A series of anilinophthalazine derivatives 4a–j was initially synthesized and tested for its VEGFR-2 inhibitory activity where it showed promising activity (IC50 = 0.636–5.76 μM). Molecular docking studies guidance was used to improve the binding affinity for series 4a–j towards VEGFR-2 acti...

Carboxylic acids are converted to the corresponding 4-methoxybenzyl (PMB) esters with 4-methoxybenzyl-2,2,2-trichloroacetimidate in the absence of an acid catalyst. This operationally simple procedure is a highly effective method for the formation of PMB esters. The reaction is promoted by the c...

Among the emerging new psychoactive substances (NPS), compounds carrying an N-ortho-methoxybenzyl substituent, the so-called NBOMes, represented a highly potent group of new hallucinogens. Recently, 3,4-dimethoxyamphetamine (3,4-DMA)-NBOMe and 4-methylmethamphetamine (4-MMA)-NBOMe occurred, but ...

Glycogen synthase kinase 3 (GSK-3) has become known for its multifactorial involvement in the pathogenesis of Alzheimer’s disease. In this study, a benzothiazole- and benzimidazole set of 1-aryl-3-(4-methoxybenzyl)ureas were synthesised as proposed Cys199-targeted covalent inhibitors of GSK-3β...

A series of 2-thio pyridine C-region analogues of 2-(3-fluoro-4-methylsulfonylaminophenyl)propanamides were investigated as hTRPV1 antagonists. Among them, compound 24S showed stereospecific and excellent TRPV1 antagonism of capsaicin-induced activation. Further, it demonstrated strong anti-allo...

A series of 2-aryl pyridine C-region derivatives of 2-(3-fluoro-4-methylsulfonylaminophenyl)propanamides were investigated as hTRPV1 antagonists. Multiple compounds showed highly potent TRPV1 antagonism toward capsaicin comparable to previous lead 7. Among them, compound 9 demonstrated anti-allo...

A transition-metal-free, visible-light-induced trifluoromethylation of imidazo[1,2-a]pyridines has been developed at mild conditions by employing cheap and commercially available anthraquinone-2-carboxylic acid (AQN-2-CO2H) as the photo-organocatalyst, and Langlois reagent as the trifluoromethyl...

A series of 1-substituted 3-(t-butyl/trifluoromethyl)pyrazole C-region analogues of 2-(3-fluoro-4-methylsulfonamidophenyl)propanamides were investigated for hTRPV1 antagonism. The structure activity relationship indicated that the 3-chlorophenyl group at the 1-position of pyrazole was the optimi...

A series of pyridine derivatives in the C-region of N-((6-trifluoromethyl-pyridin-3-yl)methyl) 2-(3-fluoro-4-methylsulfonylaminophenyl)propanamides were investigated as hTRPV1 antagonists. The SAR analysis indicated that 6-difluorochloromethyl pyridine derivatives were the best surrogates of the...

Free radicals and lipid peroxide (LPO), easily formed in the diabetic state, play an important role in the development of diabetic complications. Potentially, nicorandil may reduce the production of free radicals and LPO in various organs. In fact, increased LPO levels in the serum, kidney, and ...

The effects of the intravenous administration of the antianginal drug, nicorandil, 50 μg/kg administered over 2 minutes, were investigated during pacing-induced ischemia in 8 patients with coronary artery disease. Hemodynamic parameters were measured and single-plane left ventriculograms were o...

Nicorandil is a unique vasodilator that combines the actions of a potassium channel activator and a nitrovasodilator. Little literature is available on its chemical stability and pharmacokinetics in animals. We developed a simple, specific, sensitive, and precise high-performance liquid chromato...

We examined the effect of nicorandil and nipradilol on the ischemic myocardium in the isolated perfused rat heart. The heart was perfused by the working heart technique with an afterload pressure of 60 mm Hg and with a left atrial filling pressure of 9 mm Hg. Ischemia was induced for 20 min by l...

The kinetic disposition of nicorandil, N-[2-(nitroxy)ethyl]-3-pyridinecarboxamide (I), and its main metabolic product, N-[2-(hydroxy)-ethyl]-3-pyridinecarboxamide (II), was studied after administering intravenous and oral doses (2.5 mg/kg) of nicorandil to the same beagle dogs. The plasma concen...

A simple, fast, precise, specific and economical reverse phase liquid chromatographic method was developed for determination of nitrate (NIT) impurity from nicorandil (NIC) and its tablet dosage form. NIT is process impurity as well as a degradation product of NIC. This article is based on appli...

Nicorandil is an adenosine triphosphate-sensitive potassium channel opener that combines an organic nitrate and a nicotinamide group which respectively confer to nicorandil the additional properties of being a nitric oxide (NO) donor and antioxidant; it also induces vasodilation, decreases the b...

Paclitaxel-eluting stents dramatically reduce rates of in-stent restenosis; however, paclitaxel is known to lead to endothelial dysfunction. Protective effects of nicorandil on paclitaxel-induced endothelial dysfunction by examining flow-mediated dilation (FMD) were investigated in anesthetized ...

Two simple, sensitive and validated spectrophotometric methods have been described for the assay of nicorandil in drug formulations. Method A is based on the determination of nicorandil by using leuco crystal violet (LCV). Nicorandil liberates nitrite on reaction with Zn and NH4Cl, which reacts ...

C.I. Reactive Blue 2 analogues were bonded onto an agarose support matrix by a novel method which entailed immobilisation by the anthraquinone ring 1-amino group as opposed to the usual triazine ring coupling methods. Dyes with spacer arms attached to the anthraquinone ring 1-amino group were sy...

A PVA/Congo red composite film was prepared via casting technique. The effects of different concentrations of Congo red (CR) on the crystal structure and optical properties of polyvinyl alcohol (PVA) were characterized by X-ray diffraction and UV–vis spectroscopy. The PVA/CR films at different ...