Simplification of the tetracyclic SIRT1-selective inhibitor MC2141: Coumarin- and pyrimidine-based SIRT1/2 inhibitors with different selectivity profile
摘要:
In this report we describe the synthesis and biological characterization of two series of sirtuins' inhibitors (SIRTi), designed as simplification products of the previously reported SIRT1-selective inhibitor MC2141 (4). In the first series (5a-t) we report a number of 2-substituted-1,2-dihydrobenzo[f] chromen-3-ones with a marked selectivity for the inhibition of SIRT2 over SIRT1. Some of such derivatives showed also high pro-apoptotic (5i and 5l) and/or cytodifferentiating (5d, 5i, and 5o) properties in a human leukemia cell line (U937). The second group of SIRTi (6a-q) is characterized by some analogues of cambinol (3), a well known SIRTi active against the Burkitt lymphoma. Such compounds, differently from the unselective prototype, are endowed with a selective inhibition of SIRT1 over SIRT2, and, in some cases (6j, 6k, and 6q), are more efficient than 3 to induce apoptosis in U937 cells. (C) 2011 Elsevier Ltd. All rights reserved.
Compounds having the formula
1
are useful for treating diseases that are prevented by or ameliorated with Interleukin-2, Interleukin-4, or Interleukin-5 production inhibitors.
[EN] TACHYKININ RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES DU RECEPTEUR TACHYKININE
申请人:LILLY CO ELI
公开号:WO2005000821A1
公开(公告)日:2005-01-06
The present invention relates to selective NK-1 receptor antagonists of Formula (I) or a pharmaceutically acceptable salt thereof, for the treatment of disorders associated with an excess of tachykinins.
Copper(II) Triflate Catalyzed Amination of 1,3-Dicarbonyl Compounds
作者:Thi My Uyen Ton、Fanny Himawan、Joyce Wei Wei Chang、Philip Wai Hong Chan
DOI:10.1002/chem.201201219
日期:2012.9.17
A method to prepare α,α‐acyl amino acid derivatives efficiently by Cu(OTf)2+1,10‐phenanthroline (1,10‐phen)‐catalyzed amination of 1,3‐dicarbonyl compounds with PhINSO2Ar is described. The mechanism is thought to initially involve aziridination of the enolic form of the substrate, formed in situ through coordination to the Lewis acidic metal catalyst, by the putative copper–nitrene/imido species generated
NIS-TBHP promoted oxidative coupling of C N and C O bonds: A metal-free approach to polysubstituted oxazoles
作者:Shengxiang Yang、Yuzhu Yang、Fei Li、Xiaolan Liu
DOI:10.1016/j.tetlet.2020.151846
日期:2020.5
A metal-free approach to polysubstituted oxazoles via the oxidative coupling of readily available benzylamines and 1,3-dicarbonyl derivatives in the presence of an external base has been developed. A variety of functional groups on both of the starting materials are tolerated using this method, affording the corresponding oxazoles in moderate to good yields. Iodination was proposed as the initiation
An unprecedented silver‐catalyzed difunctionalization of the isocyanogroup with cyclicoximes is described. This method allows efficient and atom‐economic assembly of a vast array of structurally novel and interesting pyrimidinediones, and tolerates a range of functionalities. The resulting products can be easily converted into some useful compounds. Furthermore, the method can also be applied for