From the reaction between cystine and 2,5-dimethyl-4-hydroxy-3(2H)-furanone (DMHF) at 160 °C for 1/2 h at pH 2.4 in a closed system, 47 volatile components are identified including two novel compounds, 2,5-dimethyl-2,4-dihydroxy-3(2H)-thiophenone and 2,5-dimethyl-2-hydroxy-3(2H)-thiophenone. A comparison of the results of individual degradation products of cystine and DMHF under the same conditions revealed that the major reaction products were the two novel thiophenones, 2,5-dimethyl-4-hydroxy-3(2H)-thiophenone and 2,4-hexanedione. The formation mechanism of each of these products is proposed. The organoleptic properties of each novel thiophenone are also described.
All Science Journal Classification (ASJC) codes
- Agricultural and Biological Sciences(all)