Conformational analysis of the 4a-methyl octahydrophenanthrene system. A spectroscopic and theoretical approach.
作者:Alejandro J. Vila、Rolando A. Spanevello、Alejandro C. Olivieri、Manuel Gonzalez Sierra、James D. McChesney
DOI:10.1016/s0040-4020(01)81076-0
日期:1989.1
Solution low temperature 1H and 13C NMR experiments were run for the cis 4a-Methyl Octahydrophenanthrene hydrocarbon 1b, together with force-field and semiempirical MO calculations, which allow to predict its conformational preferences, and to calculate the kinetic parameters for this equilibrium. The synthesis and spectroscopic analysis of related rigid models (1a and 7) and of a series of configurationally
对顺式4a-甲基八氢菲烃1b进行了溶液低温1 H和13 C NMR实验,并进行了力场和半经验MO计算,从而可以预测其构象偏好,并计算出该平衡的动力学参数。有关的刚性模型(1a和7)以及一系列构型定义的4a-甲基八氢菲酚(9a至13c)的合成和光谱分析证实了这些发现,并允许得出一些经验规则来预测立体化学。作为取代的4a-甲基八氢菲菲所采用的优选构象。