159877-47-1Relevant articles and documents
Modulation of the Passive Permeability of Semipeptidic Macrocycles: N- And C-Methylations Fine-Tune Conformation and Properties
Boudreault, Pierre-Luc,Comeau, Christian,Derbali, Rabeb Mouna,Grandbois, Michel,Poulet, Sylvain,Ries, Benjamin,Riniker, Sereina,Sarret, Philippe,Stadelmann, Thomas,Tremblay, Jacob,C?té, Jér?me,Fr?hlich, Ulrike,Leclair, Grégoire,Marsault, éric
, p. 5365 - 5383 (2021/05/04)
Incorporating small modifications to peptidic macrocycles can have a major influence on their properties. For instance, N-methylation has been shown to impact permeability. A better understanding of the relationship between permeability and structure is of key importance as peptidic drugs are often associated with unfavorable pharmacokinetic profiles. Starting from a semipeptidic macrocycle backbone composed of a tripeptide tethered head-to-tail with an alkyl linker, we investigated two small changes: peptide-to-peptoid substitution and various methyl placements on the nonpeptidic linker. Implementing these changes in parallel, we created a collection of 36 compounds. Their permeability was then assessed in parallel artificial membrane permeability assay (PAMPA) and Caco-2 assays. Our results show a systematic improvement in permeability associated with one peptoid position in the cycle, while the influence of methyl substitution varies on a case-by-case basis. Using a combination of molecular dynamics simulations and NMR measurements, we offer hypotheses to explain such behavior.
Stereoselective synthesis of 2,6-: Trans -4-oxopiperidines using an acid-mediated 6- endo-trig cyclisation
Bell, Jonathan D.,Harkiss, Alexander H.,Wellaway, Christopher R.,Sutherland, Andrew
, p. 6410 - 6422 (2018/10/02)
An acid-mediated 6-endo-trig cyclisation of amine-substituted enones has been developed for the stereoselective synthesis of trans-6-alkyl-2-methyl-4-oxopiperidines. Performed under conditions that prevent removal of the Boc-protecting group or acetal formation, the key cyclisation was found to generate cleanly the 4-oxopiperidine products in high overall yields from a wide range of alkyl substituted enones. The synthetic utility of the trans-6-alkyl-2-methyl-4-oxopiperidines formed from this process was demonstrated with the total synthesis of the quinolizidine alkaloid, (+)-myrtine and the piperidine alkaloid, (-)-solenopsin A.
BICYCLIC PYRIMIDONE COMPOUNDS AS INHIBITORS OF LP-PLA2
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Page/Page column 20-21, (2014/08/07)
The present invention relates to novel pyrimido[1,6-a]pyrimidin-6(2H)-one compounds that inhibit Lp-PLA2 activity, processes for their preparation, to compositions containing them and to their use in the treatment of diseases associated with the activity of Lp-PLA2, for example atherosclerosis, Alzheimer's disease.