Pyrazole and Isoxazole Derivatives as New, Potent, and Selective 20-Hydroxy-5,8,11,14-eicosatetraenoic Acid Synthase Inhibitors
摘要:
In a previous paper, we reported the N-hydroxyformamidine derivative HET0016 as a potent and selective 20-HETE synthase inhibitor. Despite its attraction as a potential therapeutic agent for cerebral diseases, the preparation of an injectable formulation of HET0016 was limited by its poor solubility under neutral conditions and instability under acidic conditions. The instability of HET0016 in acidic conditions is due to the N-hydroxyformamidine moiety, which is considered to be essential for the potent and selective activity seen in our previous study. The activity was maintained when the N-hydroxyformamidine moiety was replaced by an imidazole ring (3a; IC50 = 5.7 +/- 1.0 nM), but this was associated with a loss of selectivity for cytochrome P450s (CYPs). However, other azole derivatives such as isoxazole derivative 23 (IC50 value 38 +/- 10 nM) and pyrazole derivative 24 (IC50 value 23 +/- 12 nM) showed potent and selective activities with improved stability.
nanoparticles have been studied for C−N, C−O, and C−S bond formations via cross-couplingreactions of nitrogen, oxygen, and sulfur nucleophiles with aryl halides. Amides, amines, imidazoles, phenols, alcohols and thiols undergo reactions with aryl iodides in the presence of a base such as KOH, Cs2CO3, and K2CO3 at moderate temperature. The procedure is simple, general, ligand-free, and efficient to afford the
通过氮,氧和硫亲核试剂与芳基卤化物的交叉偶联反应,已研究了CuO纳米颗粒的C-N,C-O和C-S键形成。酰胺,胺,咪唑,酚,醇和硫醇在中等温度下在碱(例如KOH,Cs 2 CO 3和K 2 CO 3)存在下与芳基碘化物反应。该过程简单,通用,无配体且有效地以高收率提供了交叉偶联的产物。
Unique copper–salen complex: an efficient catalyst for N-arylations of anilines and imidazoles at room temperature
作者:Ankur Gogoi、Gayatri Sarmah、Anindita Dewan、Utpal Bora
DOI:10.1016/j.tetlet.2013.10.084
日期:2014.1
activity of a unique Cu–salen type complex in N-arylation of anilines with arylboronic acids in water. The protocol is found to be applicable for a wide range of electronically diversified arylboronic acids and anilines with excellent yields of the isolated product. Further the scope of this protocol has been extended to the synthesis of various N-aryl imidazoles in iso-propanol.
Carbothioamide as Highly Efficient Ligand for Copper-catalyzed Room Temperature Chan-Lam Cross-Coupling Reaction
作者:Jayantajit Baruah、Kongkona Gogoi、Anindita Dewan、Geetika Borah、Utpal Bora
DOI:10.1002/bkcs.11248
日期:2017.10
The catalytic activity of three N,S‐donor ligands, viz L1 [2‐(4‐methoxybenzylidene)‐N‐phenylhydrazinecarbothioamide], L2 [2,2′‐(1,2‐diphenylethane‐1,2‐diylidene)bis(hydrazinecarbothioamide)] and L3 [2‐(4‐methoxybenzylidene)hydrazinecarbothioamide] has been reported for N‐arylation of imidazoles with arylboronicacids in ethanol at room temperature. The method was found to be applicable in N‐arylation
A triazine-phosphite polymeric ligand bearing cage-like P,N-ligation sites: an efficient ligand in the nickel-catalyzed amination of aryl chlorides and phenols
A novel P,N-ligand was introduced for efficient Ni-catalyzed amination of aryl chlorides. Reaction of cyanuric acid (1,3,5-triazine-2,4,6-triol) and trichlorophosphine (PCl3) resulted in the production of a new porous material (TPPM) containing triazine rings with phosphite moieties in a sheet morphology. Cavities in the prepared compound create sites on the surface of the material with appropriate
The present invention provides a compound having a PDE2A selective inhibitory action, which is useful as an agent for the prophylaxis or treatment of schizophrenia, Alzheimer's disease and the like.
The present invention is a compound represented by the formula (1):
wherein each symbol is as described in the specification, or a salt thereof.