Premium
Carbon‐13 chemical shifts assignment of ( E )‐styryluracits. ( E )‐styrylthiouracils and ( E )‐3‐oxothiazolo[3,2‐a]‐6‐styryl‐pyrimidin‐5‐ones
Author(s) -
Łapucha Andrzej,
Wyrzykiewicz Elzbieta
Publication year - 1987
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260250516
Subject(s) - chemistry , chemical shift , carbon 13 nmr , thio , spectral line , stereochemistry , computational chemistry , physics , astronomy
The 13 C NMR spectra of nine isomeric ( E )‐styryluracils and ( E )‐styrylthiouracils and those of five ( E )‐3‐oxothiazolo[3,2‐ a ]‐6‐styrylpyrimidin‐5‐ones have been fully assigned. The A i and A i K empirical parameters of p ‐ and m ‐hydroxystyryl, p ‐N,N‐diethylaminostyryl, 5‐ and 6‐vinyl02,4‐diketopyrimidyl, 5‐ and 6‐vinyl‐2‐thio‐4‐ketopyrimidyl and 3‐oxothiazolo[3,2‐ a ]‐6‐vinyl‐5‐ketopyrimidyl groups were calculated for the prediction of the chemical shifts of substituted ( E )‐styryluracils and ( E )‐3‐oxothiazolo[3,2‐ a ]styrylpyrimidin‐5‐ones.