Metal-assisted reactions. Part 29. Structure and hydrogenolysis of C–N bonds in derivatives of aromatic amines. Bond length and electronegativity changes from X-ray crystallographic data
作者:Amadeu, F. Brigas、William Clegg、Christopher J. Dillon、Custodia F. C. Fonseca、Robert A. W. Johnstone
DOI:10.1039/b102571f
日期:——
Pseudosaccharyl and phenyltetrazolyl derivatives 1â6 were prepared with the aim of weakening the originally strong CâN bond in aromatic amines and facilitating its hydrogenolysis. Structural analyses of the amines 1â6 by 1H and 13C NMR spectroscopy and X-ray diffraction methods have revealed major changes in CâN bond lengths on derivatization as a result of changes in conjugation. These changes are discussed in relation to the observed reactivity of compounds 1â6 towards catalytic and non-catalytic CâN bond hydrogenolysis.
制备假糖醛基和苯基四唑基衍生物 1â6 的目的是削弱芳香胺中原本很强的 CâN 键,促进其氢解。通过 1H 和 13C NMR 光谱以及 X 射线衍射方法对胺 1â6 进行的结构分析表明,由于共轭作用的变化,CâN 键长度在衍生化过程中发生了重大变化。这些变化与所观察到的化合物 1â6 对催化和非催化 CâN 键氢解的反应性有关。