Design of new potent and selective secretory phospholipase A2 inhibitors. 6-Synthesis, structure–activity relationships and molecular modelling of 1-substituted-4-[4,5-dihydro-1,2,4-(4H)-oxadiazol-5-one-3-yl(methyl)]-functionalized aryl piperazin/one/dione derivatives
摘要:
The group IIA human non-pancreatic secretory phospholipase A(2) (hnp-sPLA(2)) is one of the enzymes implied in the inflammatory process. In the course of our work on inhibitors of this enzyme we investigated the influence of rigidity of the piperazine region on the biological activity. Several modifications were explored. Various linkers, such as amide, urea, carbamate, or alkoxyphenyl were inserted between the piperazine and the lipophilic chain. Also, modification of the piperazine core to incorporate carbonyl groups was studied. In an in vitro fluorimetric assay using the human GIIA (HPLA(2)) and porcine pancreatic GIB enzymes, compound 60a (Y = phenoxy, R = C18H37, Z= CH2) had the optimal activity with an IC50 = 30 nM on HPLA(2). By means of molecular modelling we attempted to get informations towards comprehension of differences in activity. (C) 2010 Elsevier Ltd. All rights reserved.
A glycerin derivative having the following formula (I) or (I') and a pharmacologically acceptable salt thereof are useful to treat diseases caused by the platelet activating factor. ##STR1##
具有以下公式(I)或(I')的甘油衍生物以及药用可接受的盐,用于治疗由血小板活化因子引起的疾病。
N-Acylbenzotriazole: convenient approach for protecting group-free monoacylation of symmetric diamines
作者:Khalid A. Agha、Nader E. Abo-Dya、Tarek S. Ibrahim、Eatedal H. Abdel-Aal、Zakaria K. Abdel-Samii
DOI:10.1007/s00706-020-02579-5
日期:2020.4
AbstractAn efficient green route for monoacylation of aromatic diamines, namely o-phenylenediamine and p-phenylenediamine and aliphatic diamines ethylenediamine and piperazine using N-acylbenzotriazoles (NABs) in n-butanol was developed. The new protocol does not require prior selective protection of the diamine and comprises simple conditions, short reaction times, an easy work up as well as high
An object of the present invention is to provide a novel preparation method that can shorten the preparation period of an oligonucleic acid compound.
An example of the present invention is a method for subjecting a compound [A] having a hydroxyl group or a primary or secondary amino group and a compound [B] having a substituent containing a phosphorus atom and represented by the following general formula [1]:
to a condensation reaction to prepare a compound [C] represented by the following general formula [C]:
wherein the condensation reaction is carried out in a mixed solvent containing a polar solvent and a halogen solvent as a reaction solvent.