Category: pyridine-derivatives

Grozinger, K. G. published the artcileSynthesis of nevirapine and its major metabolite, COA of Formula: C6H7ClN2, the main research area is nevirapine preparation metabolite.

Several synthetic methods were developed during the process optimization for the large scale synthesis of nevirapine, a non-nucleoside inhibitor of HIV-1 reverse transcriptase. The synthesis of its putative major metabolite 11-cyclopropyl-5,11-dihydro-4-hydroxymethyl-6H-[3,2-b:2′,3′-e][1,4]diazepin-6-one and its oxidation to the corresponding aldehyde, were described.

Journal of Heterocyclic Chemistry published new progress about nevirapine preparation metabolite. 133627-45-9 belongs to class pyridine-derivatives, name is 2-Chloro-4-methylpyridin-3-amine, and the molecular formula is C6H7ClN2, COA of Formula: C6H7ClN2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Kaur, Prabhleen published the artcileA comparative study of transdermal nitroglycerine patch and oral nifedipine in preterm labor., Formula: C17H18N2O6, the main research area is Nifedipine; nitroglycerine patch; preterm labor.

Background: Currently, the main goal for the use of tocolytic therapy is to delay the birth so as to allow the use of corticosteroids for accelerating fetal lung maturity and maternal transfer to a tertiary care center and thereby reducing neonatal morbidity and mortality. Aims and Objectives: The aims amd objectives were to compare the safety and efficacy of transdermal nitroglycerine patch with oral nifedipine as a tocolytic agent to arrest preterm labor and prevent preterm birth. Materials and Methods: Based on the selection criteria, 50 patients were selected randomly in Group A and Group B. Group A women were given transdermal nitroglycerin patch, which delivered 10 mg Nitroglycerin (NTG) over 24 h and it was applied to the woman’s abdomen followed by another patch of 10 mg after 1 h if contractions persisted. After 24 h, it was replaced by a fresh patch. Group B women were given an oral loading dose of nifedipine 20 mg followed by a similar dose if contractions persisted after 1 h. A maintenance dose of 10 mg thrice daily was given if contractions were suppressed. Patients were monitored from the time of admission to the time of discharge. Results: The mean duration of prolongation of pregnancy in Group B (3.68 ± 1.91 days) was significantly more than Group A (2.78 ± 1.39 days). Headache was seen significantly more in Group A (42%) than group B (6%). Tachycardia, hypotension, and palpitation showed no statistically significant difference between them. There was no statistically significant difference in the birth weight of the babies in both the groups. Conclusion: Nifedipine is a safe and effective drug in prolonging preterm labor and has minimal maternal and neonatal side effects.

Annals of African medicine published new progress about Nifedipine; nitroglycerine patch; preterm labor. 21829-25-4 belongs to class pyridine-derivatives, name is Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, and the molecular formula is C17H18N2O6, Formula: C17H18N2O6.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Friedlander, Edwa published the artcileCumulative Risk of the Oxytocin Receptor Gene Interacts with Prenatal Exposure to Oxytocin Receptor Antagonist to Predict Children’s Social Communication Development., Quality Control of 21829-25-4, the main research area is OXTR; autism spectrum disorder; gene-environment interaction; oxytocin; oxytocin receptor antagonist; oxytocin receptor gene.

Compelling evidence for the far-reaching role of oxytocin (OT) in social cognition and affiliative behaviors set the basis for examining the association between genetic variation in the OT receptor (OXTR) gene and risk for autism spectrum disorder (ASD). In the current study, gene-environment interaction between OXTR and prenatal exposure to either OT or OXTR antagonist (OXTRA) in predicting early social communication development was examined. One hundred and fifty-three children (age: Mâ€?â€?.32, SD =â€?.07) were assigned to four groups based on prenatal history: children whose mothers prenatally received OXTRA and Nifedipine to delay preterm labor (nâ€?â€?7); children whose mothers received Nifedipine only to delay preterm labor (nâ€?â€?5); children whose mothers received OT for labor augmentation (nâ€?â€?6), and a no intervention group (nâ€?â€?5). Participants completed a developmental assessment of intelligence quotient (IQ), adaptive behavior, and social communication abilities. DNA was extracted via buccal swab. A genetic risk score was calculated based on four OXTR single nucleotide polymorphisms (rs53576, rs237887, rs1042778, and rs2254298) previously reported to be associated with ASD symptomatology. OXTRrisk-allele dosage was associated with more severe autism diagnostics observation schedule (ADOS) scores only in the OXTRA group. In contrast, in the Nifedipine, OT, and no intervention groups, OXTRrisk-allele dosage was not associated with children’s ADOS scores. These findings highlight the importance of both genetic and environmental pathways of OT in signaling early social development and raise the need for further research in this field. Autism Res 2019, 12: 1087-1100. © 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: In the current study, we examined if the association between prenatal exposure to an oxytocin receptor antagonist (OXTRA) and autism spectrum disorder (ASD) related impairments are dependent on an individual’s genetic background for the oxytocin receptor gene (OXTR). Children who carried a greater number of risk alleles for the OXTR gene and whose mothers received OXTRA to delay preterm labor showed more ASD-related impairments. The results highlight the importance of both genetic and environmental pathways of oxytocin in shaping early social development.

