The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2-Ethylpyrazine( cas:13925-00-3 ) is researched.Category: chiral-catalyst.Procida, Giuseppe; Lagazio, Corrado; Cateni, Francesca; Zacchigna, Marina; Cichelli, Angelo published the article 《Characterization of Arabica and Robusta volatile coffees composition by reverse carrier gas headspace gas chromatography-mass spectrometry based on a statistical approach》 about this compound( cas:13925-00-3 ) in Food Science and Biotechnology. Keywords: Coffea volatile compoundd chem composition gas chromatog mass spectrometry; Arabica and Robusta coffee; Dynamic head space; GC–MS; Green and roasted coffee; Volatile compound. Let’s learn more about this compound (cas:13925-00-3).
Nineteen samples of Arabica and 14 of Robusta coming from various plantation were analyzed by dynamic headspace capillary gas chromatog.-mass spectrometry to characterize the volatile fraction of green and roasted samples and the relationships of the same species with geog. origin. As concerns green beans, Arabica species appear characterized by high content of n-hexanol, furfural and amylformate, while Robusta species by greater content of ethylpyrazine, dimethylsulfone and 2-heptanone. Four variables, 4-methyl-2,3-dihydrofuran, n-hexanol, limonene and nonanal, appear involved in the characterization of the geog. origin of the analyzed samples. The volatile fraction of the roasted Arabica samples, appear characterized by high content of pyridine, diacetyl, propylformate, acetone and 2,3-pentanedione, while Robusta samples by high content of methylbutyrate, 2,3-dimethylpyrazine and 3-hexanone. Considering geog. origin of the analyzed samples, four compounds appear involved, in particular 2-butanone, methylbutyrate, methanol and ethylformate. Very accurate (error rate lower than 5%) rules to classify samples as Arabica or Robusta according to their compounds profile were developed.
In some applications, this compound(13925-00-3)Category: chiral-catalyst is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.