Month: October 2022

Tupitsyn, I. F.; Zatsepina, N. N.; Kolodina, N. S.; Kirova, A. V. published the artcile< Nuclear quadrupole resonance and infrared spectroscopic studies of electron interactions in polysubstituted azines>, HPLC of Formula: 6554-61-6, the main research area is NQR nitrogen heterocycle chlorine; pyridine pyrimidine NQR IR; substituent effect NQR IR pyridine.

35Cl NQR frequencies (νCl) and integral intensities (A) of ir absorption bands of stretching vibrations of aromatic C-H bonds of polysubstituted N heterocycles, e.g., chloropyridines, chloropyrimidines, were correlated with inductive and resonance substituent constants Electronic effects of the heteroatoms and substituents on νCl and A were additive.

Reaktsionnaya Sposobnost Organicheskikh Soedinenii published new progress about IR spectra. 6554-61-6 belongs to class pyrimidines, and the molecular formula is C4H2Cl2N2, HPLC of Formula: 6554-61-6.

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Jordan, Brian J.; Carroll, Joseph B.; Xu, Hao; Erdogan, Belma; Lee, Lisa; Cheng, Lily; Tiernan, Chris; Cooke, Graeme; Rotello, Vincent M. published the artcile< Site isolated redox behavior in flavin functionalized random polystyrene copolymers>, HPLC of Formula: 2244-11-3, the main research area is flavin functionalized random polystyrene copolymer.

A model system has been developed to investigate the individual redox behaviors of flavin derivatives appended onto random polystyrene copolymers through “”click”” chem. procedures. The results indicate that flavin units attached to the polymers exhibit site isolated behavior vs. free flavin, yielding unique fluorescent materials with electrochem. tunable associations upon addition of complementary diamidopyridine functionality.

Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) published new progress about Cyclic voltammetry. 2244-11-3 belongs to class pyrimidines, and the molecular formula is C4H4N2O5, HPLC of Formula: 2244-11-3.

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Reddy, L. Srikanth; Naik, B. Eswar published the artcile< Design, synthesis and characterization of novel thieno[2,3-d]pyrimidines for anti-bacterial and anti-fungal screening>, Quality Control of 18740-39-1, the main research area is thiomorpholinothieno pyrimidine preparation antibacterial antifungal.

A series of novel 4-Substituted and different substituted heterocyclic-N-(2-thiomorpholinothieno[2,3-d]pyrimidin-4-yl)benzamide derivatives I (R = Ph, thiophen-2-yl, 2,5-difluorophenyl, etc.) was synthesized by a facile five-step procedure that afforded advantages of mild reaction conditions, simple protocol and good yields. The final compounds were screened for their antibacterial activity against Staphylococcus aureus (S. aureus) and Bacillus subtilis (B. subtilis) from Gram pos. group of bacteria and Pseudomonas aeruginosa (P. aeruginosa) and Escherichia coli (E. coli) from Gram neg. group of bacteria and antifungal activity against Aspergillus niger (A. niger) and Candida albicans (C. albicans). Anti-bacterial and anti-fungal activities were evaluated and compared with the standard drugs Such as Amoxicillin and Fluconazole from anti-bacterial and antifungal activity screening results, and it has been observed that compounds I (R = thiophen-2-yl, 1-benzothiophen-2-yl, 2,5-difluorophenyl, 4-(trifluoromethyl)phenyl) possess good activity.

Pharma Innovation published new progress about Antibacterial agents. 18740-39-1 belongs to class pyrimidines, and the molecular formula is C6H2Cl2N2S, Quality Control of 18740-39-1.

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Rabal, Obdulia; Sanchez-Arias, Juan A.; Cuadrado-Tejedor, Mar; de Miguel, Irene; Perez-Gonzalez, Marta; Garcia-Barroso, Carolina; Ugarte, Ana; Estella-Hermoso de Mendoza, Ander; Saez, Elena; Espelosin, Maria; Ursua, Susana; Tan, Haizhong; Wu, Wei; Xu, Musheng; Pineda-Lucena, Antonio; Garcia-Osta, Ana; Oyarzabal, Julen published the artcile< Multitarget Approach for the Treatment of Alzheimer's Disease: Inhibition of Phosphodiesterase 9 (PDE9) and Histone Deacetylases (HDACs) Covering Diverse Selectivity Profiles>, Related Products of 89793-12-4, the main research area is Alzheimer’s disease HDAC inhibition PDE9 inhibition HDAC6 dual inhibitors; Alzheimer’s disease; HDAC6; dual inhibitors; histone deacetylase inhibition; phosphodiesterase 9 inhibition.

