Using the system of tetracyanoethylene, ammonium acetate and a carbonyl compound, the preparation of 2-[5-amino-2,3-dihydro-4H-imidazol-4-ylidene]malononitriles was carried out. The structures of these new dihydroimidazoles were determined by NMR experiments and by X-ray crystallography.
Tetracyanoethene and 1-Amino-1,2,2-ethenetricarbonitrile in the Synthesis of Heterocycles of Prospective Antioxidant and Antibacterial
作者:Ashraf A Aly、Tamer El Malah、Esam A. Ishak、Alan B. Brown、Wael M. Elayat
DOI:10.1002/jhet.2236
日期:2016.5
The structures of the products were elucidated via NMR, IR, massspectra, and elemental analyses. The mechanism of formation was discussed. Biological (against Gram‐positive and Gram‐negative bacteria) and antioxidant activities were tested. Some of these heterocycliccompounds showed high activity as antioxidant and antibacterial compounds. The structure–activity relationship was investigated.
Three-component synthesis of 2-(4-amino-2,5-dihydro-1H-imidazol-5-ylidene)malononitriles
作者:O. V. Ershov、A. V. Eremkin、Ya. S. Kayukov、A. N. Lyshchikov、O. E. Nasakin、V. A. Tafeenko
DOI:10.1134/s1070428008040179
日期:2008.4
2-(4-Amino-2,5-dihydro-1H-imidazol-4-yildene)malononitriles were synthesized by three-component reaction of tetracyanoethylene, carbonyl compound, and ammonium acetate. The synthesis can be performed in two steps with intermediate isolation of 2-aminoethene-1,1,2-tricarbonitrile, as well as using preliminarily prepared 2-aminoethene-1,1,2-tricarbonitrile and 1,3,5-trisubstituted 2,4-diazapentadienes.
The twofold interpenetrated three-connected three-dimensional (10,3)-net in 2-aminoethene-1,1,2-tricarbonitrile
作者:Viktor A. Tafeenko、Ksenia A. Paseshnichenko、Oleg V. Ershov、Aleksey V. Eremkin、Leonid A. Aslanov
DOI:10.1107/s0108270105016070
日期:2005.7.15
In the crystal structure of the title compound, C5H2N4, each molecule is linked by N-H...N=C hydrogen bonds to four other molecules, thus forming a network that can be described as a twofold interpenetrated three-connected three-dimensional (10,3)-net. The interpenetrated nets are related by (010) translation. If only intermolecular hydrogen bonds are taken into account, these nets can be considered as independent. However, the interactions between the cyano groups from different nets indicate mutual assistance of the two nets during their formation.