The invention provides a novel class of compounds of formula 1, pharmaceutical compositions comprising such compounds and methods of using such compounds to treat or prevent diseases or disorders associated with abnormal or deregulated kinase activity, particularly diseases or disorders that involve abnormal activation of B-Raf

Compounds and compositions as protein kinase inhibitors

Chk1 suppresses a caspase-2 apoptotic response to dna damage that bypasses p53, bcl-2 and caspase-3

Phosphorus-substituted imidazole compounds with anti-HIV properties having use as therapeutics and for other industrial purposes are disclosed. The compositions inhibit reverse transcriptase activity and are useful therapeutically for the inhibition of such enzymes, as well as in assays for the detection of such enzymes.

Non nucleoside reverse transcriptase inhibitors

KRAS is mutated in ∼20% of human cancers and is one of the most sought-after targets for pharmacological modulation, despite having historically been considered "undruggable." The discovery of potent covalent inhibitors of the KRASG12C mutant in recent years has sparked a new wave of interest in small molecules targeting KRAS. While these inhibitors have shown promise in the clinic, we wanted to explore PROTAC-mediated degradation as a complementary strategy to modulate mutant KRAS. Herein, we report the development of LC-2, the first PROTAC capable of degrading endogenous KRASG12C. LC-2 covalently binds KRASG12C with a MRTX849 warhead and recruits the E3 ligase VHL, inducing rapid and sustained KRASG12C degradation leading to suppression of MAPK signaling in both homozygous and heterozygous KRASG12C cell lines. LC-2 demonstrates that PROTAC-mediated degradation is a viable option for attenuating oncogenic KRAS levels and downstream signaling in cancer cells.

Targeted Degradation of Oncogenic KRASG12C by VHL-Recruiting PROTACs.

Mutant-selective KRASG12C inhibitors, such as MRTX849 (adagrasib) and AMG 510 (sotorasib), have demonstrated efficacy in KRASG12C-mutant cancers, including non–small cell lung cancer (NSCLC) However, mechanisms underlying clinical acquired resistance to KRASG12C inhibitors remain undetermined To begin to define the mechanistic spectrum of acquired resistance, we describe a patient with KRASG12C NSCLC who developed polyclonal acquired resistance to MRTX849 with the emergence of 10 heterogeneous resistance alterations in serial cell-free DNA spanning four genes (KRAS, NRAS, BRAF, MAP2K1), all of which converge to reactivate RAS–MAPK signaling Notably, a novel KRASY96D mutation affecting the switch-II pocket, to which MRTX849 and other inactive-state inhibitors bind, was identified that interferes with key protein–drug interactions and confers resistance to these inhibitors in engineered and patient-derived KRASG12C cancer models Interestingly, a novel, functionally distinct tricomplex KRASG12C active-state inhibitor RM-018 retained the ability to bind and inhibit KRASG12C/Y96D and could overcome resistance Significance: In one of the first reports of clinical acquired resistance to KRASG12C inhibitors, our data suggest polyclonal RAS–MAPK reactivation as a central resistance mechanism We also identify a novel KRAS switch-II pocket mutation that impairs binding and drives resistance to inactive-state inhibitors but is surmountable by a functionally distinct KRASG12C inhibitor See related commentary by Pinnelli and Trusolino, p 1874 This article is highlighted in the In This Issue feature, p 1861

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Clinical Acquired Resistance to KRASG12C Inhibition through a Novel KRAS Switch-II Pocket Mutation and Polyclonal Alterations Converging on RAS-MAPK Reactivation.

Capping off an era marred by drug development failures and punctuated by waning interest and presumed intractability toward direct targeting of KRAS, new technologies and strategies are aiding in the target's resurgence. As previously reported, the tetrahydropyridopyrimidines were identified as irreversible covalent inhibitors of KRASG12C that bind in the switch-II pocket of KRAS and make a covalent bond to cysteine 12. Using structure-based drug design in conjunction with a focused in vitro absorption, distribution, metabolism and excretion screening approach, analogues were synthesized to increase the potency and reduce metabolic liabilities of this series. The discovery of the clinical development candidate MRTX849 as a potent, selective covalent inhibitor of KRASG12C is described.

Identification of the Clinical Development Candidate MRTX849, a Covalent KRASG12C Inhibitor for the Treatment of Cancer.

Aryl- and heteroaryl-substituted urea compounds useful in the treatment of diseases and conditions related to DNA damage or lesions in DNA replication are disclosed. Methods of making the compounds, and their use as therapeutic agents, for example, in treating cancer and other diseases characterized by defects in DNA replication, chromosome segregation, or cell division also are disclosed.

Compounds useful for inhibiting Chk1

Aryl- and heteroaryl substituted urea compounds useful in the treatment of diseases and conditions related to DNA damage or lesions in DNA replication are disclosed. Methods of making the compounds, and their use as therapeutic agents, for example, in treating cancer and other diseases characterized by defects in DNA replication, chromosome segregation, or cell division also are disclosed. Wherein W' is a six-membered aromatic ring containing at least 2 introgen atoms and optionally substitutedas defined in the claims, Z' is a five- or six membered aromatic or heteraromatic ring as defined in the claims, Y' is O or S.

Aryl and heteroaryl urea chk1 inhibitors for use as radiosensitizers and chamosensitizers

Compounds of Formula I: (I) in which A, A 1 , R 1 , R 7a , R 7b , R 8 and R 10 have the meanings given in the specification, are DP2 receptor inhibitors useful in the treatment of useful in the treatment and prevention of immunologic diseases, allergic diseases such as asthma, allergic rhinitis and atopic dermatitis, and other inflammatory diseases mediated by prostaglandin D 2 (PGD 2 ). The compounds of Formula I may also be useful in treating diseases or medical conditions involving the Th2 T cell via production of IL-4, IL-5 and/or IL-13.

7-phenoxychroman carboxylic acid derivatives

The invention provides novel spirochroman compounds of Formulas I and II that inhibit β-secretase cleavage of APP and are useful as therapeutic agents for treating neurodegenerative diseases.

Cook Adam

Papers

Identification of the Clinical Development Candidate MRTX849, a Covalent KRASG12C Inhibitor for the Treatment of Cancer.

Compounds useful for inhibiting Chk1

Aryl and heteroaryl urea chk1 inhibitors for use as radiosensitizers and chamosensitizers

7-phenoxychroman carboxylic acid derivatives

S piro [chroman - 4, 4 ' - imidazol] ones as beta - secretase inhibitors