ChemInform Abstract: STUDY OF HETEROCYCLIC COMPOUNDS. VIII. HETEROARYLCARBOXAMIDES AND ACETAMIDES AND THEIR ANTIINFLAMMATORY ACTIVITY

Abstract

2‐Amino‐pyridine (I), Z‐Amino‐thiazole (VIII) bzw. 2‐Amino‐benzothiazole (XIII) reagieren mit Brombrenz‐ traubensäureester (II) bzw. Brom‐acetessigsäureester (V) zu Imidazolo‐pyridinen (III) und (IV), Imidazolo‐thiazolen (IX) und (XI) sowie Imidazolo‐benzothiazolen (XIV) und (XVI), welche mit Ammoniak zu den entsprechenden Amiden umgesetzt werden können.

Carbazole‐Linked 1,2,3‐Triazoles: In Vitro β‐Glucuronidase Inhibitory Potential, Kinetics, and Molecular Docking Studies

“…To further correlate the mixed‐type inhibition mode, the compound 23 was docked to other binding pockets, which may be considered as non‐competitive or allosteric sites explored with shape descriptors. The ligand binding‐sites analysis produced top five (5) potential binding pockets, including the main active site region, represented by the catalytic residues Glu451 and Glu540, as shown in Figure …”

“…In the case of β‐glucuronidase, no crystal structure was available for the protein‐ligand complex with substrate/inhibitor. The standard compound (D‐saccharic acid 1, 4‐lactone) was thus docked independently in the active site region, composed mainly of Glu451 and Glu540 . The binding mode of the standard compound was analyzed considering the probable interactions with these two important residues.…”

“…The binding mode of the standard compound was analyzed considering the probable interactions with these two important residues. The compound formed hydrogen bonding with Glu540 at a distance of 2.82 Å, whereas other residues Asp207, His385, Asn450, Tyr508, Trp587, Arg600, and Lys606 also surrounded the inhibitor, as shown in Figure …”

“…Figure illustrates the binding between active site residues and compound 23 , showing varying nature of interactions. In the first case, the compound was allowed to bind to the active site region considering the catalytic Glu451 and Glu540 as the hotspot region . The compound was away from these catalytic residues due to absence of compatible group or moiety on the ligand.…”

Functionalization of Imidazo[1,2‐a]pyridines by Means of Metal‐Catalyzed Cross‐Coupling Reactions

“…They have also been reported as inhibitors of the apoptosis signal‐regulating kinase 1 (ASK1)29 and as 5‐lipoxygenase (5‐LO) inhibitors 30. The imidazo[1,2‐ a ]pyridine system is also present in pharmacologically important drugs, including several anxyolytics,19,31 such as Alpidem,19a,19b,31a,32 Necopidem,31b,33 Saripidem,31b,31d and Zolpidem30,30,30 (the drug used to treat insomnia) (Figure 1). Moreover, the imidazo[1,2‐ a ]pyridine derivative Olprinone is available as an inhibitor of PDE 3/436,34 whereas Zolimidine has a gastroprotective effect and is used to treat peptic ulcers 35.…”