Novel Synthesis of 3,3-Bis-(4-chromone-3-ylmethyl)-chroman-4-ones
作者:Krishnan Devarajan、Kalpattu K. Balasubramanian、Shanmugasundaram Bhagavathy
DOI:10.1080/00397911.2012.691594
日期:2013.8.18
3-Hydroxymethylchromones have been found to undergo a novel transformation in the presence of Cs2CO3 in toluene or xylene as solvent to afford trimeric chromones, 3,3-bis-(4-chromone-3-ylmethyl)-chroman-4-ones. The structure of the trimer has also been confirmed by single-crystal x-ray diffraction study. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.
Bioisosteric Replacement and Related Analogs in the Design, Synthesis and Evaluation of Ligands for Muscarinic Acetylcholine Receptors
作者:Richie Bhandare、Daniel Canney
DOI:10.2174/15734064113096660043
日期:2014.4
Previous structure-activity relationship studies involving a series of lactone-based muscarinic ligands identified
a lead compound containing a diphenylmethylpiperazine moiety (4; IC50 = 340 nM). The purpose of the present work is to
investigate 1,3-benzodioxoles, 4,4-diethyl substituted tetrahydrofurans, 5-substituted oxazolidinones and chromones as
bioisosteric replacements for the lactone ring in a novel series of muscarinic ligands. The approach provided compounds
with improved % inhibition values and identified a non-selective muscarinic ligand with an IC50 value of 280 nM. The
structure-activity relationship for this new series will be discussed. Selected compounds were evaluated in preliminary assays
for subtype selectivity and were found to be non-selective.