作者:L. Nicolas、M. Beugelmans-Verrier、J. Guilhem
DOI:10.1016/s0040-4020(01)98883-0
日期:1981.1
synthesis, 1H and 13C NMR spectra of acids 1 to 4 and methyl esters 5 to 8 are described. Interaction of aromatic and polar groups in the cis acids must be steric in origin and not due to charge transfer complex or hydrogen bonding. The structure of 1e,3a,5e and 7e has been determined by X-Ray crystallography. 1H and 13C NMR studies indicate that, in the cis compounds, the proximity of aromatic and polar groups
描述了酸1至4和甲酯5至8的合成,1 H和13 C NMR光谱。顺式酸中芳族和极性基团的相互作用必须起源于空间,而不是由于电荷转移络合物或氢键。的结构1E,3A,图5e和图7e已通过X-射线结晶学确定。1 H和13 C NMR研究表明,在顺式 在化合物中,芳族和极性基团的接近往往会给它们强加一些主要的构象,这些构象在晶体或溶液中应类似。