Lovro Selič, Branko Stanovnik, Simona Golič Gradolnik
Faculty of Chemistry and Ch mical Technology, University of Ljubljana, Aškerceva , 1000 Ljubljana,
Slovenia
L01, Department of NMR and Molecular Modeling, National Institute of Chemistry, Hajdrihova 19,
1000 Ljubljana, Slovenia
 

ABSTRACT

Two structural issues, orientation on enamino double bond and relative positions of
substituents on 3-amino group, on a series of 3-(2,2-disubstituted ethenyl)amino-substituted
heterocycles, such as 4H-pyrido-[1,2-a]pyrimidin-4-ones 3, 5H-thiazolo[3,2-a]
pyrimidin-5-ones 4, 4H-pyrido[1,2-a]pyridin-4-ones 5, 5,6,7,8-tetrahydro-2H-1-
benzopyran-2-ones 6 and 2H-1-benzopyran-2-ones 7, were resolved using basic 1 H NMR
experiments.