Abstrakt: |
C NMR spectra (20 and 75 MHz, in DMSO-d) of a series of 1,3-diaryl-3-(1 H-1,2,4-triazol-1-yl)- and 1,3-diaryl-2-(1 H-1,2,4-triazol-1-yl)prop-2-en-1-ones were registered. It was shown that the chemical shifts of both the carbon atom of the alkene group and C(3) reflect regio- and stereoisomerism of these compounds. Taking this into account the isomeric structures of several 1,3-diaryl-3-(1 H-1,2,4-triazol-1-yl)prop-2-en-1-ones were identified and the configurations relative to the double bond of a number of 1,3-diaryl-2-(1 H-1,2,4-triazol-1-yl)prop-2-en-1-ones were determined. [ABSTRACT FROM AUTHOR] |