Reaction flavors ammonium sulfide

Ammonium sulfide, reaction with aldehydes with and without acetoin, 36-54 Animal fat, role in flavor of cook meat, 118... 

Similar reactions have been used to generate pleasant pork notes from the reaction of natural Isovaleraldehyde and natural Ammonium Sulfide, as shown in the following figure. The chemistry of this pork flavor formulation has been the subject of several patents and numerous publications (equation 13). 

Formation of Flavor Compounds by the Reactions of Carbonyls and Ammonium Sulfide under Low Temperature... 

In the reaction of 2,3-butanedione and ammonium sulfide at 25 °C, quantitation of volatile compoimds identified in the reaction is summarized in Table II. A pair of interesting intermediate compounds, 5-hydroxy-3-thiazolines, were tentatively identified by GC/MS-EI. 5-Hydroxy-2,4,5-trimethyl-3-thiazolines have been separated and identified by GC/MS-EI and NMR in the early study of volatile flavor conq)ounds of yeast extracts (S). They were also found in the reaction of 2,3-butanedione or 2,3-pentanedione with acetaldehyde, hydrogen sulfide and ammonia (2). 

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