18934-20-8Relevant academic research and scientific papers
Synthesis and characterization of Schiff bases coordination compounds of lanthanide(III) perchlorates
Arora, Kishor,Sharma, Mukesh,Sharma
experimental part, p. 519 - 521 (2012/01/02)
Dicyanoethylation of m-toluidine was carried out by treating the aromatic primary amine with acryonitrile in acetic acid in presence of cuprous chloride. The cyanoethylated amine on formylation gave 2-methyl-4-NN-bis-2'- cyanoethylaminobenzaldehyde. The resulted aldehyde gave Schiff bases 2-methyl-4-NN-bis-2¢-cyanoethylaminobenzylidineaniline (MCEABAB), 2-methyl-4-NN-bis-2¢- cyanoethylaminobenzylidine p-chloroaniline (MCEABCAB), 2-methyl-4-NN-bis-2¢-cyanoethylaminobenzylidine p-toludine (MCEABPT) and 2-methyl-4-NN-bis-2¢-cyanoethylaminobenzylidine p-fluoroaniline (MCEABFAB) with aniline and three different substituted anilines. Lanthanide oxides viz., lanthanum oxide, praseodymium oxide and neodymium oxide were chosen to synthesize new complexes, heaving a general formula [Ln(L)6(ClO4)3] [where Ln = La, Pr and Nd; L = MCEABAB, MCEABCAB, MCEABPT and MCEABFAB]. In all twelve new lanthanide(III) perchlorate complexes of Schiff bases have been prepared. Elemental analyses, molecular weight, melting point, conductivity measurement, spectral studies, thermal analysis and microbial activities of the complexes were carried out.
Addition of amines and phenols to acrylonitrile derivatives catalyzed by the POCOP-type pincer complex [{κP,κC, κP-2,6-(i-Pr2PO)2C6H 3}Ni(NCMe)][OSO2CF3]
Lefvre, Xavier,Durieux, Guillaume,Lesturgez, Stéphanie,Zargarian, Davit
experimental part, p. 1 - 7 (2011/03/23)
The pincer-type complex [{κP,κC, κP-2,6-(i-Pr2PO)2C6H 3}Ni(NCMe)][OSO2CF3] (1) can serve as a precatalyst for the regioselective, anti-Markovnikov addition of nucleophiles to activated olefins. The catalyzed additions of aliphatic amines to acrylonitrile, methacrylonitrile, and crotonitrile proceed at room temperature and give quantitative yields of products resulting from the formation of C-N bonds. On the other hand, aromatic amines or alcohols are completely inert toward methacrylonitrile and crotonitrile, and much less reactive toward acrylonitrile, requiring added base, heating, and extended reaction times to give good yields. The catalytic reactivities of 1 are thought to arise from the substitutional lability of the coordinated acetonitrile that allows competitive coordination of the nitrile moiety in the olefinic substrates; this binding enhances the electrophilicity of the CC moiety, rendering them more susceptible to attack by nucleophiles. In some cases, RCN → Ni binding results in double bond isomerization/migration (allyl cyanide) or attack of nucleophiles at the nitrile moiety (cinnamonitrile and 4-cyanostyrene). Reaction of morpholine with 1 at 60 °C led to formation of the amidine derivative 2 that has been characterized by X-ray crystallography.
