( E )-3-Heteroarylidenechroman-4-ones as potent and selective monoamine oxidase-B inhibitors
摘要:
A series of (E)-3-heteroarylidenechroman-4-ones (1a-r) was designed, synthesized and investigated in vitro for their ability to inhibit the enzymatic activity of both human monoamine oxidase (hMAO) isoforms, hMAO-A and hMAO-B. All the compounds were found to be selective hMAO-B inhibitors showing IC50 values in the nanomolar or micromolar range. (E)-5,7-Dichloro-3-{[(2-(dimethylamino) pyrimidin-5-yl]methylene}chroman-4-one (1c) was the most interesting compound identified in this study, endowed with higher hMAO-B potency (IC50 = 10.58 nM) and selectivity (SI > 9452) with respect to the reference selective inhibitor selegiline (IC50 = 19.60 nM, IC50 > 3431). Molecular modelling studies were performed for rationalizing at molecular level the target selective inhibition of our compounds, revealing a remarkable contribution of hydrogen bond network and water solvent. (C) 2016 Elsevier Masson SAS. All rights reserved.
Chiral Squaramide-Catalyzed Sulfa-Michael/Aldol Cascade for the Asymmetric Synthesis of Spirocyclic Tetrahydrothiophene Chromanone Derivatives
作者:Bo-Liang Zhao、Lei Liu、Da-Ming Du
DOI:10.1002/ejoc.201402889
日期:2014.12
A bifunctional squaramide-catalyzed sulfa-Michael/aldol cascadereaction between benzylidenechroman-4-ones and 1,4-dithiane-2,5-diol with a low catalyst loading has been developed. This reaction constitutes a facile asymmetricsynthesis of chiral spirocyclic tetrahydrothiophene chromanone derivatives with three contiguous stereocenters in high to excellent yields (up to 99 %) and with high enantioselectivities
The present invention relates to tricyclic pyrazoles that are useful for treating cellular proliferative diseases, for treating disorders associated with KSP kinesin activity, and for inhibiting KSP kinesin. The invention also relates to compositions which comprise these compounds, and methods of using them to treat cancer in mammals.