Discovery and Structure–Activity Relationship of Novel 2,3-Dihydrobenzofuran-7-carboxamide and 2,3-Dihydrobenzofuran-3(2H)-one-7-carboxamide Derivatives as Poly(ADP-ribose)polymerase-1 Inhibitors
摘要:
Novel substituted 2,3-dihydrobenzofuran-7-carboxamide (DHBF-7-carboxamide) and 2,3-dihydrobenzofuran-3(2H)-one-7-carboxamide (DHBF-3-one-7-carboxamide) derivatives were synthesized and evaluated as inhibitors of poly(ADP-ribose)polymerase-1 (PARP-1). A structure-based design strategy resulted in lead compound 3 (DHBF-7-carboxamide; IC50 = 9.45 mu M). To facilitate synthetically feasible derivatives, an alternative core was designed, DHBF-3-one-7-carboxamide (36, IC50 = 16.2 mu M). The electrophilic 2-position of this scaffold was accessible for extended modifications. Substituted benzylidene derivatives at the 2-position were found to be the most potent, with 3',4'-dihydroxybenzylidene 58 (IC50 = 0.531 mu M) showing a 30-fold improvement in potency. Various heterocycles attached at the 4'-hydroxyl/4'-amino of the benzylidene moiety resulted in significant improvement in inhibition of PARP-1 activity (e.g., compounds 66-68, 70, 72, and 73; IC50 values from 0.718 to 0.079 mu M). Compound 66 showed selective cytotoxicity in BRCA2-deficient DT40 cells. Crystal structures of three inhibitors (compounds (-)-13c, 59, and 65) bound to a multidomain PARP-1 structure were obtained, providing insights into further development of these inhibitors.
[EN] SUBSTITUTED DIHYDROINDENE-4-CARBOXAMIDES AND ANALOGS THEREOF, AND METHODS USING SAME<br/>[FR] DIHYDROINDÈNE-4-CARBOXAMIDES SUBSTITUÉS, LEURS ANALOGUES ET PROCÉDÉS D'UTILISATION CORRESPONDANT
申请人:ARBUTUS BIOPHARMA CORP
公开号:WO2018172852A1
公开(公告)日:2018-09-27
The present invention includes novel substituted bicyclic compounds, and compositions comprising the same, that can be used to treat or prevent hepatitis B virus (HBV) infections in a patient. In certain embodiments, the compounds and compositions of the invention are capsid inhibitors. (Formula I)
SUBSTITUTED DIHYDROINDENE-4-CARBOXAMIDES AND ANALOGS THEREOF, AND METHODS USING SAME
申请人:Arbutus Biopharma Corporation
公开号:EP3601216A1
公开(公告)日:2020-02-05
Discovery of Potent Isoindolinone Inhibitors that Target an Active Conformation of PARP1 Using DNA‐Encoded Libraries
作者:Kelly A. McCarthy、Douglas J. Marcotte、Sangram Parelkar、Crystal L. McKinnon、Lindsay E. Trammell、Eric L. Stangeland、Rachael R. Jetson
DOI:10.1002/cmdc.202400093
日期:2024.6.3
Inhibition of poly (ADP‐ribose) polymerase‐1 (PARP1), a DNA repair enzyme, has proven to be a successful strategy for the treatment of various cancers. With the appropriate selection conditions and protein design, DNA‐encoded library (DEL) technology provides a powerful avenue to identify small molecules with the desired mechanism of action towards a target of interest. However, DNA‐binding proteins, such as PARP1, can be challenging targets for DEL screening due to non‐specific protein−DNA interactions. To overcome this, we designed and screened a PARP1 catalytic domain construct without the autoinhibitory helical domain. This allowed us to interrogate an active, functionally‐relevant form of the protein resulting in the discovery of novel isoindolinone PARP1 inhibitors with single‐digit nanomolar potency. These inhibitors also demonstrated little to no PARP1−DNA trapping, a property that could be advantageous in the clinic.