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 acetylenedicarboxylicacidesters 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