Month: November 2022

Mock, Donald M. published the artcileBiotin-protein bond: instability and structural modification to provide stability for in vivo applications, SDS of cas: 359860-27-8, the publication is Methods in Molecular Biology (Totowa, NJ, United States) (2008), 209-220, database is CAplus and MEDLINE.

Biotinylation of proteins is a powerful tool for investigating biol. phenomenon, both in vitro and in vivo. Biotinylating reagents that form covalent bonds with several types of amino acid residues are com. available. However, most, if not all, of these com. available biotinylating agents produce biotin-protein bonds that are susceptible to cleavage in human plasma. Here, we describe the use of IgG as a model protein for evaluation of biotin-protein bond stability and for the investigation of the mechanism of biotin release. We also describe the synthesis of a biotin-protein bond that is stable in human plasma and a method for evaluation of that stability.

Methods in Molecular Biology (Totowa, NJ, United States) published new progress about 359860-27-8. 359860-27-8 belongs to imidazoles-derivatives, auxiliary class Other Aliphatic Heterocyclic,Chiral,Amine,Amide,Ether,Inhibitor, name is N-(2-(2-(2-(2-Aminoethoxy)ethoxy)ethoxy)ethyl)-5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamide, and the molecular formula is C18H34N4O5S, SDS of cas: 359860-27-8.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Tertov, B. A. published the artcileLithium and sodium derivatives of N-substituted 2-alkylbenzimidazoles, Application In Synthesis of 4760-35-4, the publication is Khimiya Geterotsiklicheskikh Soedinenii (1986), 1073-7, database is CAplus.

The title compounds (I; R = Me, Ph; R¹ = H, Me, Et, R² = Li, Na) were prepared in 90-6% yields by metalation of I (R¹ = H) with R³Li or R³Na (R³ = Bu, Ph, naphthyl). The preparation of other derivatives by treating I (R² = Li, Na) with Ph₂CO, PrONO₂, aldehydes, and iodides was also discussed. Thus, treating I (R = Me, R¹ = H, R² = Na) with MeI gave the corresponding I (R² = Me).

Khimiya Geterotsiklicheskikh Soedinenii published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C8H5F3O2S, Application In Synthesis of 4760-35-4.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Konieczna, Lucyna published the artcileChemometric exploration of the dependencies between molecular modeling descriptors and analytical chemistry data of antihistaminic drugs, Synthetic Route of 2508-72-7, the publication is Journal of AOAC International (2012), 95(3), 713-723, database is CAplus and MEDLINE.

The relationships between exptl. and computational descriptors of antihistamine drugs were studied using principal component anal. (PCA). Empirical data came from UV and IR spectroscopic measurements. Nonempirical data, such as structural mol. descriptors, and chromatog. data, were obtained from HyperChem software. Another objective was to test whether the parameters used as independent variables (nonempirical and empirical-spectroscopic) could lead to attaining classification similar to that developed on the basis of the chromatog. parameters. To arrive at the answer to the question, a matrix of 18 × 49 data, including HPLC and UV and IR spectroscopic data, together with mol. modeling studies, was evaluated by the PCA method. The obtained clusters of drugs were consistent with the drugs’ chem. structure classification. Moreover, the PCA method applied to the HPLC retention data and structural descriptors allowed for classification of the drugs according to their pharmacol. properties; hence it may potentially help limit the number of biol. assays in the search for new drugs.

Journal of AOAC International published new progress about 2508-72-7. 2508-72-7 belongs to imidazoles-derivatives, auxiliary class Inhibitor,Immunology/Inflammation,Histamine Receptor, name is N-Benzyl-N-((4,5-dihydro-1H-imidazol-2-yl)methyl)aniline hydrochloride, and the molecular formula is C17H20ClN3, Synthetic Route of 2508-72-7.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Sharma, Mahendra K. published the artcileCrystalline Divinyldiarsenes and Cleavage of the As:As Bond, Formula: C27H39ClN2, the publication is Chemistry – A European Journal (2019), 25(35), 8249-8253, database is CAplus and MEDLINE.

