1,2,4-Oxadiazole derivatives targeting EGFR and c-Met degradation in TKI resistant NSCLC
摘要:
Development of small-molecule agents with the ability to facilitate oncoprotein degradation has emerged as a promising strategy for cancer therapy. Since EGFR and c-Met are both implicated in oncogenesis and tumor progression, we initiated a screening program by using an in-house library to identify agents capable of inducing the concomitant suppression of EGFR and c-Met expression, which led to the identification of compound 1, a 1,2,4-oxadiazole derivative. Based on the scaffold of 1, we developed a series of derivatives to assess their efficacies in facilitating the downregulation of EGFR and c-Met, among which compound 48 represented the optimal agent. 48 showed equipotent anti-proliferative activity against a panel of five NSCLC cell lines with different EGFR mutational status (IC50 = 0.2-0.6 mu M), while the same panel exhibited differential sensitivity to different EGFR kinase inhibitors tested. Cell cycle analysis indicated that the antiproliferative activity of 48 was associated with its ability to cause G2/M arrest and, to a lesser extent, apoptosis. Western blot and RT-PCR analyses revealed that 48 facilitated the downregulation of EGFR and c-Met at the protein level. In vivo data showed that oral administration of 48 was effective in suppressing gefitinib-resistant H1975 xenograft tumor growth in nude mice, and at a suboptimal dose, could sensitize H1975 tumors to gefitinib. Based on these findings, 48 represents a promising candidate for further development to target EGFR TKI-resistant NSCLC via dual inhibition of EGFR and c-Met oncoproteins. (C) 2019 Elsevier Masson SAS. All rights reserved.
Aminocarbonylation of N-Containing Heterocycles with Aromatic Amines Using Mo(CO)6
作者:Sandrine Piguel、Marius Mamone、Jessy Aziz、Julie Le Bescont
DOI:10.1055/s-0037-1609152
日期:2018.4
aminocarbonylation of nitrogen-containing heterocycles with anilinederivatives using molybdenum hexacarbonyl as a CO solid source, expanding the scope of the limited examples. This method is compatible with a variety of substitutions on the aniline moiety. The simple reaction conditions include easily available Pd(dppf)Cl2 catalyst, DBU as base in DMF at 120 °C for 3 hours in sealed tube thereby leading to the isolation
Aryl halides and triflates are coupled with primary amides to give the corresponding arylamines in the presence of a palladium catalyst, a suitable ligand, and a base. The catalyst system performs well for a large number of different substrates at 100-150 degrees C without solvent, and with low catalyst levels (0.12 mol% Pd). Nicotinamide might be useful as a nitrogen source in the Pd-catalyzed amination reaction. (C) 2009 Elsevier Ltd. All rights reserved.
WO2021030551A5
申请人:——
公开号:WO2021030551A5
公开(公告)日:2023-08-16
COMPOUNDS AND COMPOSITIONS FOR DIFFERENTIAL MODULATION OF NICOTINAMIDE ADENINE DINUCLEOTIDE