Conformational analysis of benzoanellated nine-membered rings, Part 1. 1,4,5,7-tetrahydro-3H-2,6-benzodithionin derivatives
作者:Barbara Rys、Helmut Duddeck、Monika Hiegemann
DOI:10.1016/s0040-4020(01)86418-8
日期:1991.1
The NMR spectra of compounds 1–5, recorded at different temperatures, are discussed and interpreted in terms of conformational equilibrium. Ground state conformations are found to be chiral, ring inversion barriers are surprisingly high (ca 48 kJ/mol).
讨论了在不同温度下记录的化合物1-5的NMR光谱,并根据构象平衡进行了解释。发现基态构象是手性的,环反转障碍极高(约48 kJ / mol)。