Exploring the Structure−Activity Relationships of [1-(4-tert-Butyl-3‘-hydroxy)benzhydryl-4-benzylpiperazine] (SL-3111), A High-Affinity and Selective δ-Opioid Receptor Nonpeptide Agonist Ligand
摘要:
SL-3111 [1-(4-tert-butyl-3'-hydroxy)benzhydryl-4-benzylpiperazine] is a de novo designed, high-affinity and selective nonpeptide peptidomimetic agonist of the delta-opioid receptor. In a previous report we had described the unique biological characteristics of this ligand and also a need for further structural evaluation(6). To pursue this, we have introduced a completely different heterocyclic template (2 and 3), which, based on molecular modeling studies, may present the required structural features to properly orient the pharmacophore groups. We also have made more subtle changes to the original piperazine scaffold (5 and 11). The biological activities of these compounds revealed an important participation of the scaffold in the ligand-receptor interaction. To further explore functional diversity on the scaffold, we have maintained the original piperazine ring and introduced four different functionalities at position 2 of the heterocyclic ring (15a-d; a = CH2-O-CH2-Ph; b = Me; c = CH2Ph; d = CH2OH). The biological activities observed for these compounds showed a very interesting trend in terms of the steric effects of the groups introduced at this position. A decrease of almost 2000-fold in affinity and potency at the delta-receptor was observed for 15c compared with 15b. This difference may be explained if we postulate that the bioactive conformation of these peptidomimetics is close to the minimal energy conformations calculated in our study. On the basis of these findings we have realized the importance of this position to further explore and simplify the structure of future generations of peptidomimetic ligands.
Exploring the Structure−Activity Relationships of [1-(4-tert-Butyl-3‘-hydroxy)benzhydryl-4-benzylpiperazine] (SL-3111), A High-Affinity and Selective δ-Opioid Receptor Nonpeptide Agonist Ligand
摘要:
SL-3111 [1-(4-tert-butyl-3'-hydroxy)benzhydryl-4-benzylpiperazine] is a de novo designed, high-affinity and selective nonpeptide peptidomimetic agonist of the delta-opioid receptor. In a previous report we had described the unique biological characteristics of this ligand and also a need for further structural evaluation(6). To pursue this, we have introduced a completely different heterocyclic template (2 and 3), which, based on molecular modeling studies, may present the required structural features to properly orient the pharmacophore groups. We also have made more subtle changes to the original piperazine scaffold (5 and 11). The biological activities of these compounds revealed an important participation of the scaffold in the ligand-receptor interaction. To further explore functional diversity on the scaffold, we have maintained the original piperazine ring and introduced four different functionalities at position 2 of the heterocyclic ring (15a-d; a = CH2-O-CH2-Ph; b = Me; c = CH2Ph; d = CH2OH). The biological activities observed for these compounds showed a very interesting trend in terms of the steric effects of the groups introduced at this position. A decrease of almost 2000-fold in affinity and potency at the delta-receptor was observed for 15c compared with 15b. This difference may be explained if we postulate that the bioactive conformation of these peptidomimetics is close to the minimal energy conformations calculated in our study. On the basis of these findings we have realized the importance of this position to further explore and simplify the structure of future generations of peptidomimetic ligands.
Compounds are provided that act as potent antagonists of the CCR1 receptor, and which have been further confirmed in animal testing for inflammation, one of the hallmark disease states for CCR1. The compounds are generally aryl piperazine derivatives and are useful in pharmaceutical compositions, methods for the treatment of CCR1-mediated diseases, and as controls in assays for the identification of competitive CCR1 antagonists.
Efficient one-pot synthesis of enantiomerically pure <i>N</i>-protected-α-substituted piperazines from readily available α-amino acids
作者:Mouhamad Jida、Steven Ballet
DOI:10.1039/c7nj04039c
日期:——
A new pathway towards enantiomerically pure 3-substituted piperazines, bearing a benzyl protectinggroup, has been developed in good overall yields (83–92%), starting from commercially available N-protected aminoacids. The methodology represents an efficient and simple one-pot procedure, employing a synthetic sequence consisting of an Ugi-4 component reaction, a Boc-deprotection, an intramolecular
There is provided a novel compound that inhibits interaction between murine double minute 2 (Mdm2) protein and p53 protein and exhibits anti-tumor activity. The present invention provides an imidazothiazole derivative represented by the following formula (1) having various substituents that inhibits interaction between Mdm2 protein and p53 protein and exhibits anti-tumor activity:
wherein R
1
, R
2
, R
3
, R
4
, and R
5
in the formula (1) each has the same meaning as defined in the specification.
There is provided a novel compound that inhibits interaction between murine double minute 2 (Mdm2) protein and p53 protein and exhibits anti-tumor activity. The present invention provides an imidazothiazole derivative represented by the following formula (1) having various substituents that inhibits interaction between Mdm2 protein and p53 protein and exhibits anti-tumor activity:
wherein R1, R2, R3, R4, and R5 in the formula (1) each has the same meaning as defined in the specification.
Chemical mechanical planarization for tungsten-containing substrates
申请人:AIR PRODUCTS AND CHEMICALS, INC.
公开号:EP2779217A2
公开(公告)日:2014-09-17
Chemical mechanical polishing (CMP) compositions for polishing tungsten or tungsten-containing substrates comprise an abrasive, at least one solid catalyst, a chemical additive selected from the groups consisting of piperazine derivatives, salts of cyanate, and combinations thereof; and a liquid carrier. Systems and processes use the aqueous formulations for polishing tungsten or tungsten-containing substrates.