The ERK/MAP kinase cascade is a key mechanism subject to dysregulation in cancer and is constitutively activated or highly upregulated in many tumor types. Mutations associated with upstream pathway components RAS and Raf occur frequently and contribute to the oncogenic phenotype through activation of MEK and then ERK. Inhibitors of MEK have been shown to effectively block upregulated ERK/MAPK signaling in a range of cancer cell lines and have further demonstrated early evidence of efficacy in the clinic for the treatment of cancer. Guided by structural insight, a strategy aimed at the identification of an optimal diphenylamine-based MEK inhibitor with an improved metabolism and safety profile versus PD-0325901 led to the discovery of development candidate 1-({3,4-difluoro-2-[(2-fluoro-4-iodophenyl)amino]phenyl}carbonyl)-3-[(2S)-piperidin-2-yl]azetidin-3-ol (XL518, GDC-0973) (1). XL518 exhibits robust in vitro and in vivo in preclinical models with sustained duration of action and is currently in early stage clinical trials. potency and efficacy in preclinical models with sustained duration of action and is currently in early stage clinical trials.
Stability of Boronic Esters to Hydrolysis: A Comparative Study
作者:Raffaella Bernardini、Ambrogio Oliva、Alessandro Paganelli、Ernesto Menta、Mario Grugni、Sergio De Munari、Luca Goldoni
DOI:10.1246/cl.2009.750
日期:2009.7.5
Boronic esters are key intermediates in the synthesis of biologically active compounds such as thrombin and proteasome inhibitors. However, they have low hydrolytic stability both during synthetic reactions and in biological media. We report the preparation of several boronic esters and a comparative study of their stability to hydrolysis vs. the corresponding pinanediol boronic esters, which are among the most hydrolytically stable. We discovered that the boronic esters derived from (1,1′-bicyclohexyl)-1,1′-diol are the most stable among those examined.
作者:Kenneth D. Rice、Naing Aay、Neel K. Anand、Charles M. Blazey、Owen J. Bowles、Joerg Bussenius、Simona Costanzo、Jeffry K. Curtis、Steven C. Defina、Larisa Dubenko、Stefan Engst、Anagha A. Joshi、Abigail R. Kennedy、Angie I. Kim、Elena S. Koltun、Julie C. Lougheed、Jean-Claire L. Manalo、Jean-Francois Martini、John M. Nuss、Csaba J. Peto、Tsze H. Tsang、Peiwen Yu、Stuart Johnston
DOI:10.1021/ml300049d
日期:2012.5.10
The ERK/MAP kinase cascade is a key mechanism subject to dysregulation in cancer and is constitutively activated or highly upregulated in many tumor types. Mutations associated with upstream pathway components RAS and Raf occur frequently and contribute to the oncogenic phenotype through activation of MEK and then ERK. Inhibitors of MEK have been shown to effectively block upregulated ERK/MAPK signaling in a range of cancer cell lines and have further demonstrated early evidence of efficacy in the clinic for the treatment of cancer. Guided by structural insight, a strategy aimed at the identification of an optimal diphenylamine-based MEK inhibitor with an improved metabolism and safety profile versus PD-0325901 led to the discovery of development candidate 1-(3,4-difluoro-2-[(2-fluoro-4-iodophenyl)amino]phenyl}carbonyl)-3-[(2S)-piperidin-2-yl]azetidin-3-ol (XL518, GDC-0973) (1). XL518 exhibits robust in vitro and in vivo in preclinical models with sustained duration of action and is currently in early stage clinical trials. potency and efficacy in preclinical models with sustained duration of action and is currently in early stage clinical trials.