The 1:1 complexes formed in situ from nickel(II) acetate and the thiosemicarbazones of ortho-hydroxy aromatic aldehydes catalyze the hydrosilylation of imines. A variety of imines were reduced in good to excellent yields employing two equivalents of a silane such as triethylsilane and 5 mol% of the catalysts.
Development and competitive evaluation of methods for the reduction of (het)arylimines of cage-structured monoterpenoid ketones
作者:R. V. Brunilin、A. A. Vernigora、O. V. Vostrikova、A. V. Davidenko、M. B. Nawrozkij、N. A. Salykin、I. A. Novakov
DOI:10.1007/s11172-022-3576-1
日期:2022.8
Various methods for the reduction of (het)arylimines of cage-structured monoterpenoid ketones, l-fenchone and d-camphor, were explored. The best results were achieved using the NaBH4-NiCl2 • 6H2O system in 95% ethanol. The exception is halogenated aniline derivatives, in the case of which the reduction of the C-N bond is accompanied with the hydrogenolysis of the C-Hal bond.