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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.

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

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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