作者:Lutz F. Tietze、Heiko J. Schuster、J. Marian von Hof、Sonja M. Hampel、Juan F. Colunga、Michael John
DOI:10.1002/chem.201001047
日期:2010.11.8
ortho‐Haloarylcarbamates like 1–4 show a high rotational barrier about the Naryl bond of up to 91.6 kJ mol−1 as found for 1, which was determined by 2D exchange NMR spectroscopy (EXSY). It was further demonstrated that the height of the barrier not only depends on the substituents at the axis of chirality, but is also influenced by electronic effects.