Structure Revision of Penipacids A–E Reveals a Putative New Cryptic Natural Product, N-aminoanthranilic Acid, with Potential as a Transcriptional Regulator of Silent Secondary Metabolism
作者:Zeinab G. Khalil、Sarani Kankanamge、Robert J. Capon
DOI:10.3390/md20060339
日期:——
they may also be artifact Schiff base adducts of 11 and the media constituents pyruvic acid and furfural, respectively. A review of the natural products literature revealed other Schiff base (hydrazone) natural products that might also be viewed as Schiff base adduct artifacts of 11. Having raised the prospect that 11 is an undetected and reactive cryptic natural product, we went on to establish that
重新考虑青霉酸 A-E 的光谱数据,2013 年首次报道为来自华南深海沉积物衍生真菌 Penicillium paneum SD-44 的无环脒1-5,促使全合成结构修订为腙6-10 . 本次修订强烈支持这样的命题,即青霉素 A-B ( 6-7 )是神秘的(未检测到的)天然产物N-氨基邻氨基苯甲酸 ( 11 ) 与双丙酮醇的人工希夫碱加合物,这是由于在酸性条件下过度暴露于丙酮和甲醇而引起的。处理条件。同样,修正后的青霉素 C-D 结构(8 - 9 ) 和 E ( 10 ) 提出了它们也可能分别是11和介质成分丙酮酸和糠醛的人工席夫碱加合物的可能性。对天然产物文献的回顾揭示了其他席夫碱(腙)天然产物,它们也可能被视为11的席夫碱加合物产物。在提出11是一种未被检测到且具有反应性的神秘天然产物的前景之后,我们继续确定11对一系列细菌、真菌或哺乳动物(人类)细胞类型没有细胞毒性。相反,当作为微生