Sulfated tungstate catalyzed activation of nitriles: addition of amines to nitriles for synthesis of amidines
作者:Sachin D. Veer、Kamlesh V. Katkar、Krishnacharya G. Akamanchi
DOI:10.1016/j.tetlet.2016.07.073
日期:2016.9
the synthesis of amidines by direct nucleophilic addition of amines to nitriles using sulfated tungstate as heterogeneous catalyst is described. Highlight of the method is its applicability for the synthesis of amidines using a wide variety of amines including ammonia as ammonium acetate and nitriles. Catalyst is mildly acidic, stable, easy to prepare and separate from the reaction mass.
The Reaction of Halogenomagnesium Dialkylamides with Nitriles. The Preparation of N,N-Disubstituted Amidines
作者:Emil Lorz、Richard Baltzly
DOI:10.1021/ja01185a073
日期:1948.5
Adams; Beebe, Journal of the American Chemical Society, 1916, vol. 38, p. 2770
作者:Adams、Beebe
DOI:——
日期:——
Cyanide-Free Synthesis of Air Stable N-Substituted Li and K Cyanamide Salts from Tetrazoles. Applications toward the Synthesis of Primary and Secondary Cyanamides as Precursors to Amidines
作者:Edouard Duchamp、Stephen Hanessian
DOI:10.1021/acs.orglett.0c03085
日期:2020.11.6
A practical two-step synthesis of N,N′-disubstituted cyanamides consists in the low-temperature metalation of N-substituted 5H-tetrazoles that undergo spontaneous cycloreversion at 0 °C releasing dinitrogen, and forming N-metalated cyanamides that can be reacted in situ with a variety of electrophiles. Remarkably, the N-substituted Li and K cyanamides are air stable white solids at room temperature