Liu, Fei et al. published their research in Chaye Kexue in 2016 | CAS: 3528-58-3

1-Ethyl-1H-pyrazol-5-amine (cas: 3528-58-3) belongs to pyrazole derivatives. As is the case with imidazoles, the pyrazole ring offers many opportunities to create new multiring systems that incorporate this heterocycle. Protonation of pyrazole in strong acid leads to pyrazolium cations, which undergo electrophilic substitution preferentially at C3 rather than C4. The pyrazole anion is not reactive toward nucleophiles but is mostly reactive to electrophiles.Category: pyrazoles-derivatives

Study on effect of fungal-fermentation process on flavor quality in white tea was written by Liu, Fei;Xue, Zhihui;Ye, Qianlin;Sun, Weijiang. And the article was included in Chaye Kexue in 2016.Category: pyrazoles-derivatives This article mentions the following:

Baimudan and Shoumei were utilized to study the effect of fungal-fermentation process on flavor quality. Sensory evaluation found new flavors in white tea after fermentation The quality of Shoumei was improved significantly after fermentation The aroma of white tea changed from clean and fresh to pure and mellow during fermentation, which was due to the decrease of fresh odorants and increase of aged fragrant. The taste changed from astringent and harsh to aged and soft, which was attributing to the decrease of esters-catechins by 2.3 and 0.69 percent, resp., and theaflavin by 33% and 43% in Baimudan and Shoumei, resp. The taste of fermented Baimudan was a little bitter because caffeine increased significantly. The ratio of essential amino acids to nonessential amino acids increased from 36.10% to 39.84% in Baimudan and 42.16% to 62.32% in Shoumei. Therefore, fungal fermentation could largely improve the value of low or middle-grade white tea. In summary, the impacts of fungal fermentation on quality of Shoumei were larger than that of Baimudan, which was of great significance to improve the quality of low grade white tea. In the experiment, the researchers used many compounds, for example, 1-Ethyl-1H-pyrazol-5-amine (cas: 3528-58-3Category: pyrazoles-derivatives).

1-Ethyl-1H-pyrazol-5-amine (cas: 3528-58-3) belongs to pyrazole derivatives. As is the case with imidazoles, the pyrazole ring offers many opportunities to create new multiring systems that incorporate this heterocycle. Protonation of pyrazole in strong acid leads to pyrazolium cations, which undergo electrophilic substitution preferentially at C3 rather than C4. The pyrazole anion is not reactive toward nucleophiles but is mostly reactive to electrophiles.Category: pyrazoles-derivatives

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics