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CATKERB SIGNED

Total Syntheses of Catharanthine and Keramaphidin B by an Iridium-Catalyzed Reductive Cyclization Cascade

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EC-Contrib. €

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 CATKERB project word cloud

Explore the words cloud of the CATKERB project. It provides you a very rough idea of what is the project "CATKERB" about.

indoline    comprising    keramaphidin    dienes    humans    stereogenic    natural    usually    group    ml    substrate    iridium    cytotoxicity    during    alder    centers    perfect    lewis    acids    unbridged    azabicyclo    intended    fellowship    dimeric    leukaemia    alkaloid    class    family    precursor    proof    dixon    chiral    diels    mice    scope    clinically    stage    electron    additional    cancer    bridged    kb    motif    mu    transformation    piperidine    structural    ic50    valuable    feasibility    structurally    agents    dihydropyridinones    methodology    microtubules    moiety    corresponding    direct    compound    alkaloids    double    cascade    ing    triple    first    treatment    total    epidermal    amine    catharanthus    42    bond    catalysts    reaction    consists    powerful    octene    varying    catharanthine       solvent    cycloaddition    acid    vinblastine    reductive    quaternary    iboga    cyclization    substituted    inhibit    p388    indole    catalyzed    macrocycles    configured    temperature    time    mitosis    marine    enantioselective    cells    shows    manzamine    course    pentacyclic    vincristine    belongs    variant    suitable    optimization    subsequent    28    establishing    syntheses    carry    rings   

Project "CATKERB" data sheet

The following table provides information about the project.

Coordinator
THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD 

Organization address
address: WELLINGTON SQUARE UNIVERSITY OFFICES
city: OXFORD
postcode: OX1 2JD
website: www.ox.ac.uk

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Total cost 212˙933 €
 EC max contribution 212˙933 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2019
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2020
 Duration (year-month-day) from 2020-06-01   to  2022-05-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD UK (OXFORD) coordinator 212˙933.00

Map

 Project objective

During the course of this Fellowship a reductive cyclization cascade for dihydropyridinones, which consists of an iridium-catalyzed reduction to the corresponding electron-rich dienes and subsequent [42] cycloaddition (Diels-Alder reaction) will be developed. A first promising proof of concept study establishing the feasibility of this powerful transformation has already been carried out in the Dixon group; however further optimization by varying the solvent, the reaction time, the temperature or by using suitable Lewis acids is required to perfect the methodology. The additional use of chiral Lewis acid or chiral amine catalysts is also intended to develop an enantioselective variant of this method. The methodology development should then be completed by determining the substrate scope. The resulting azabicyclo[2.2.2]octene motif is an important structural component of various alkaloids. Therefore, this reaction cascade should then be used as a late stage key step in the total syntheses of the natural products catharanthine and keramaphidin B.

Catharanthine is an important member of the large class of iboga alkaloids, which usually carry as common structural feature an indole or an indoline moiety. Catharanthine can be considered as a direct precursor of the dimeric Catharanthus alkaloids vinblastine and vincristine, both of which are clinically valuable agents in the treatment of cancer due to their ability to inhibit mitosis the formation of microtubules.

The marine alkaloid keramaphidin B belongs to the manzamine family and shows cytotoxicity against P388 leukaemia cells in mice (IC50 0.28 μg/mL) and against epidermal KB cancer cells in humans (IC50 0.30 μg/mL). Structurally, keramaphidin B is a pentacyclic compound comprising two piperidine rings (one bridged and one unbridged) and two macrocycles. Furthermore, this alkaloid has two (Z)-configured and one triple-substituted double bond, as well as four stereogenic centers, one of which is quaternary.

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The information about "CATKERB" are provided by the European Opendata Portal: CORDIS opendata.

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