Bellen, a premium CRO, CDMO, CMO at the cutting edge of Heterocyclic Chemistry

Bellen is a manufacturer, highly focused on heterocyclic chemistry, with a specific expertise in isoquinolines and indazoles. Our range of products and services are dedicated to the Pharmaceutical and Agrochemical industries.

Bellen can supply either intermediates to build your screening libraries, or fragments and analogues.

Bellen can accompany your projects from early Research stages to Manufacturing and Supply Chain optimization.

4 you

Discover how Bellen can help you reaching your goals.
Whatever concerns you may have : give access to innovative compounds to your chemists, optimize your supply chain, outsource part of your research and development to increase your flexibility, secure your sourcing of raw materials, Bellen can bring you the reliable support you’re looking for.

Our value proposition


Independent ownership allows a short and agile decision-making cycle.


Use your time and resources to concentrate on doing things Bellen cannot do for you.
Our highly skilled team is dedicated to your success.


State-of-the-art heterocyclic chemistry, supported by a strong R&D team.

Our Offer - picture

Bellen works with the major Pharmaceutical Companies, meeting their high level of expectations (compliance, EHS, quality assurance).

Bellen is well-known and recognized for its know-how, quality of service and reliability.


– Catalogue
Innovative compounds available through our distributors worldwide.

Custom synthesis, libraries, Medchem support, FTE.

Kilo-lab, process R&D, route optimization, FTE .

Non-GMP manufacturing of advanced intermediates
GMP manufacturing capabilities ready by 2019.

  • Medchem & DevelopmentMedchem & Development
  • Whole Scale Custom synthesisWhole Scale Custom synthesis
  • Premium Third Party ProgramPremium Third Party Program


  • New Isothiazoles in stock !

    New Isothiazoles in stock !

    Every quarter, Bellen is introducing new compounds to its catalog.
    Discover now some of our new isothiazoles. Compounds are in stock.
    For more information, please contact your sales team :

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  • Bellen Completed C Round of Financing

    Bellen Completed C Round of Financing

    Bellen Chemistry recently made another big step forward and announced that the company has successfully completed its C round of financing in 6 weeks.

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  • Discover Bellen’s sites and history

    Discover Bellen’s sites and history

    For our 10th anniversary, in 2017, we decided to give you an overview of Bellen's history.
    Watch this 5 minutes movie to discover more about Bellen's sites, people, offer and strategy.

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  • Available from gram to kilogram

    Available from gram to kilogram

    Looking for fast delivery of Isoquinolines ?

    Check our inventory and ask for a quote :
    80% of our catalog compounds already have a scaled-up route.

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  • Partnership with ABCR

    Partnership with ABCR

    You can now buy Bellen’s catalogue compounds to our partner abcr.
    Have a look to their website and discover “Gute Chemie”.

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  • BIOISOSTERES compounds!

    BIOISOSTERES compounds!

    Phenyl Isostere : Facilitate your SAR studies by switching one of your phenyl group

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