The first divinyldiarsenes [{(NHC)C(Ph)}As]₂ (NHC=IPr 3 a, SIPr 3 b; IPr=C{(NAr)CH}₂; SIPr=C{(NAr)CH₂}₂; Ar=2,6-iPr₂C₆H₃) are reported. Compounds 3 a and 3 b were prepared by the reduction of corresponding chlorides {(NHC)C(Ph)}AsCl₂ (NHC=IPr 2 a, SIPr 2 b) with Mg. Calculations revealed a small HOMO-LUMO energy gap of 3.86 (3 a) and 4.24 eV (3 b). Treatment of 3 a with (Me₂S)AuCl led to the cleavage of the As:As bond to restore 2 a, which is expected to proceed via the diarsane [{(IPr)C(Ph)}AsCl]₂ (4). Remarkably, 4 as well as 2 a can be selectively accessed on treatment of 3 a with an appropriate amount of C₂Cl₆. Moreover, 3 a readily reacts with PhEEPh (E=Se or Te) at room temperature to give {(IPr)C(Ph)}As(EPh)₂ (E=Se 5 a; Te 5 b), revealing the cleavage of As:As and E-E bonds and the formation of As-E bonds. Such highly selective stepwise oxidation (3a â†?4 â†?2a) and bond metathesis (3a â†?5a,b) reactions are unprecedented in main-group chem.

Chemistry – A European Journal published new progress about 258278-25-0. 258278-25-0 belongs to imidazoles-derivatives, auxiliary class Achiral NHCs Ligands, name is 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride, and the molecular formula is C9H22OSi, Formula: C27H39ClN2.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Nanda, Tanmayee published the artcilePalladium-Catalyzed C-C Bond Activation of Cyclopropenone: Modular Access to Trisubstituted α,β-Unsaturated Esters and Amides, Formula: C27H39ClN2, the publication is Journal of Organic Chemistry (2021), 86(3), 2682-2695, database is CAplus and MEDLINE.

Strain-driven palladium/N-heterocyclic carbene-catalyzed C-C bond activation of diphenylcyclopropenone (DPC) was explored for one-step access to trisubstituted α,β-unsaturated esters and amides. The designed transformation worked under mild conditions providing exclusively a single stereoisomer. Mechanistic studies support the oxidative addition of the C-C bond of cyclopropenone to in-situ-generated Pd(0) intermediate. Vinylic hydrogen in the product was proved that it is coming from phenol/aniline through deuterium-labeling studies. Late-stage functionalization of bioactive mols. such as procaine, estrone, and hymecromone demonstrated the robustness of this protocol.

Journal of Organic Chemistry published new progress about 258278-25-0. 258278-25-0 belongs to imidazoles-derivatives, auxiliary class Achiral NHCs Ligands, name is 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydro-1H-imidazol-3-ium chloride, and the molecular formula is C27H39ClN2, Formula: C27H39ClN2.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Chan, Pak published the artcileCompatibility of ceftobiprole medocaril with selected drugs during simulated Y-site administration, Formula: C17H18N3NaO3S, the publication is American Journal of Health-System Pharmacy (2008), 65(16), 1545-1551, database is CAplus and MEDLINE.

Purpose: The phys. compatibility of the new cephalosporin ceftobiprole medocaril with 70 other drugs during simulated Y-site injection was studied. Methods: Ceftobiprole was reconstituted with sterile water for injection. Dilutions of ceftobiprole 2 mg/mL (as ceftobiprole medocaril 2.67 mg/mL) were prepared in 5% dextrose injection, 0.9% sodium chloride injection, and lactated Ringer’s injection. For testing compatibility with the other drugs, a 5-mL sample of the ceftobiprole 2-mg/mL admixtures was combined with a 5-mL sample of the other drug either undiluted or diluted with one of the three vehicles. Each combination was prepared in duplicate, switching the order of drug addition, and kept at room temperature At intervals up to four hours after preparation, samples were examined visually and with the aid of a Tyndall beam and measured with a turbidimeter and a particle sizer and counter. Compatibility with propofol was evaluated by checking for emulsion separation and particles after centrifugation. Results: In all three vehicles, ceftobiprole was compatible with 31 other drugs and incompatible with 32. With 7 drugs, compatibility was dependent on the vehicle used. Signs of incompatibility included the presence of visible and subvisible particles, haze, and turbidity. No incompatibilities were related to the order of mixing. Conclusion: Of the 70 drugs evaluated for compatibility with ceftobiprole 2 mg/mL (as medocaril) in 5% dextrose injection, 0.9% sodium chloride injection, and lactated Ringer’s injection, 31 were found to be compatible and 32 were found to be incompatible in all three of the infusion solutions For 7 of the drugs, compatibility was dependent on which infusion solution was used. Ceftobiprole medocaril should not be simultaneously administered via a Y site with drugs with which it was shown to be incompatible.

