Leucophyl | Total Synthesis of Leucophyllidine

Summary
In the frame of this research program, carried out at the Institute of Molecular Sciences (ISM) at the University of Bordeaux (UB), we propose a strategy directed towards the first total synthesis of leucophyllidine, a cytotoxic alkaloid recently isolated from L. griffithii. From the retrosynthetic analysis of the target, two fragments where identified that will be prepared then connected in the last stage of the synthesis, following a biomimetic approach. The “North-fragment” will be synthesized relying on a coupling between a key-aldehyde moiety and tryptamine through a Pictet-Spengler reaction/lactamization cascade. The “South-fragment” will be elaborated using a Friedländer-type condensation between a piperidinone, and an ortho-aminobenzonitrile. The key-aldehyde and the piperidinone will be elaborated using a unified strategy, including a novel stereoselective free-radical carbo-oximation process, which will install quaternary centers present in North and South fragments. Incorporation of the vinyl motif on the naphthyridine ring, through a Suzuki coupling, should complete the synthesis of the south-fragment. Both fragments will finally be connected, following a biomimetic Mannich-type strategy, which should provide sufficient quantities of this potent anticancer agent and analogues for future biological screening. Key objectives of this research program are the development of an access to new plant anticancer drugs for potential clinical use and the training of future leading experts in the field of natural product–derived drugs discovery, a domain in which Europe must remain competitive in the 21st century as cancer-related diseases are rapidly increasing with population’s life expectancy.
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Web resources: https://cordis.europa.eu/project/id/655527
Start date: 15-12-2015
End date: 14-12-2017
Total budget - Public funding: 185 076,00 Euro - 185 076,00 Euro
Cordis data

Original description

In the frame of this research program, carried out at the Institute of Molecular Sciences (ISM) at the University of Bordeaux (UB), we propose a strategy directed towards the first total synthesis of leucophyllidine, a cytotoxic alkaloid recently isolated from L. griffithii. From the retrosynthetic analysis of the target, two fragments where identified that will be prepared then connected in the last stage of the synthesis, following a biomimetic approach. The “North-fragment” will be synthesized relying on a coupling between a key-aldehyde moiety and tryptamine through a Pictet-Spengler reaction/lactamization cascade. The “South-fragment” will be elaborated using a Friedländer-type condensation between a piperidinone, and an ortho-aminobenzonitrile. The key-aldehyde and the piperidinone will be elaborated using a unified strategy, including a novel stereoselective free-radical carbo-oximation process, which will install quaternary centers present in North and South fragments. Incorporation of the vinyl motif on the naphthyridine ring, through a Suzuki coupling, should complete the synthesis of the south-fragment. Both fragments will finally be connected, following a biomimetic Mannich-type strategy, which should provide sufficient quantities of this potent anticancer agent and analogues for future biological screening. Key objectives of this research program are the development of an access to new plant anticancer drugs for potential clinical use and the training of future leading experts in the field of natural product–derived drugs discovery, a domain in which Europe must remain competitive in the 21st century as cancer-related diseases are rapidly increasing with population’s life expectancy.

Status

CLOSED

Call topic

MSCA-IF-2014-EF

Update Date

28-04-2024
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Horizon 2020
H2020-EU.1. EXCELLENT SCIENCE
H2020-EU.1.3. EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions (MSCA)
H2020-EU.1.3.2. Nurturing excellence by means of cross-border and cross-sector mobility
H2020-MSCA-IF-2014
MSCA-IF-2014-EF Marie Skłodowska-Curie Individual Fellowships (IF-EF)