Synthesis and biological evaluation of novel 2-oxo-1,2-dihydroquinoline-4-carboxamide derivatives for the treatment of esophageal squamous cell carcinoma
摘要:
No new and effective treatments have been approved for the treatment of esophageal squamous cell carcinoma (ESCC) in the past decade. Cisplatin and 5-fluoruracil are the most commonly used drugs for this disease. In order to develop a new class of drugs effective in our ESCC phenotypic screens, we began a systematic approach to generate novel compounds based on the 2-oxo-1,2-dihydroquinoline-4carboxamide fragment. Herein, we report on the synthesis and initial assessment of 55 new analogues in two ESCC cell lines. Some of the active analogues with 1050 values around 10 mu M were tested in three additional cell lines. Our structure-activity relationships revealed remarkable alterations in the anti proliferative activities upon modest chemical modifications and autophagy modulation is a suggested mechanism of action. (C) 2018 Elsevier Masson SAS. All rights reserved.
Enantioselective, Intermolecular [<sub>π</sub>2+<sub>σ</sub>2] Photocycloaddition Reactions of 2(1<i>H</i>)-Quinolones and Bicyclo[1.1.0]butanes
作者:Morgane de Robichon、Thilo Kratz、Frederike Beyer、Julian Zuber、Christian Merten、Thorsten Bach
DOI:10.1021/jacs.3c08404
日期:——
enantioselectively to 2(1H)-quinolones upon irradiation (λ = 366 nm) in the presence of a chiral complexing agent. A two-point hydrogenbond between the quinolone and the template is responsible for stereocontrol in the photocycloaddition reaction. The reaction leads to the formation of products with a chiral bicyclo[2.1.1]hexane skeleton in high enantiomeric excess (91–99% ee). The chiraltemplate can be almost