SAR of biphenyl carboxamide ligands of the human melanin-concentrating hormone receptor 1 (MCH R1): Discovery of antagonist SB-568849
摘要:
We report here the discovery of a class of MCH R1 ligands based on a biphenyl carboxamide template. A docked-in model is presented indicating key interactions in the putative binding site of the receptor. Parallel high throughput synthetic techniques were utilised to allow rapid exploration of the structure-activity relationship around this template, leading to compound SB-568849 which possessed good receptor affinity and selectivity. This compound proved to be an antagonist with stability in vivo, an acceptable brain-blood ratio and oral bioavailability. (c) 2006 Elsevier Ltd. All rights reserved.
The present invention is directed to substituted thiatriazaacenaphthylene-6-carbonitrile compounds of formula (I):
and forms thereof, their synthesis and use for treating, preventing or ameliorating a chronic or acute protein kinase mediated disease, disorder or condition.
The present invention is directed to novel thia-tetraazaacenaphthylene compounds of Formula (I):
and pharmaceutically acceptable forms thereof and their synthesis and use as inhibitors of ATP-protein kinase interactions.
Effect of Topologically Controlled Coulombic Interactions on the Dynamic Behavior of Photoexcited Nitrophenyl Alkyl Ethers in the Presence of Tertiary Amines with Limited Motion Freedom
作者:Roberto Gonzalez-Blanco、José L. Bourdelande、Jordi Marquet
DOI:10.1021/jo961821i
日期:1997.10.1
Time-resolved electronic absorption spectroscopy has been successfully applied to clarify the mechanism of the ''abnormal'' photochemical cleavage of 4-nitrophenyl piperidinoalkyl ethers induced by controlled Coulombic disturbance of the ''normal'' electronic distribution of the radical anion intermediate. Thus, photolysis of 1-piperidino-2-(2-methoxy-4-nitrophenoxy (a system with an amine with limited freedom of motion) in acetonitrile leads to C-O bond photocleavage in a relatively slow process (k approximate to 4 x 10(5) s(-1)) from intermediate species that show radical-ion pair behavior. Systems with higher freedom of motion of the amine moiety, such as 1-piperidino-5-(2-methoxy-4-nitrophenoxy)pentane or 4-nitroveratrole + triethylamine, show the intermediate radical-ion pairs mainly evolving to reduction products, probably a result of intermediates with geometries not allowed for the system with limited freedom of motion of the amine.
Discovery of novel anti-breast cancer agents derived from deguelin as inhibitors of heat shock protein 90 (HSP90)
作者:Cong-Truong Nguyen、Jihyae Ann、Raghaba Sahu、Woong Sub Byun、Sangkook Lee、Gibeom Nam、Hyun-Ju Park、Soeun Park、Yoon-Jae Kim、Ji Young Kim、Jae Hong Seo、Jeewoo Lee
DOI:10.1016/j.bmcl.2020.127374
日期:2020.9
A series of O-substituted analogues of the B,C-ring truncated scaffold of deguelin were designed as C-terminal inhibitors of heat shock protein 90 (HSP90) and investigated as novel antiproliferative agents against HER2-positive breast cancer. Among the synthesized compounds, compound 80 exhibited significant inhibition in both trastuzumab-sensitive and trastuzumab-resistant breast cancer cells, whereas compound 80 did not show any cytotoxicity in normal cells. Compound 80 markedly downregulated the expression of the major client proteins of HSP90 in both cell types, indicating that the cytotoxicity of 80 in breast cancer cells is attributed to the destabilization and inactivation of HSP90 client proteins and that HSP90 inhibition represents a promising strategy to overcome trastuzumab resistance. A molecular docking study of 80 with the homology model of a HSP90 homodimer showed that 80 fit nicely in the C-terminal domain with a higher electrostatic complementary score than that of ATP.