Characterization of important sulfur and nitrogen compounds in Lang baijiu by application of gas chromatography-olfactometry, flame photometric detection, nitrogen phosphorus detector and odor activity value was written by Zhu, Jian Cai;Niu, Yun Wei;Xiao, Zuo Bing. And the article was included in Food Research International in 2020.Application In Synthesis of Isopentyl hexanoate The following contents are mentioned in the article:
The volatile compounds in three Lang baijiu (“Honghualangshi, Y1”, “Langjiulangge, Y2”, and “Laolangjiu, Y3”) were identified by GC-O, GC-MS, flame photometric detection (FPD), and nitrogen phosphorus detector (NPD) with the aid of stir bar sorptive extraction (SBSE). The results showed that a total of 60, 62, and 61 compounds with aroma contribution were present in samples Y1, Y2, and Y3, resp. The results indicated that 2-methyl-3-furanthiol (OAV: 20-30), 3-mercaporhexyl acetate (OAV: 13-20), β-damascenone (OAV: 30-57), (E)-2-nonenal (OAV: 9-22), heptanal (OAV: 4-13), hexanal (OAV: 9-12) and 2-isopropyl-3-methoxypyrazine (OAV: 4-14) contributed to the aroma of Lang baijiu. Finally, six compounds (Et hexanoate, 2-methyl-3-furanthiol, (E)-2-decenal, guaiacol, 3-mercaporhexyl acetate, and 2-isopropyl-3-methoxypyrazine) with different OAVs were used to determine the effect on the threshold of aromatic reconstitution (AR). It can be seen that Et hexanoate, 2-methyl-3-furanthiol, 3-mercaporhexyl acetate, and 2-isopropyl-3-methoxypyrazine could significantly decrease the threshold of AR. The possible reason was that these four compounds had synergistic effects with the aroma compounds in AR. Compared to Et hexanoate and 2-methyl-3-furanthiol, the threshold of AR had a slight difference in the presence of (E)-2-decenal in AR. After the addition of guaiacol, the threshold value of AR was significantly increased, indicating a masking effect between guaiacol and the original aroma compounds in AR. This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Application In Synthesis of Isopentyl hexanoate).
Isopentyl hexanoate (cas: 2198-61-0) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Application In Synthesis of Isopentyl hexanoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics