124377-60-2Relevant academic research and scientific papers
2',6'-Dimethylphenoxyacetyl: A new achiral high affinity P3-P2 ligand for peptidomimetic-based HIV protease inhibitors
Beaulieu, Pierre L.,Anderson, Paul C.,Cameron, Dale R.,Croteau, Gilbert,Gorys, Vida,Grand-Ma?tre, Chantal,Lamarre, Daniel,Liard, Francine,Paris, William,Plamondon, Louis,Soucy, Fran?ois,Thibeault, Diane,Wernic, Dominik,Yoakim, Christiane,Pav, Susan,Tong, Liang
, p. 1094 - 1108 (2007/10/03)
Starting from palinavir (1), our lead HIV protease inhibitor, we have discovered a new series of truncated analogues in which the P3-P2 quinaldic-valine portion of 1 was replaced by 2',6'-dimethylphenoxyacetyl. With EC50's in the 1-2 nM range, some of these compounds are among the most potent inhibitors of HIV replication in vitro, reported to date. One of the most promising members in this series (compound 27, BILA 2185 BS) exhibited a favorable overall pharmacokinetic profile, with 61% apparent oral bioavailability in rat. X-ray crystal structures and molecular modeling were used to rationalize the high potency resulting from incorporation of this structurally simple, achiral ligand into the P3-P2 position of hydroxyethylamine-based HIV protease inhibitors.
Antiphlogistic aryloxypropionic acids: Configurational study
Azzolina,Ghislandi
, p. 713 - 724 (2007/10/02)
Configurational relationships of a series of antiphlogistic 2-aryloxypropionyl derivatives by means of 1H-NMR and HPLC methods were demonstrated. NMR spectra of racemic mixtures and optically active esters were recorded by adding suitable quant
Optical resolution of aryloxypropionic acids and their esters by HPLC on cellulose tris-3,5-dimethyl-triphenylcarbamate derivative
Azzolina,Collina,Ghislandi
, p. 1401 - 1416 (2007/10/02)
Chiral chromatographic resolution of a series of antiphlogistic 2- aryloxypropionic acids and their methyl and ethyl esters was performed using a Chiralcel OD column. The CSP selected resolved most of the acids and esters efficiently, the enantiomers being well separated without requiring time consuming analysis. Chromatographic separation of R enriched samples was performed to determine the correct elution order. Using eluting systems such as hexane and 2-propanol, or hexane, 2-propanol and formic acid, the S enantiomer of all acids and esters was always found to elute first. We also considered the role of electron-donating or electron-withdrawing substituents (at the aryloxylic moiety) on the chiral resolution. It was shown that the electronic features of the substituents have more influence on the chiral interactions between the solutes and the CSP than their steric hindrance. Finally we determined, by molecular models, the interaction between CSP and solutes. In this way were able to determine all the potential sites for interactions, which are compatible with the conformations of the compounds and the structure of the stationary phase, and point out those interactions which enable chiral resolution.
Potential Antisecretory Antidiarrheals. 2. α2-Adrenergic 2-imidazolines
Moormann, Alan E.,Pitzele, Barnett S.,Jones, P. H.,Gullikson, Gary W.,Albin, David,et al.
, p. 614 - 626 (2007/10/02)
Lofexidine, an α2-agonist, has central hypotensive activity and peripheral intestinal antisecretory activity.Analogues were synthetsized with increased polarity in an attempt to prevent penetration of the blood-brain barrier.The compounds were evaluated in the cholera toxin treated ligated jejunum of the rat and in the Ussing chamber with a rabbit ileum preparation.Active compounds were determined to be α2-adrenergic agonists by yohimbine reversals of their Ussing chamber activities.The 2,6-dimethyl derivative of lofexidine, 4a, was as active as lofexidine invivo, but derivatives with 2,6-substituents larger than ethyl were inactive. (Aryloxy)alkyl derivatives which have an imidazoline and a methyl or larger group as part of the alkyl exhibited the best antisecretory activity.Compounds with substituents in the para position of the phenyl ring were generally inactive. 3-Amino-2,6-dimethyl derivative 21 was twice as active as 4a.A 2-methyl substituent is required in the 3-amino series to retain good activity. 2-methyl derivative 12a had activity comparable to that of 4a, while 6-methyl derivative 12f was inactive.Substituents on the 3-amino group did not affect the activity, but substituting a hydroxyl for the amino group produced an inactive compounds.Replacing the phenyl moiety with a 4-indole resulted in retention of activity, but other heterocycles were inactive.Compound 12a was resolved and d isomer 32 was five times more potent than l isomer 33.The more active compounds in the rat cholera toxin assey (RCTA), when evaluated in the dog, exhibited antisecretory activity but also exhibited centaral nervous system (CNS) effects, sedation and ataxia, at 10 mg/kg, and in spontaneouslyhypertensive rats at 50 mg/kg.A measure of polarity, log P, was calculated for the (aryloxy)alkyl groups.Regression analysis showed no correlation of antisecretory ED50 to the calculated log P.The active compounds did not show a separation of the central CNS effects from the peripheral antisecretory activity by increasing the polarity.
