Eudistomin Y class compounds are a series of β-carbolines which was originally isolated from a marine turnicate or ascidian near the South Korea Sea. These compounds contain bromo-substituted groups, which is one of the typical characters of marine natural products. We report herein the chemical synthesis and biological evaluation of seven new β-carboline-based metabolites, Eudistomins Y1–Y7, and their hydroxyl-methylated phenyl derivatives. Using bromo-substituted tryptamines and bromo-substituted phenylglyoxals as the key intermediates, Eudistomins Y1–Y7 and their derivatives were synthesized via the acid-catalyzed Pictet-Spengler reaction and fully characterized by 1H- and 13C-NMR and mass spectroscopy. Biological studies revealed that all of the compounds showed moderate growth inhibitory activity against breast carcinoma cell line MDA-231 with IC50 of 15–63 μM and the inhibitory activities of hydroxyl-methylated phenyl products were higher than that of the corresponding natural products Eudistomins Y1–Y7.
优迪斯托明Y类化合物是一系列β-咔啉,最初从韩国南海附近的海鞘中分离出来。这些化合物含有
溴取代基,这是海洋
天然产物的典型特征之一。我们在此报道了七种新的基于β-咔啉的代谢物,即优迪斯托明Y1至Y7及其羟甲基化苯基衍
生物的
化学合成与
生物学评价。利用
溴取代
色胺和
溴取代苯基
甘油醛作为关键中间体,通过酸催化的皮克特-斯彭格勒反应合成了优迪斯托明Y1至Y7及其衍
生物,并通过1H和13C核磁共振及质谱进行了全面表征。
生物学研究表明,所有化合物对乳腺癌
细胞系MDA-231均显示出中等的生长抑制活性,IC50值在15至63μM之间,且羟甲基化苯基产品的抑制活性高于相应的
天然产物优迪斯托明Y1至Y7。