Structures of Addition Products of Acetylenedicarboxylic Acid Esters with Various Dinucleophiles. An application of C, H-spin-coupling constants
作者:Ulrich Vögeli、Wolfgang von Philipsborn、Kuppuswamy Nagarajan、Mohan D. Nair
DOI:10.1002/hlca.19780610207
日期:1978.3.8
Heterocyclic compounds obtained by addition of acetylenedicarboxylic acid esters to thioureas, cyclic amidines and o-difunctionalized aromatic systems have been studied by 13C-NMR. In particular, C, H-spin-coupling constants over two and three bonds were used to differentiate between the various constitutional isomers and to establish the configuration of trisubstituted exocyclic C, C-double bonds
通过13 C-NMR研究了通过将乙炔二羧酸酯加到硫脲,环am和邻双官能化的芳族体系中得到的杂环化合物。特别地,在两个和三个键上的C,H-自旋偶联常数用于区分各种结构异构体并建立三取代的外环C,C-双键的构型。邻位顺式和反式C,H-spin偶联的构型意义和诊断价值在本系列中再次得到证明。