1. Cyanosilylation of aldehydes catalyzed by lanthanide derivatives comprising arylhydrazones of β-diketones
- Author
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Abel M. Maharramov, M. Fátima C. Guedes da Silva, Armando J. L. Pombeiro, Nazim T. Shamilov, Kamran T. Mahmudov, and Fatali E. Huseynov
- Subjects
Lanthanide ,Trimethylsilyl ,010405 organic chemistry ,Organic Chemistry ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Medicinal chemistry ,0104 chemical sciences ,Catalysis ,Inorganic Chemistry ,chemistry.chemical_compound ,chemistry ,Materials Chemistry ,Organic chemistry ,Methanol ,Physical and Theoretical Chemistry ,Trimethylsilyl cyanide ,Tetrahydrofuran ,Cyanohydrin ,Dichloromethane - Abstract
Two known lanthanide complexes, [KLa(HL 1 ) 2 {(CH 3 ) 2 NCHO} 2 (H 2 O) 3 ] ( 1 ) and [Sm(H 2 O) 9 ]( E -H 2 L 2 ) 3 ·2H 2 O ( 2 ) were prepared by reaction of lanthanum(III) and samarium(III) nitrates with potassium 3-(2-(2,4-dioxopentan-3-ylidene)hydrazinyl)-2-hydroxy-5-nitrobenzenesulfonate (KH 2 L 1 ) and potassium ( E,Z )-5-chloro-3-(2-(1,3-dioxo-1-phenylbutan-2-ylidene)hydrazinyl)-2-hydroxybenzenesulfonate (KH 2 L 2 ), respectively. Catalytic activities of 1 and 2 were evaluated in the cyanosilylation of aldehydes with trimethylsilyl cyanide in different solvents such as tetrahydrofuran, dichloromethane or methanol. Complex 1 was found to be efficient catalyst for the cyanosilylation reaction in methanol medium at room temperature, producing cyanohydrin trimethylsilyl ethers with good yields (76–99%).
- Published
- 2018
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