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 24, 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 24, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Monday, November 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Stray Dog Follows Adventure Racing Team for 6-Day Endurance Race

Stray Dog Follows Adventure Racing Team for 6-Day Endurance Race

Buzz60 (Nov. 24, 2014) — A Swedish Adventure racing team travels to try and win a world title, but comes home with something way better: a stray dog that joined the team for much of the grueling 430-mile race. Jen Markham has the story. Video provided by Buzz60
Powered by NewsLook.com
Red Panda Cubs Explore the Bratislava Zoo

Red Panda Cubs Explore the Bratislava Zoo

AFP (Nov. 24, 2014) — Four-month old Red Panda twins Pim and Pam still rely on their mother for breast milk at the Bratislava Zoo in Slovakia, but the precocious cubs have begun to branch out to solid foods, as well. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
Are Female Bosses More Likely To Be Depressed?

Are Female Bosses More Likely To Be Depressed?

Newsy (Nov. 24, 2014) — A new study links greater authority with increased depressive symptoms among women in the workplace. Video provided by Newsy
Powered by NewsLook.com
Winter Can Cause Depression — Here's How To Combat It

Winter Can Cause Depression — Here's How To Combat It

Newsy (Nov. 23, 2014) — Millions of American suffer from seasonal depression every year. It can lead to adverse health effects, but there are ways to ease symptoms. Video provided by Newsy
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