American Journal of Health-System Pharmacy published new progress about 161796-78-7. 161796-78-7 belongs to imidazoles-derivatives, auxiliary class Membrane Transporter/Ion Channel,Proton Pump, name is Sodium (S)-6-methoxy-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)benzo[d]imidazol-1-ide, and the molecular formula is C17H18N3NaO3S, Formula: C17H18N3NaO3S.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Butt, Fayaz Ahmad published the artcileImidazolium Based Surface Active Ionic Liquids: Promising Boosters to Enhance the Radical Scavenging and Antioxidant Activity of Conventional Surfactant Solubilised Quercetin, Computed Properties of 79917-90-1, the publication is Catalysis Letters (2022), 152(5), 1276-1285, database is CAplus.

Surface Active Ionic Liquids (SAILs) are emerging as promising alternatives to conventional amphiphiles. Their unique specialties endow the SAIL/SAIL plus conventional surfactant based micellar/mixed micellar systems with unique solubilization, catalytic and electrocatalytic properties. Herein we demonstrate that as a partner of conventional surfactant based mixed micellar systems, imidazolium based SAILs significantly boost the radical scavenging activity (RSA) and antioxidant activity of water insoluble flavonoids. Specifically, we report the RSA and antioxidant activity kinetics of quercetin toward 1,1-diphenyl-2-picrylhydrazyl (DPPH) in aqueous micellar media of SAIL, 1-Butyl-3-methyl-imidazolium dodecylsulfate (BMIMDS), its conventional anionic surfactant analog-sodium dodecylsulfate (SDS), conventional nonionic surfactant-Brij56 and the variedly composed BMIMDS plus Brij56 mixed micellar solutions The presented results clearly suggest that in comparison to the conventional micellar systems, the radical scavenging ability and activity of quercetin for DPPH is appreciably better in appropriately composed SAIL plus conventional surfactant mixed micellar systems. These results further suggest that the RSA of quercetin toward DPPH is a function of its aqueous phase to micellar phase partitioning, locus of solubilization and more importantly its orientation vis-a-vis the later within the micelles. The 1:1 Brij56 plus BMIMDS mixed micellar system seems to offer the best environs for the optimal RSA and kinetics for antioxidant activity of quercetin toward DPPH. The kinetic details and the mechanistic insights presented herein shall stimulate an intense research activity toward use of SAIL and SAIL based micellar systems as promising delivery systems for water insoluble flavonoids for their potential applications as pharmaceuticals and food ingredients.

Catalysis Letters published new progress about 79917-90-1. 79917-90-1 belongs to imidazoles-derivatives, auxiliary class Ionic Liquid,Ionic Liquid, name is 3-Butyl-1-methyl-1H-imidazol-3-ium chloride, and the molecular formula is C8H15ClN2, Computed Properties of 79917-90-1.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

McReynolds, Katherine D. published the artcileNon-Natural glycosphingolipids and structurally simpler analogues bind HIV-1 recombinant Gp120, Recommanded Product: N-(2-(2-(2-(2-Aminoethoxy)ethoxy)ethoxy)ethyl)-5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamide, the publication is Bioorganic & Medicinal Chemistry (2002), 10(3), 625-637, database is CAplus and MEDLINE.

Interactions of recombinant gp120 (rgp120) with non-natural glycosphingolipids (GSLs) and structurally simpler analogs (e.g., I) have been studied using a competitive adhesion assay. Conjugates of cellobiosyl ceramide and melibiosyl ceramide were synthetically prepared as water-soluble GSL analogs. These ligands were screened against a panel of biol. relevant analogs, and the results show that their interactions with rgp120 are comparable to natural cellular receptors. Glycolipid interactions with rgp120 were probed further by the synthesis and testing of structurally simpler analogs that were obtained by reductive amination of lactose, cellobiose, and melibiose with a biotinylated amino ethylene glycol moiety. RGp120 did not recognize conjugates lacking a lipid component. However, palmitoylation of the secondary amino alditols yielded compounds with comparable rgp120 affinity to the natural cellular receptor, galactosyl ceramide (GalCer). Taken together, the SAR showed that both a hydrophobic and a hydrophilic component are required for rgp120 recognition. Moreover, structural variability in the carbohydrate headgroup did not significantly alter rgp120 recognition indicating that this interaction is not highly specific.

Bioorganic & Medicinal Chemistry published new progress about 359860-27-8. 359860-27-8 belongs to imidazoles-derivatives, auxiliary class Other Aliphatic Heterocyclic,Chiral,Amine,Amide,Ether,Inhibitor, name is N-(2-(2-(2-(2-Aminoethoxy)ethoxy)ethoxy)ethyl)-5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamide, and the molecular formula is C18H34N4O5S, Recommanded Product: N-(2-(2-(2-(2-Aminoethoxy)ethoxy)ethoxy)ethyl)-5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamide.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Amrutkar, Sunil V. published the artcileSynthesis and antifungal activity of 1-alkyl/H-2-[(4-alkyl/aryl-piperazin-1-yl)-methyl]-benzimidazole derivatives, Computed Properties of 4760-35-4, the publication is International Journal of Pharmacy and Pharmaceutical Sciences (2010), 2(2), 84-92, database is CAplus.

Substituted benzimidazoles were condensed with various substituted piperazine to synthesize a library of benzimidazole derivatives Thus, 2-(chloromethyl)benzimidazoles were prepared from appropriate 1,2-phenylenediamines by boiling for 8 h with ClCH₂CO₂H in concentrated HCl. Subsequent condensation with piperazines was achieved by boiling in dioxane with Et₃N as base. The antifungal activity of the synthesized compounds was studied by disk diffusion against Candida albicans using ketoconazole as reference standard The compound showed antifungal activity comparable to ketoconazole.

International Journal of Pharmacy and Pharmaceutical Sciences published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C9H9ClN2, Computed Properties of 4760-35-4.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Mylari, Banavara L. published the artcilePotent, orally active aldose reductase inhibitors related to zopolrestat: surrogates for benzothiazole side chain, Computed Properties of 4760-35-4, the publication is Journal of Medicinal Chemistry (1992), 35(3), 457-65, database is CAplus and MEDLINE.

A broad structure-activity program was undertaken in search of effective surrogates for the key benzothiazole side chain of the potent aldose reductase inhibitor, zopolrestat. A structure-driven approach was pursued, which spanned exploration of three areas: (1) 5/6 fused heterocycles, such as benzoxazole, benzothiophene, benzofuran, and imidazopyridine; (2) 5-membered heterocycles, including oxadiazole, oxazole, thiazole, and thiadiazole, with pendant aryl groups, and (3) thioanilide as a formal equivalent of benzothiazole. Several benzoxazole- and 1,2,4-oxadiazole-derived analogs were found to be potent inhibitors of aldose reductase from human placenta and were orally active in preventing sorbitol accumulation in rat sciatic nerve, in an acute test of diabetic complications. Phthalazineacetic acid I was the best of the benzoxazole series ([C₅₀ = 3.2 × 10^-9M); it suppressed accumulation of sorbitol in rat sciatic nerve by 78% at an oral dose of 10 mg/kg. Oxadiazolyl derivative II with IC₅₀ < 1.0 × 10^-8M, caused a 69% reduction in sorbitol accumulation in rat sciatic nerve at an oral dose of 25 mg/kg. The thioanilide side chain features in III proved to be an effective surrogate for benzothiazole. III was highly potent in vitro (IC₅₀ = 5.2 × 10^-8M) but did not show oral activity when tested at 100 mg/kg. Addnl. structure-activity relationships encompassing a variety of heterocyclic side chains are discussed.

Journal of Medicinal Chemistry published new progress about 4760-35-4. 4760-35-4 belongs to imidazoles-derivatives, auxiliary class Chloride,Benzimidazole, name is 2-(Chloromethyl)-1-methyl-1H-benzo[d]imidazole, and the molecular formula is C9H9ClN2, Computed Properties of 4760-35-4.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem