Beta-carboline alkaloids derived from the ascidian Synoicum sp.
摘要:
Six beta-carboline alkaloids (1-6) of the eudistomin Y class were isolated from the Korean ascidian Synoicum sp. These compounds were chemically converted to a known compound, eudistomin Y-1 (7) and six new derivatives, designated eudistomins Y-8-Y-13 (8-13). Several of these natural and synthetic compounds exhibited moderate to significant antimicrobial activity, weak cytotoxic activity, and inhibitory activities toward sortase A, isocitrate lyase, and Na+/K+-ATPase. Structure-activity relationships were also deduced. (C) 2012 Elsevier Ltd. All rights reserved.
Tandem iodine-mediated oxidations of tetrahydro-β-carbolines: total synthesis of eudistomins Y1–Y7
作者:Joseph D. Panarese、Stephen P. Waters
DOI:10.1039/c3ob40661j
日期:——
An efficient iodine-mediated oxidation of tetrahydro-β-carbolines is described to yield aromatic β-carboline products with tandem CâH oxidation. The utility of the method was demonstrated in total syntheses of the alkaloids eudistomins Y1âY7.
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.
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.