Autism research : official journal of the International Society for Autism Research published new progress about OXTR; autism spectrum disorder; gene-environment interaction; oxytocin; oxytocin receptor antagonist; oxytocin receptor gene. 21829-25-4 belongs to class pyridine-derivatives, name is Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, and the molecular formula is C17H18N2O6, Quality Control of 21829-25-4.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Frydman, Benjamin published the artcilePyrroles from azaindoles. Synthesis of porphobilinogen and related pyrroles, Recommanded Product: Ethyl 5-methoxy-1H-pyrrolo[2,3-c]pyridine-2-carboxylate, the main research area is porphobilinogen pyrrole; pyrrole porphobilinogen.

A new method for the synthesis of 2-aminomethyl-3-pyrroleacetic acids is described. The condensation of 2-methoxy- and 2-benzyloxy-4-methyl-5-nitropyridine with diethyl oxalate afforded the corresponding Et o-nitropyri-dinepyruvates, which on hydrogenation were transformed into the substituted Et 6-azaindole-2-carboxylates. Cleavage of the ethers and hydrogenation of the resulting pyrrolopyridones yielded the corresponding carboxypyrrole lactams which on decarboxylation and hydrolysis gave the 2-aminomethyl-3-pyrroleacetic acids. Substitution at the C-3 position of the 6-azaindole with a propionic acid and acetic asid side chain and repetition of the above sequence gave porphobilinogen and 2-aminomethyl-3,4-pyrrolediacetic acid.

Journal of the American Chemical Society published new progress about porphobilinogen pyrrole; pyrrole porphobilinogen. 3469-63-4 belongs to class pyridine-derivatives, name is Ethyl 5-methoxy-1H-pyrrolo[2,3-c]pyridine-2-carboxylate, and the molecular formula is C11H12N2O3, Recommanded Product: Ethyl 5-methoxy-1H-pyrrolo[2,3-c]pyridine-2-carboxylate.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Saraf, Isha published the artcileForced Solid-State Oxidation Studies of Nifedipine-PVP Amorphous Solid Dispersion, Safety of Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, the main research area is PVP chain length; amorphous solid dispersion; autoxidation; chemical stability.

In the present study, the oxidative degradation behavior of nifedipine (NIF) in amorphous solid dispersions (ASDs) prepared with poly(vinyl pyrrolidone) (PVP) with a short (K30) and a long (K90) chain length was investigated. The ASDs were prepared via dry ball-milling and analyzed using Fourier transform IR (IR) spectroscopy, X-ray scattering, and differential scanning calorimetry. The ASDs were exposed to accelerated thermal-oxidative conditions using a pressurized oxygen headspace (120 °C for 1 day) and high temperatures at atm. pressure (60-120 °C for a period of 42 days). Addnl., solution-state oxidative degradation studies showed that pure NIF degrades to a greater extent than in the presence of PVP. Electronic structure calculations were performed to understand the impact of drug-polymer intermol. interactions on the autoxidation of drugs. While no drug degradation was observed in freshly prepared ASD samples, alkyl free radicals were detected via ESR (EPR) spectroscopy. The free radicals were found to be consumed to a greater extent by PVP K30- than PVP K90-based ASDs upon exposure to high oxygen pressures. This was consistent with the greater solid-state oxidative degradation of NIF observed in ASDs with PVP K30 than with PVP K90. As no drug recrystallization occurred during this study period, the lower glass-transition temperature and presumed greater mol. mobility of PVP K30 and its ASD as compared to the PVP K90 system appear to contribute to the greater drug degradation in PVP-K30-based ASDs. The extent and the rate of oxidative degradation were higher in the case of PVP-K30-based ASD as compared to that in PVP-K90-based ASD, and the overall degradation increased with an increase in temperature IR spectral anal. of drug-polymer interactions supports the electronic calculations of the oxidation process. We infer that, apart from the initial free radical content, the difference in the extent of drug-polymer intermol. interactions in ASDs and amorphous stabilization during the forced oxidation experiments contribute to the observed differences in the autoxidative reactivity of the drug in ASDs with different PVP chain lengths. Overall, the chem. degradation of NIF in ASDs with two PVP chain lengths obtained from accelerated solid-state oxidation studies was in qual. agreement with that obtained from long-term (3 years) storage under ambient conditions. The study highlights the ability of accelerated processes to determine the oxidative degradation behavior of polymeric ASDs and suggests that the polymer chain length could factor into chem. as well as phys. stability considerations.

