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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.

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

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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