Synthesis of Vinyl Nitriles
Lewis-acid catalysts such as AlMe3, AlMe2Cl, and BPh3 significantly improve the efficiency of the nickel-catalyzed aryl- and alkenylcyanation of alkynes. Electron-rich cyanides, which exhibit poor reactivity in the absence of Lewis acids, readily undergo the arylcyanation reaction under the newly disclosed conditions.
Y. Nakao, A. Yada, S. Ebata, T. Hiyama, J. Am. Chem. Soc., 2007, 129, 2428-2429.
A simple three-step single-pot procedure for Z-stereoselective synthesis of β-monosubstituted acrylonitriles involves olefination of aldehydes with an in situ generated α-diaminoboryl carbanion species. Various aromatic and aliphatic aldehydes were smoothly converted into the corresponding (Z)-olefin products in good yields.
T. Tomioka, Y. Takahashi, T. G. Vaughan, T. Yanase, Org. Lett., 2010, 12, 2171-2173.