Molecular Pharmaceutics published new progress about PVP chain length; amorphous solid dispersion; autoxidation; chemical stability. 21829-25-4 belongs to class pyridine-derivatives, name is Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, and the molecular formula is C17H18N2O6, Safety of Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Talik, Tadeusz published the artcile2-Fluoronitro-derivatives of pyridine and picolines, Name: 6-Methylpyridine-2,5-diamine, the main research area is pyridine fluoro nitro; picoline fluoro nitro; diazotization aminopyridine.

6-Fluoro derivatives from 4-nitro- and 3,5- and 3,4-dinitropyridine, 3- and 5-nitro- and 3,5-dinitro-4-picoline, 3- and 5-nitro- and 3,5-dinitro-2-picoline, and 5-nitro-3-picoline as well as 2-fluoro-5-nitro-3-picoline were prepared in 52.5-85% yields by diazotization of the corresponding amino derivatives in 65% HF.

Roczniki Chemii published new progress about pyridine fluoro nitro; picoline fluoro nitro; diazotization aminopyridine. 6992-84-3 belongs to class pyridine-derivatives, name is 6-Methylpyridine-2,5-diamine, and the molecular formula is C6H9N3, Name: 6-Methylpyridine-2,5-diamine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ban-Oganowska, Hanna published the artcileSynthesis and some properties of 3-halo-4-nitro-2,6-dimethylpyridine N-oxides, Quality Control of 33259-24-4, the main research area is pyridine oxide halo nitro; substitution halonitropyridine; reduction nitropyridine oxide.

3-Halo-2,6-dimethylpyridines were oxidized by MeCO2OH and nitrated to give the pyridines I (R = Cl, Br, iodo). The substitution of R and NO2 group was investigated. With MeONa, the NO2 group in I was exchanged for OMe, and with PCl3, for Cl. In I (R = iodo) only the NO2 group was reduced by PCl3, and PBr3. Reduction with Fe2+ in AcOH gave amino derivatives

Roczniki Chemii published new progress about pyridine oxide halo nitro; substitution halonitropyridine; reduction nitropyridine oxide. 33259-24-4 belongs to class pyridine-derivatives, name is 3-Bromo-2,6-dimethylpyridin-4-amine, and the molecular formula is C7H9BrN2, Quality Control of 33259-24-4.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Kim, Sung Eun published the artcileComparison of calcium-channel blockers for long-term clinical outcomes in patients with vasospastic angina., COA of Formula: C17H18N2O6, the main research area is Calcium channel blockers; Coronary vasospasm; Patient outcome assessment.

BACKGROUND/AIMS: Calcium channel blockers (CCBs) are the most widely prescribed medication for patients with vasospastic angina (VA). However, few studies have compared the prognosis of VA patients who are prescribed different CCBs. METHODS: We enrolled 2,960 patients who received provocation test prospectively in 11 university hospitals in Korea. We divided 1,586 patients received four major CCBs into two groups: a first generation CCB (diltiazem and nifedipine) group and a second generation CCB (amlodipine and benidipine) group. Primary outcome was time to events of composite of death from any cause, acute coronary syndrome (ACS) and symptomatic arrhythmia during 3-year follow-up. We also compared the effect of each CCB on the control of angina symptoms. RESULTS: There was no difference of the primary outcome among the two groups with a cumulative incidence rate of 5.4%, 2.9%, and a person-month incidence rate of 2.33 and 1.26, respectively (hazard ratio [HR], 0.54; 95% confidence interval [CI], 0.25 to 1.17; p = 0.120, as reference with the 1st generation CCBs). The incidence of ACS was significantly lower in 2nd generation CCBs group with a person-month incidence rate of 1.66 vs. 0.35 (HR, 0.22; 95% CI, 0.05 to 0.89; p = 0.034). Use of benidipine showed a significant better control of angina symptom compared with diltiazem for 3 years (odds ratio, 0.17; 95% CI, 0.09 to 0.32; p < 0.0001 at 3rd year). CONCLUSION: The first and second generation CCB groups did not differ in terms of composite outcome occurrence. However, the ACS incidence rate was significantly lower in the users of the 2nd generation CCBs. The Korean journal of internal medicine published new progress about Calcium channel blockers; Coronary vasospasm; Patient outcome assessment. 21829-25-4 belongs to class pyridine-derivatives, name is Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, and the molecular formula is C17H18N2O6, COA of Formula: C17H18N2O6.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Archana, G. M. published the artcileAssays for L-type voltage gated calcium channels, Synthetic Route of 21829-25-4, the main research area is Calcium imaging; Drug discovery; End-point assay for calcium channel; HEK-293; L-type voltage gated calcium channel; VGCC assay.

