Featured Research

from universities, journals, and other organizations

First total synthesis of madangamine D, a molecule of biomedical interest

Date:
July 22, 2014
Source:
Universidad de Barcelona
Summary:
Madangamines are a group of polycyclic alkaloids from marine sponges which have biomedical interest due to their cytotoxic activity. Chemists have now completed the first total synthesis of madangamine D, a scientific discovery in the field of organic chemistry.

This is the first total synthesis of a sponge isolated marine alkaloid with complex structure.
Credit: Image courtesy of Universidad de Barcelona

Madangamines are a group of polycyclic alkaloids from marine sponges which have biomedical interest due to their cytotoxic activity. A research group from the University of Barcelona (UB) has just described in a paper published in the journal Angewandte Chemie International Edition the first total synthesis of madangamine D, a scientific discovery in the field of organic chemistry. The paper, which represents the first total synthesis of an alkaloid of the madangamine group, is authored by Joan Bosch, Mercedes Amat, Roberto Ballette, Maria Pιrez, and Stefano Proto, from the Organic Chemistry Laboratory of the Faculty of Pharmacy and the Institute of Biomedicine of UB (IBUB).

Related Articles


Marine molecules of biomedical interest

Sponges are a group of marine organisms rich in bioactive products. However, it is usually very difficult to develop in-depth studies about their biological activity because they contain isolated small quantities of these products. Madangamines A and F have shown significant cytotoxicity against a number of tumour cell lines. In the study, madangamine D showed significant in vitro cytotoxic activity against human colon and pancreas cancer cell lines.

To successfully accomplish the synthesis of madangamine D, experts use the knowledge attained by the UB research group in order to use phenylglycinol-derived bicyclic lactams in the enantioselective synthesis of piperidine-containing alkaloids. By using this type of lactam, the diazatricyclic ABC core, common to all madangamines, was synthetized in a completely stereocontrolled way. Once the core is obtained, madangamine D macrocyclic rings are elaborated.

A 27-phase synthesis process

This is the first total synthesis of a sponge isolated marine alkaloid with complex structure. The synthesis has enabled for the first having a pure sample of this natural product, as when it was isolated, in really small quantities, madangamine D was not pure as it was mixed with other alkaloid of the same group (madangamine E). Consequently, the UB research group was able to carry out bioactivity assays. Furthermore, enantioselective synthesis enabled to prove the configuration of this alkaloid family.

Besides difficulties inherent in a synthetic process with a high number of synthesis phases -- 27 in this case -- , the most difficult phases are the stereoselective formation of stereo cores present in the natural product and the alkaloid's construction of macrocyclic rings.

A scientific milestone in the field of organic synthesis

Authors explain that "it is an unprecedented synthesis process of alkaloids of the madangamine group. Previous preparations of diazatricyclic ABC core of these alkaloids were done, but in racemic series and, in most cases, without the functionality needed to build macrocyclic rings later." In fact, the first enantioselective synthesis of the diazatricyclic ABC core of madangamines with adequate functionality to access these natural products was described in 2010 by the UB research group, which is part of the Research and Development Center of Organic Synthesis for Chemical and Pharmaceutical Companies (SINTEFARMA). More recently, the UB research group developed its own methodology to synthetize other alkaloids of this group of molecules by means of a common intermediate.


Story Source:

The above story is based on materials provided by Universidad de Barcelona. Note: Materials may be edited for content and length.


Journal Reference:

  1. Roberto Ballette, Maria Pιrez, Stefano Proto, Mercedes Amat, Joan Bosch. Total Synthesis of ( )-Madangamine D. Angewandte Chemie International Edition, 2014; 53 (24): 6202 DOI: 10.1002/anie.201402263

Cite This Page:

Universidad de Barcelona. "First total synthesis of madangamine D, a molecule of biomedical interest." ScienceDaily. ScienceDaily, 22 July 2014. <www.sciencedaily.com/releases/2014/07/140722091421.htm>.
Universidad de Barcelona. (2014, July 22). First total synthesis of madangamine D, a molecule of biomedical interest. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2014/07/140722091421.htm
Universidad de Barcelona. "First total synthesis of madangamine D, a molecule of biomedical interest." ScienceDaily. www.sciencedaily.com/releases/2014/07/140722091421.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Classic Hollywood Memorabilia Goes Under the Hammer

Classic Hollywood Memorabilia Goes Under the Hammer

Reuters - Entertainment Video Online (Nov. 26, 2014) — The iconic piano from "Casablanca" and the Cowardly Lion suit from "The Wizard of Oz" fetch millions at auction. Sara Hemrajani reports. Video provided by Reuters
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) — Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) — The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. Video provided by Newsy
Powered by NewsLook.com
Feast Your Eyes: Lamb Chop Sent Into Space from UK

Feast Your Eyes: Lamb Chop Sent Into Space from UK

Reuters - Light News Video Online (Nov. 25, 2014) — Take a stab at this -- stunt video shows a lamb chop's journey from an east London restaurant over 30 kilometers into space. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins