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.
Multi‐birds with one stone: A cascade couplingstrategy was developed for the synthesis of β‐carbolines. The method can direct the synthesis of β‐carboline and isoquinoline‐containing natural products with high yields. Moreover, this protocol can also be further applied towards the totalsynthesis of natural products fascaplysin and papaverin (see scheme).
Total Syntheses of Eudistomins Y<sub>1</sub>-Y<sub>7</sub>by an Efficient One-Pot Process of Tandem Benzylic Oxidation and Aromatization of 1-Benzyl-3,4-dihydro-β-Carbolines
作者:Tien Ha Trieu、Jing Dong、Qiang Zhang、Bo Zheng、Tian-Zhuo Meng、Xia Lu、Xiao-Xin Shi
DOI:10.1002/ejoc.201300080
日期:2013.6
The first total synthesis of eudistomin Y7 (7) and totalsyntheses of eudistomins Y1–Y6 (1–6) are described. An efficient room-temperature conversion of 1-benzyl-3,4-dihydro-β-carbolines (11) into 1-benzoyl-β-carbolines (14) by a one-potprocess of tandembenzylicoxidation and aromatization as the key step of these totalsyntheses was also studied in detail.
Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles
作者:Shashikant U. Dighe、Surya K. Samanta、Shivalinga Kolle、Sanjay Batra
DOI:10.1016/j.tet.2017.03.031
日期:2017.4
iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminalalkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y1 and Y2. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives
一种有效的碘介导的二甲基亚砜(DMSO)中碘介导的氧化Pictet-Spengler反应,使用末端炔烃作为2-氧醛替代物来合成芳基(9 H-吡啶并[3,4- b ]吲哚-1-基)甲烷酮。描述。该方案的范围包括法西林蛋白酶,大黄素(Eusoditomins)Y 1和Y 2的总合成。该方法扩展了制备吡咯并[1,2- a ]-喹喔啉和吲哚并[1,5- a ]喹喔啉衍生物的方法。1-芳酰基-β-咔啉的实用性通过执行钯催化的β-咔啉直接邻位得到证明-C(sp2)-H使用DMSO作为来源和访问4-芳基-canthin-6-ones的硫代甲基(SMe)基团对苯环的官能化。
Total synthesis of Eudistomins Y1–Y6
作者:J. Phillip Kennedy、Micah L. Breininger、Craig W. Lindsley
DOI:10.1016/j.tetlet.2009.09.180
日期:2009.12
The first total synthesis of Eudistomins Y-1-Y-6, brominated phenolic beta-carboline marine metabolites with a unique benzoyl moiety at C1, have been prepared in three steps, utilizing MAOS, in overall yields ranging from 6% to 25%. (C) 2009 Elsevier Ltd. All rights reserved.