A simple and efficient transprotection of aryl methyl ether to aryl benzoate under microwave activation
摘要:
A simple and efficient method for the transprotection of aryl methyl ether to easily cleavable arylbenzoate mediated by microwave activation has been developed. One important feature of this method is its high tolerance towards sensitive functionalities and to some extent to bulky environment. (c) 2006 Elsevier Ltd. All rights reserved.
To explore further the practical uses of highly active manganese (Mn*), a variety of alcohols were treated with Mn*, and the resulting complexes were coupled with acid chlorides and/or acetic anhydride in the absence of any extra catalyst. The subsequent reactions took place smoothly under mild conditions, providing the corresponding O-acylation products in good to excellent isolated yields.
A High-Throughput, Low-Volume Enzyme Assay on Solid Support
作者:Peter Babiak、Jean-Louis Reymond
DOI:10.1021/ac048611n
日期:2005.1.1
water-soluble substrates (glycosidases), whole-protein substrates (proteases), and enzyme inhibition measurements. Hydrolytically labile umbelliferyl esters can be used to assaylipases in this format without background hydrolysis. High throughput and reproducibility were tested by fingerprint analysis of lipases and esterases against 37 different fluorogenic ester substrates. A set of eight fluorogenic unbelliferyl
Inhibitory effects and structural insights for a novel series of coumarin-based compounds that selectively target human CA IX and CA XII carbonic anhydrases
作者:Laura De Luca、Francesca Mancuso、Stefania Ferro、Maria Rosa Buemi、Andrea Angeli、Sonia Del Prete、Clemente Capasso、Claudiu T. Supuran、Rosaria Gitto
DOI:10.1016/j.ejmech.2017.11.061
日期:2018.1
class of inhibitors of the family of metalloenzymes carbonic anhydrases (CA, EC 4.2.1.1). Several coumarins display higher affinity and selectivitytoward most relevant and druggable CA isoforms. By decorating the natural compound umbelliferone (1) we have identified a new series of coumarin-based compounds demonstrating high CA inhibitory effects with nanomolar affinity for hCA IX and hCA XII isoforms
The invention relates to a specific substrate on an ALDH isoenzyme, to a composition comprising at least one such substrate, to a diagnostic marker comprising such a substrate, and to the uses thereof and associated methods.
Asthma is a chronic inflammatory disorder that causes contraction in the smooth muscle of the airway and blocking of airflow. Reversal the contractile process is a strategy for the search of new drugs that could be used for the treatment of asthma. This work reports the semisynthesis, ex vivo relaxing evaluation and SAR studies of a series of 18 coumarins. The results pointed that the ether derivatives 1-3, 7-9 and 13-15 showed the best activity (E-max = 100%), where compound 2 (42 mu M) was the most potent, being 4-times more active than theophylline (positive control). The ether homologation (methyl, ethyl and propyl) in position 7 or positions 6 and 7 of coumarins lead to relaxing effect, meanwhile formation of esters generated less active compounds than ethers. The SAR analysis showed that it is necessary the presence of two small ether groups and the methyl group at position 4 (site 3) encourage biological activity through soft hydrophobic changes in the molecule, without drastically affecting the cLogP. (C) 2014 Elsevier Masson SAS. All rights reserved.