Fourteen substituted α-phenylcinnamic acids were prepared by classical Perkin condensation reaction. The configuration of α- phenylcinnamic acids was determined by the NOE difference spectra. A plausible way of cleavage was involved in the formation of the specific fragment peaks in the MS of the α-phenylcinnamic acids. The characteristic chemical shift of the olefinic proton in ^1H NMR is also discussed.

Key words: BENZENE P, CINNAMIC ACID P, MASS SPECTROGRAPHY, CHEMICAL SHIFT, NMR SPECTROMETRY, SPECTROGRAPHIC ANALYSIS