane is replaced with an acyl group. The reaction is highly atom-efficient in that all three thiophene rings of tris(2-thienyl)stibane take part in the reaction. The reaction procedure is so simple that it can also be carried out under solvent-free and aerobic conditions.
