A new odorless one-pot synthesis of thioesters and selenoesters promoted by Rongalite
Rongalite promotes cleavage of diaryl disulfides generating chalcogenolate anions that then undergo facile acylation with anhydrides in the presence of CsF to afford thioesters (3) with good to excellent yields. By using the present protocol, 5-arylthio-5-oxopentanoic acid (4) can be facilely prepared. The important features of the methodology are broad substrate scope, simple operation, and no requirement for metal catalysts. It is noteworthy that acylations of diphenyl diselane with anhydrides are also conducted smoothly to afford selenoesters (5) in good yields under the standard conditions.
Dan, Weixing,Deng, Hongjuan,Chen, Jiuxi,Liu, Miaochang,Ding, Jinchang,Wu, Huayue
experimental part
p. 7384 - 7388
(2010/10/02)
Sulfur-Containing Furans in Commercial Meat Flavorings
The volatiles of eight commercially available meat flavorings were enriched by dynamic headspace extraction.The resulting aroma extracts were analyzed by high-resolution gas chromatography and gas chromatography/mass spectrometry (GC/MS).Among the compounds identified were 16 sulfur-containing furans. 2-Methyl-3-(ethyldithio)furan, 1--2-propanone, and the spectroscopic data of 3--2-butanone, 2--3-pentanone and 3--2-pentanone are reported here for the first time.Possible formation pathways are discussed.Keywords: Processed meat flavorings; dynamic headspace analysis; aroma chemicals; sulfur-containing furans
Ruther, Joachim,Baltes, Werner
p. 2254 - 2259
(2007/10/02)
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