Here, we present a series of dual-target phosphodiesterase 9 (PDE9) and histone deacetylase (HDAC) inhibitors devised as pharmacol. tool compounds for assessing the implications of these two targets in Alzheimer’s disease (AD). These novel inhibitors were designed taking into account the key pharmacophoric features of known selective PDE9 inhibitors as well as privileged chem. structures, bearing zinc binding groups (hydroxamic acids and ortho-amino anilides) that hit HDAC targets. These substituents were selected according to rational criteria and previous knowledge from our group to explore diverse HDAC selectivity profiles (pan-HDAC, HDAC6 selective, and class I selective) that were confirmed in biochem. screens. Their functional response in inducing acetylation of histone and tubulin and phosphorylation of cAMP response element binding (CREB) was measured as a requisite for further progression into complete in vitro absorption, distribution, metabolism and excretion (ADME) and in vivo brain penetration profiling. Compound 31b, a selective HDAC6 inhibitor with acceptable brain permeability, was chosen for assessing in vivo efficacy of these first-in-class inhibitors, as well as studying their mode of action (MoA).

ACS Chemical Neuroscience published new progress about Alzheimer disease. 89793-12-4 belongs to class pyrimidines, and the molecular formula is C7H7ClN2O2, Related Products of 89793-12-4.

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Kang, Dongwei; Fang, Zengjun; Huang, Boshi; Lu, Xueyi; Zhang, Heng; Xu, Haoran; Huo, Zhipeng; Zhou, Zhongxia; Yu, Zhao; Meng, Qing; Wu, Gaochan; Ding, Xiao; Tian, Ye; Daelemans, Dirk; De Clercq, Erik; Pannecouque, Christophe; Zhan, Peng; Liu, Xinyong published the artcile< Structure-Based Optimization of Thiophene[3,2-d]pyrimidine Derivatives as Potent HIV-1 Non-nucleoside Reverse Transcriptase Inhibitors with Improved Potency against Resistance-Associated Variants>, Synthetic Route of 18740-39-1, the main research area is thiophene pyrimidine preparation structure based optimization antiviral HIV; HIV antiviral pharmacokinetics cardiotoxicity thiophene pyrimidine.

This work follows on from our initial discovery of a series of piperidine-substituted thiophene[3,2-d]pyrimidine HIV-1 non-nucleoside reverse transcriptase inhibitors (NNRTI) (J. Med. Chem. 2016, 59, 7991-8007). In the present study, we designed, synthesized, and biol. tested several series of new derivatives in order to investigate previously unexplored chem. space. Some of the synthesized compounds displayed single-digit nanomolar anti-HIV potencies against wild-type (WT) virus and a panel of NNRTI-resistant mutant viruses in MT-4 cells. I was exceptionally potent against the whole viral panel, affording 3-4-fold enhancement of in vitro antiviral potency against WT, L100I, K103N, Y181C, Y188L, E138K, and K103N+Y181C and 10-fold enhancement against F227L+V106A relative to the reference drug etravirine (ETV) in the same cellular assay. The structure-activity relationships, pharmacokinetics, acute toxicity, and cardiotoxicity were also examined Overall, the results indicate that I is a promising new drug candidate for treatment of HIV-1 infection.

Journal of Medicinal Chemistry published new progress about Acute toxicity. 18740-39-1 belongs to class pyrimidines, and the molecular formula is C6H2Cl2N2S, Synthetic Route of 18740-39-1.

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Chukwu, Roxton; Hunter, Allen D.; Santarsiero, Bernard D. published the artcile< Organometallic complexes with electronic bridges. 6. Novel organometallic complexes containing aromatic azines: synthesis and x-ray crystal structure of 4,6-bis[(η5-cyclopentadienyl)dicarbonyliron] 2-(methylthio)pyrimidine>, Category: pyrimidines, the main research area is iron azine complex; pyridine iron complex; pyrazine iron complex; pyridazine iron complex; pyrimidine iron complex; crystal structure iron pyrimidine complex; mol structure iron pyrimidine complex; safety handling mercury.

The syntheses of 13 monometallic and 4 bimetallic complexes in which (η5-C5H5)Fe(CO)2 (Fp; C5H5 = cyclopentadienyl) groups are bound to substituted pyridine, pyrazine, pyridazine, and pyrimidine rings is described. These species are prepared by metathesis reactions between the appropriate number of equivalent of NaFp and the chloro- or fluoro-substituted azine precursors in 25-95% yields and structural factors affecting these yields are discussed. These new materials have been fully characterized by conventional spectroscopic techniques and are shown to contain Fe-C σ-bonds. The x-ray crystal structure of the title complex confirms that it has the expected structure about the pyrimidine ring. It also reveals that, contrary to expectations from frontier MO theory, the (η5-C5H5)Fe(CO)2 groups shows a preference for orientations in which its mirror plane is perpendicular to that of the pyrimidine ring. The spectroscopic data provide no evidence for the existence of any electronic interaction between the metal centers of the new bimetallic azine bridged complexes having meta substitution geometries.

Organometallics published new progress about Crystal structure. 3921-01-5 belongs to class pyrimidines, and the molecular formula is C4H2Br2N2, Category: pyrimidines.

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Zasosov, V. A.; Nikulina, T. N.; Blinova, L. S.; Onoprienko, V. S.; Sycheva, V. N.; Sokolova, G. N.; Borodina, K. S.; Denisova, K. V. published the artcile< Synthesis of 4-(p-aminobenzenesulfonamido)-5,6-dimethoxypyrimidine>, Synthetic Route of 5018-38-2, the main research area is amino benzenesulfonamido methoxy pyrimidine; sulfamide pyrimidyl.

