Total synthesis of the marine sponge pigment fascaplysin
作者:Benjamin Pelcman、Gordon W Gribble
DOI:10.1016/s0040-4039(00)97367-2
日期:——
Fascaplysin (1), an antimicrobial and cytotoxic red pigmentfrom the marinespongeFascaplysinopsissp., has been synthesized in seven steps from indole (65% yield). The pivotal intermediate in the synthesis is diindole 3 which is induced to undergo acid-catalyzed cyclization and dehydrogenation to afford the desired pentacycle 2 in > 90% yield. Peracid oxidation of 2 yields fascaplysin.
An unexpected rearrangement of 3-unsubstituted-2-acyl substituted indole phenylhydrazones. A new method for benz[c]β-carboline synthesis
作者:Olga V. Baranova、Sergey V. Dubovitskii
DOI:10.1016/j.tetlet.2003.11.059
日期:2004.2
A new type of rearrangement of 3-unsubstituted-2-acyl substituted indole phenylhydrazones with formation of a quinoline ring under acid catalysed conditions was observed.
观察到一种新型的3-未取代的-2-酰基取代的吲哚苯基hydr的重排,在酸催化条件下形成喹啉环。
PELCMAN, BENJAMIN;GRIBBLE, GORDON W., TETRAHEDRON LETT., 31,(1990) N7, C. 2381-2384
作者:PELCMAN, BENJAMIN、GRIBBLE, GORDON W.
DOI:——
日期:——
Total syntheses of the marine sponge pigments fascaplysin and homofascaplysin B and C
作者:Gordon W. Gribble、Benjamin Pelcman
DOI:10.1021/jo00039a024
日期:1992.6
The Fascaplysinopsis spp. marine sponge pigments fascaplysin (1), homofascaplysin B (4), and homofascaplysin C (5) have been synthesized by peracid oxidation, reaction with oxalyl chloride/methanol, or Vilsmeier formylation, respectively, of the keystone intermediate 12H-pyrido[1,2-a:3,4-b']diindole (7). The versatile 7 was prepared from indole (17) in six steps (78% yield), a sequence in which the key reaction is the trifluoroacetic acid-induced ring closure of diindole 15, followed by Pd/C-catalyzed dehydrogenation of the crude mixture of cyclized products 25, 26, to give 7 in 93% yield from 15.
A new method for the synthesis of the marine alkaloid fascaplysin
作者:Maxim E. Zhidkov、Olga V. Baranova、Natalya S. Kravchenko、Sergey V. Dubovitskii
DOI:10.1016/j.tetlet.2010.09.120
日期:2010.12
A new method for the synthesis of the marine alkaloid fascaplysin has been developed via a simple and practical approach to pyrido[1,2-a:3,4-b′]diindole ring system formation. Conversion of the marine alkaloid homofascaplysinC into fascaplysin is also described.
通过简单实用的方法,开发了吡啶并[1,2- a:3,4- b ']二吲哚环系统形成的新方法,用于合成海洋生物碱法丝溶素。还描述了将海洋生物碱高法丝溶素C转化为法丝溶素。