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CATKERB SIGNED

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

Total Cost €

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EC-Contrib. €

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Partnership

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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.

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

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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