CO2H)2 was esterified with MeOH and then treated with MeOCH2CO2CO2Me(from ClCH2CO2Me and NaOMe) to give MeO2CCH(OMe)COCO2Me, which was decarbonylated at 210° to give MeOCH(CO2Me)2. The latter reacted with NH3 and then HCONH2 in the presence of NaOEt to form the di-Na salt of 4,6-dihydroxy-5-methoxypyrimidine, which was converted to the 4,6-dichloro derivative (I) with POCl3 and PhNMe2. I reacted with NH3 in DMF to form the 4-amino derivative, which yielded 4-amino-5,6-dimethoxypyrimidine with NaOH in MeOH. The latter was converted to the title compound (II) by treatment with 4-MeO2CNHC6H4SO2Cl in pyridine, followed by hydrolysis with concentrated HCl.

Khimiko-Farmatsevticheskii Zhurnal published new progress about 5018-38-2. 5018-38-2 belongs to class pyrimidines, and the molecular formula is C5H4Cl2N2O, Synthetic Route of 5018-38-2.

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Pithova, P.; Sorm, F. published the artcile< Influence of some derivatives and structural analogs of pyrimidine and purine bases on the degradation of uracil>, Safety of 6-Bromo-1,2,4-triazine-3,5(2H,4H)-dione, the main research area is .

The enzymic degradation of uracil (I) by rat liver Me2CO powder is inhibited by compounds possessing the NHCONH grouping in a 6-membered ring. Their activity, however, disappears on methylation of N. Xanthine, uric acid, orotie acid, 2-pyridone, and 5-bromo-6-azauracil inhibit the 1st stage of I degradation, viz., its reduction to dihydrouraeil (II). The inhibitory action of 5-substituted I derivatives is apparently of competitive character. None of the above compounds, however, inhibits the degradation of II and no accumulation of β-ureidopropionie acid and β-alanine was detected in the reaction mixture

Collection of Czechoslovak Chemical Communications published new progress about 4956-05-2. 4956-05-2 belongs to class pyrimidines, and the molecular formula is C3H2BrN3O2, Safety of 6-Bromo-1,2,4-triazine-3,5(2H,4H)-dione.

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Kang, Dongwei; Feng, Da; Sun, Yanying; Fang, Zengjun; Wei, Fenju; De Clercq, Erik; Pannecouque, Christophe; Liu, Xinyong; Zhan, Peng published the artcile< Structure-Based Bioisosterism Yields HIV-1 NNRTIs with Improved Drug-Resistance Profiles and Favorable Pharmacokinetic Properties>, Related Products of 18740-39-1, the main research area is thiophenepyrimidine piperidine substituted preparation antiHIV activity.

The development of efficacious NNRTIs for AIDS therapy commonly encountered the rapid generation of drug-resistant mutations, which becomes a major impediment to effective anti-HIV treatment. Using a structure-based bioisosterism strategy, a series of piperidine-substituted thiophene[2,3-d]pyrimidine derivatives were designed and synthesized. Compound I yielded the greatest potency, exhibiting significantly better anti-HIV-1 activity than ETR against all of the tested NNRTI-resistant HIV-1 strains. In addition, the phenotypic (cross)resistance of I and other NRTIs to the different selected HIV-1 strains was evaluated. As expected, no phenotypic cross-resistance against the NRTIs (AZT and PMPA) was observed with the mutant Ires strain. Furthermore, I was identified with improved solubility, lower CYP liability, and hERG inhibition. Remarkably, I exhibited optimal pharmacokinetic properties in rats (F = 37.06%) and safety in mice (LD50 > 2000 mg/kg), which highlights I as a promising anti-HIV-1 drug candidate.

Journal of Medicinal Chemistry published new progress about Anti-HIV agents. 18740-39-1 belongs to class pyrimidines, and the molecular formula is C6H2Cl2N2S, Related Products of 18740-39-1.

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Ferris, J. P.; Joshi, P. C.; Lawless, J. G. published the artcile< Chemical evolution. XXIX. Pyrimidines from hydrogen cyanide>, Related Products of 15837-41-9, the main research area is pyrimidine formation prebiosis; hydrogen cyanide pyrimidine formation.

Dilute (0.1M) solutions of HCN condensed to oligomers at pH 8-9. Hydrolysis of these oligomers at pH 8.5 or with 6N HCl yielded 4,5-dihydroxypyrimidine as the most abundant pyrimidine product along with orotic acid and 5-hydroxyuracil. Thus, the 3 major N-containing classes of biomols. could have originated from HCN on the primitive earth. The observation of the formation of orotic acid and 4-aminoimidazole-5-carboxamide by the hydrolysis of the HCN oligomers suggested that once the initially formed pyrimidines and purines were consumed, those life forms persisted which evolved enzymes for the conversion of these intermediates to the pyrimidines and purines present in contemporary RNA.

BioSystems published new progress about Molecular evolution. 15837-41-9 belongs to class pyrimidines, and the molecular formula is C4H4N2O2, Related Products of 15837-41-9.

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia