Das Sempervirin C19H16N2, aus Gelsemium sempervirens, Ait., wurde durch Erhitzen rnit Selen in das Yobyrin (IT) übergefuhrt. Durch Kochen rnit Raney-Nickel in Xylol liefert das Sempervirin das „Tetrahydro-ycbyrin” (IV). Auf Grund seines chemischen Verhaltens und seines Absorptionsspektrums wird fur das Sempervirin die Formel 1 vorgeschlagen.
通过与硒一起加热,将来自美国伊利诺伊州格森姆维尔森州的森巴韦林C 19 H 16 N 2转化为yobyrin(IT)。通过将阮内镍与二甲苯中的阮内醇一起沸腾,森伯韦林产生“四羟基拜林”(IV)。根据其化学行为和吸收光谱,建议使用sempervirin的式1。
Witkop, Justus Liebigs Annalen der Chemie, 1943, vol. 554, p. 118
作者:Witkop
DOI:——
日期:——
Synthesis, in vitro anti-inflammatory and cytotoxic evaluation, and mechanism of action studies of 1-benzoyl-β-carboline and 1-benzoyl-3-carboxy-β-carboline derivatives
In the present study, various 1-substituted and 1,3-disubstituted beta-carboline derivatives were synthesized by a modified single-step Pictet-Spengler reaction. The compounds were examined for cytotoxicity and anti-inflammatory activity, as measured by the inhibition of prostaglandin E-2 (PGE(2)) production and nitric oxide (NO) production. While only two compounds (28 and 31) showed marginal cytotoxicity against four human cancer cell lines, most of the tested compounds exhibited potent inhibitory activity of both NO and PGE(2) production. Moreover, compounds 6 and 16 significantly reduced the expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase 2 (COX2), suggesting that beta-carboline analogs can inhibit NO and PGE(2) production at the translational level. In addition, several of the beta-carboline derivatives (1, 2, 48, 11, 13, 22, 25, 27, 31, and 41-43) displayed significant inhibitory activity of superoxide anion (O-2(center dot-)) generation or elastase release compared to the reference compound, with 6 being the most potent. N-Formyl-L-methionyl-phenylalanine (FMLP)-induced phosphorylation of c-Jun N-terminal kinase (JNK) and protein kinase B (AKT) were also inhibited by 6, suggesting that it suppresses human neutrophil functions by inhibiting the activation of JNK and AKT signaling pathways. Therefore, the synthetic 1-benzoyl-3-carboxy beta-carboline analogs may have great potential to be developed as anti-inflammatory agents. (C) 2011 Elsevier Ltd. All rights reserved.
Chatterjee; Pakrashi, Journal of the Indian Chemical Society, 1954, vol. 31, p. 31