1427783-64-9Relevant articles and documents
Experimental NMR and MS study of benzoylguanidines. Investigation of E/Z isomerism
Santo, Rafael Dias Do Espirito,Simas, Rosineide Costa,Magalhaes, Alvicler,Santos, Vanessa Goncalves Dos,Regiani, Thais,Isler, Ana Cristina,Martins, Natiza Graziele,Eberlin, Marcos Nogueira,Gonzalez, Eduardo Rene Perez
, p. 315 - 321 (2013/05/09)
Molecules containing the guanidinic nuclei possess several pharmacological applications, and knowing the preferred isomers of a potential drug is important to understand the way it operates pharmacologically. Benzoylguanidines were synthesized in satisfactory to good yields and characterized by NMR, Electrospray Ionization Mass Spectrometry (ESI-MS) and Fourrier Transform InfraRed Spectroscopy techniques (FTIR). E/Z isomerism of the guanidines was studied and confirmed by NMR analysis in solution (1H-13C Heteronuclear Single Quantum Coherence (HSQC) and Heteronuclear Multiple-Bond Correlation (HMBC), 1H-15N HMBC, 1H- 1H Correlation Spectroscopy (COSY) and Nuclear Overhauser Effect Spectroscopy (NOESY) experiments) at low temperatures. Compounds with p-Cl and p-Br aniline moiety exist mainly as Z isomer with a small proportion of E isomer, whereas compounds with p-NO2 moiety showed a decrease in proportion of isomer Z. The results are important for the application of these molecules as enzymatic inhibitors. Copyright