Tag Archives: metabolism

Discovery of PF-04691502 (PI3K/mTOR dual inhibitor)


Rapamycin and it’s analogues (or rapalogues e.g. CCI-779) modulate the phosphatidylinositol 3-kinase (PI3K) signalling cascade by binding to an allosteric site on the mTORC1 complex (Mammalian target of rapamycin (mTOR), a class IV PI3K protein kinase, forms two functional complexes, … Continue reading

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TAK-733 & CH4987655 (Allosteric MEK Inhibitors)


The mitogen-activated protein kinase (MAPK) signalling cascade is one of the key pathways regulating cell proliferation and differentiation and aberrant activation of this pathway is implicated in a number of cancers. Targeting components of the cascade thus has the potential … Continue reading

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Structural Alert: Benzimidazoles


An informative letter, just published by a team from Novartis, highlights the risk of suitably substituted benzimidazoles acting as latent precursors to reactive ortho-iminoquinone species.  The example they report (see structure on left below) was Ames positive and exhibited time-dependent inhibition … Continue reading

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Aromatic chloride to nitrile transformation


Introducing a nitrile in the place of less polar substituents is a fairly common approach to reducing lipophilicity in a lead molecule but in this review from the MedChem group at Pfizer the associated benefits of specifically the aromatic chloride to … Continue reading

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Improved PK profile through fluorine and deuterium incorporation


Compound (1) was identified by scientists at Merck as a potent Aurora kinase inhibitor with the potential to be useful in the treatment of various cancers.  In this paper the authors reveal that the basic amine which is key to good … Continue reading

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