The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: (S)-3-(Piperidin-2-yl)pyridine( cas:494-52-0 ) is researched.Computed Properties of C10H14N2.Deng, Yige; Ding, Songshuang; Zhu, Jiaming; Tian, Yuli; Qiao, Baoming; Shi, Xiangdong published the article 《Effect of drying density on change of main nitrogen compounds in drying process of cigar tobacco》 about this compound( cas:494-52-0 ) in Zhongguo Nongye Keji Daobao. Keywords: drying nitrogen compound cigar tobacco. Let’s learn more about this compound (cas:494-52-0).
In order to fully grasp the changes of nitrogen metabolites during the drying process of cigar tobacco leaves, to formulate a reasonable modulation process, the cigar tobacco variety ′Gu-5′ was used as material to study the effects of different air-drying densities (40, 60 and 80 pieces·rod-1) on the changes of the main nitrogen compounds in cigar tobacco leaves. The results showed that, under different air-drying densities, the changing trends of various nitrogen-containing compounds in tobacco leaves were basically consistent. Among them, the change of total nitrogen content showed a “”bimodal curve””, and the total nitrogen content was the lowest at the end of air-drying; soluble protein degradation mainly occurred during the wilting phase and the yellowing phase, and the accumulation of amino acids proceeded with protein degradation simultaneously, showing a “”fast-slow-fast”” variation trend; the total alkaloid content decreased slightly; nitrate did not change much between before and after air-drying. Among different air-drying densities, total nitrogen, protein and alkaloids of tobacco leaves were degraded the fastest under the treatment of 40 pieces·rod-1, and the three chem. components all reached the lowest value at 25 d after air-drying; amino acids content was fully accumulated during air-drying process and eventually reached 7.61 mg·g-1; its nitrate content was always the lowest during the whole air-drying process. Taken together, the drying d. of 40 pieces·rod-1 was more conducive to improving the quality and industrial availability of cigar tobacco leaves.
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Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI