Abstract:
The Knövenagel–Michael–Mannich cascade reaction of aromatic aldehyde (3 equiv.), malononitrile (2 equiv.) and ammonium acetate or aqueous ammonia provides convenient stereoselective access to cis,cis-2,4,6-triaryl-3,3,5,5-tetracyanopiperidines in 62–94% yields. Six new bonds form as a result of the domino process, ammonium acetate serving as a nitrogen source.
Citation:
A. N. Vereshchagin, K. A. Karpenko, M. N. Elinson, E. O. Dorofeeva, A. S. Goloveshkin, M. P. Egorov, “Pseudo six-component stereoselective synthesis of 2,4,6-triaryl-3,3,5,5-tetracyanopiperidines”, Mendeleev Commun., 28:4 (2018), 384–386
Linking options:
https://www.mathnet.ru/eng/mendc1774
https://www.mathnet.ru/eng/mendc/v28/i4/p384
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