Voltage gated calcium channels (VGCCs) are pursued as drug targets for neurodegenerative and cardiovascular diseases. High throughput drug screening targeting VGCCs depends on patch-clamp electrophysiol. or fluorophore-based calcium imaging that requires powerful equipment and specialized expertise thus leading to cost escalation. Moreover, VGCC needs to be transfected into cell lines such as HEK-293. We report the presence of L-type VGCC (L-VGCC) subunit proteins, Cav1.2, α2δ and β in HEK-293 cells and the application of simple methods for its assay. Endogenous expression of the channel in HEK-293 cells overcomes the need for transfection. L-VGCC in HEK-293 cells was activated either by the agonist, BayK8644 or by KCl-mediated depolarization. Activity was detected using the calcium sensing probe, GCaMP6m by live imaging. L-VGCC activity induced enhancement in GCaMP6m fluorescence returned to baseline corresponding to channel-closure. Activity was also shown using a methodol. involving end-point detection of the calcium dependent interaction of α-CaMKII with NMDA receptor subunit GluN2B sequence. This methodol. further simplifies the assay as it eliminates the need for real time imaging. Activation was blocked by the specific L-type VGCC antagonist, nifedipine. Finding the protein and activity of L-VGCC in HEK-293 cells offers com. viable assays for drug screening.

Analytical Biochemistry published new progress about Calcium imaging; Drug discovery; End-point assay for calcium channel; HEK-293; L-type voltage gated calcium channel; VGCC assay. 21829-25-4 belongs to class pyridine-derivatives, name is Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, and the molecular formula is C17H18N2O6, Synthetic Route of 21829-25-4.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Engin, Seckin published the artcileThe inhibitory effect of trimetazidine on detrusor contractility – a potential repositioning of trimetazidine for the treatment of overactive bladder., Name: Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, the main research area is calcium; detrusor; fura-2; ion channels; isolated tissue bath; trimetazidine.

OBJECTIVES: This study aimed to identify the effect of trimetazidine (TMZ), an antianginal drug, on detrusor smooth muscle (DSM) contractility and its possible mechanisms of action. METHODS: We performed in-vitro contractility studies on isolated mouse DSM strips and investigated the effect of TMZ on Ca2+ levels in fura-2-loaded A7r5 cells. KEY FINDINGS: TMZ (300 or 1000 µM) inhibited carbachol (CCh)- and KCl-induced contractions and produced a concentration-dependent (10-1000 µM) relaxation in KCl-precontracted DSM strips. TMZ-induced relaxation was markedly decreased by BaCl2, an inward-rectifying K+ channel blocker, but was not altered by preincubation with tetraethylammonium, glibenclamide, 4-aminopyridine, propranolol, L-NAME or methylene blue. TMZ (300 or 1000 µM) reduced both the CaCl2-induced contraction of depolarized DSM strips under Ca2+-free conditions and the CCh-induced contraction of DSM strips preincubated with nifedipine in Ca2+-containing Krebs solution. Furthermore, TMZ (1000 µM) significantly decreased the Ca2+ levels in fura-2-loaded A7r5 cells. CONCLUSIONS: TMZ decreased DSM contractility and caused a concentration-dependent relaxation of the tissue possibly through its actions on Ca2+ transients and K+ channels. Our results provide preclinical evidence that TMZ would be a potential candidate to treat disorders related to the overactivity of the bladder.

The Journal of pharmacy and pharmacology published new progress about calcium; detrusor; fura-2; ion channels; isolated tissue bath; trimetazidine. 21829-25-4 belongs to class pyridine-derivatives, name is Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, and the molecular formula is C17H18N2O6, Name: Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem