Tag: M.W=100-150

Lyalin, Boris V.; Sigacheva, Vera L.; Kokorekin, Vladimir A.; Petrosyan, Vladimir A. published the artcile< A new synthesis of azopyrazoles by oxidation of C-aminopyrazoles on a NiO(OH) electrode>, Application of C7H11N3, the main research area is amino pyrazole electrochem oxidation; azopyrazole diastereoselective preparation.

Oxidation of C-amino-N-alkylpyrazoles on a NiO(OH) electrode in an aqueous alk. medium afforded the corresponding azopyrazoles. The success in implementation of these processes was due to the structure of C-aminopyrazoles.

Mendeleev Communications published new progress about Azo compounds Role: SPN (Synthetic Preparation), PREP (Preparation). 118430-74-3 belongs to class pyrazoles-derivatives, and the molecular formula is C7H11N3, Application of C7H11N3.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Chen, Deheng; Lu, Tian; Yan, Ziqin; Lu, Wenchao; Zhou, Feilong; Lyu, Xilin; Xu, Biling; Jiang, Hualiang; Chen, Kaixian; Luo, Cheng; Zhao, Yujun published the artcile< Discovery, structural insight, and bioactivities of BY27 as a selective inhibitor of the second bromodomains of BET proteins>, SDS of cas: 118430-74-3, the main research area is benzodiazepine BET bromodomain BD2 protein inhibitor preparation cancer; BD2; BET protein; Bromodomain; Crystal structure; Selective.

Recently, selective inhibition of BET BD2 is emerging as a promising strategy for drug discovery. Despite significant progress in this area, systematic studies of selective BET BD2 inhibitors are still few. In this study, we report the discovery of a potent and selective BET BD2 inhibitor BY27 (47). Our high resolution co-crystal structures of 47/BRD2 BD1 and BD2 showed that the triazole group of 47, water mols., H433 and N429 in BRD2 BD2 established a water-bridged H-bonding network, which is responsible for the observed selectivities. DNA microarray anal. of HepG2 cells treated with 47 or OTX015 demonstrated the transcriptome impact differences between a BET BD2 selective inhibitor and a pan BET inhibitor. In a MV4-11 mouse xenograft model, 47 caused 67% of tumor growth inhibition and was less toxic than a pan BET inhibitor 1 at high doses. We conclude that the improved safety profile of selective BET BD2 inhibitors warrant future studies in BET associated diseases.

European Journal of Medicinal Chemistry published new progress about Antitumor agents. 118430-74-3 belongs to class pyrazoles-derivatives, and the molecular formula is C7H11N3, SDS of cas: 118430-74-3.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Ding, Yun; Chai, Jing; Centrella, Paolo A.; Gondo, Chenaimwoyo; De Lorey, Jennifer L.; Clark, Matthew A. published the artcile< Development and Synthesis of DNA-Encoded Benzimidazole Library>, Computed Properties of 118430-74-3, the main research area is preparation DNA conjugated benzimidazole library NK3 receptor antagonist; DNA tagged fluoronitrobenzamide amine aldehyde; DNA-encoded library technology; benzimidazole.

Encoded library technol. (ELT) is an effective approach to the discovery of novel small-mol. ligands for biol. targets. A key factor for the success of the technol. is the chem. diversity of the libraries. Here we report the development of DNA-conjugated benzimidazoles. Using 4-fluoro-3-nitrobenzoic acid as a key synthon, we synthesized a 320 million-member DNA-encoded benzimidazole library using Fmoc-protected amino acids, amines and aldehydes as diversity elements. Affinity selection of the library led to the discovery of a novel, potent and specific antagonist of the NK3 receptor.

ACS Combinatorial Science published new progress about Chemical library. 118430-74-3 belongs to class pyrazoles-derivatives, and the molecular formula is C7H11N3, Computed Properties of 118430-74-3.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Jiang, Bo; Fan, Wei; Sun, Mu-Yan; Ye, Qin; Wang, Shu-Liang; Tu, Shu-Jiang; Li, Guigen published the artcile< Domino Reaction of Arylglyoxals with Pyrazol-5-amines: Selective Access to Pyrazolo-Fused 1,7-Naphthyridines, 1,3-Diazocanes, and Pyrroles>, HPLC of Formula: 118430-74-3, the main research area is domino heterocyclization arylglyoxal pyrazolamine pyrazolo naphthyridine diazocane pyrrole.

New multicomponent domino reactions of arylglyoxals with pyrazol-5-amines have been established, providing selective access to unprecedented pyrazolo-fused 1,7-naphthyridines, 1,3-diazocanes, and pyrroles (up to 52 examples). The unreported dipyrazolo-fused 1,7-naphthyridines were regioselectively synthesized through a special double [3 + 2 + 1] heteroannulation accompanied by direct C-C formation between two electrophilic sites of arylglyoxals [e.g., PhCOCH(OH)2 + 1,3-dimethyl-5-pyrazolamine in presence of TsOH → I (70%)]. The unusual [3 + 3 + 1 + 1] cyclization resulted in 20 examples of novel dipyrazolo-fused 1,3-diazocanes [e.g., PhCOCH(OH)2 + 1-methyl-3-phenyl-5-pyrazolamine in presence of TsOH → II (71%)], whereas pyrrolo[2,3-c]pyrazoles were obtained in good yields by varying arylglyoxals and pyrazol-5-amines in the ratio 1:2 [e.g., PhCOCH(OH)2 + 1-phenyl-3-methyl-5-pyrazolamine in presence of TsOH → III (78%)]. Mechanisms of formation of these three new types of heterocycles are also proposed.

Journal of Organic Chemistry published new progress about Atom economy. 118430-74-3 belongs to class pyrazoles-derivatives, and the molecular formula is C7H11N3, HPLC of Formula: 118430-74-3.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Juanes, Olga; De Mendoza, Javier; Rodriguez-Ubis, Juan Carlos published the artcile< Synthesis of macrobicyclic ligands containing pyrazole subunits: the N,N'-bipyrazolyl cryptand>, Category: pyrazoles-derivatives, the main research area is bromomethylbipyrazole cyclocondensation ammonia diazatetraoxacyclooctadecane; pyrazole bromomethyl cyclocondensation ammonia diazatetraoxacyclooctadecane; amination bromomethylpyrazole; cryptand bipyrazolyl; methanamine pyrazolyl.

The cryptands I and II were prepared in 19 and 56% yield, resp., by reaction of 3,3′-bis(bromomethyl)-1,1′-bipyrazole with anhydrous NH3 and 4,13-diaza-1,7,10,16-tetraoxacyclooctadecane, resp., in dry MeCN at 100°. The tripodal pyrazolyl ligands III (R = H, Me, CH2Ph) were prepared analogously in 35, 41, and 39% yield, resp., by reaction of the appropriate pyrazoles IV with anhydrous NH3.

Journal of the Chemical Society, Chemical Communications published new progress about Amination. 17827-61-1 belongs to class pyrazoles-derivatives, and the molecular formula is C6H8N2O2, Category: pyrazoles-derivatives.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Fan, Wei; Ye, Qin; Xu, Hai-Wei; Jiang, Bo; Wang, Shu-Liang; Tu, Shu-Jiang published the artcile< Novel Double [3 + 2 + 1] Heteroannulation for Forming Unprecedented Dipyrazolo-Fused 2,6-Naphthyridines>, Quality Control of 118430-74-3, the main research area is double heterocyclization multicomponent domino reaction; dipyrazolo fused naphthyridine preparation.

A novel four-component strategy for the efficient synthesis of unprecedented dipyrazolo-fused 2,6-naphthyridines, e.g. I, through a double [3 + 2+1] heteroannulation has been described. The bond-forming efficiency, accessibility, and generality of this synthesis make it highly valuable to assemble tetra-heterocyclic scaffolds.

Organic Letters published new progress about Heterocyclization. 118430-74-3 belongs to class pyrazoles-derivatives, and the molecular formula is C7H11N3, Quality Control of 118430-74-3.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Vasil’eva, V. F.; Yashunskii, V. G. published the artcile< Sydnones and sydnonimines. XIII. Reaction of 3-methyl- and 3-ethylsydnones with methyl acrylate>, HPLC of Formula: 17827-61-1, the main research area is .

Treatment of N-methylglycine with NaNO2 in aqueous HCl at 0°, followed by keeping the crude N-nitroso derivative with Ac2O 10 days at room temperature, gave 56.2% 3-methylsydnone (I), b0.7 162-5°. Similarly was prepared N-nitroso-N-ethylglycine, m. 85-6°, which with Ac2O gave 45.5% 3-ethylsydnone (II), b0.5 153-6°. Heating I with CH2:CHCO2Me 36 hrs. at 125-50° gave 56.5% Me 1-methyl-δ2-pyrazoline-3-carboxylate (III), b7 103-4°, d20 1.1162, n20D 1.5093, λ 306 mμ, and 24% crude Me x-carbomethoxy-1-methylpyrazoline-propionate (IV) (positions of attached groups not certain), b0.6 138-41°. The former in 2 days in MeOH-NH8 gave 1-methyl-δ2-pyrazolinecarboxamide, m. 116-18°, λ 296 mμ, while the latter ester gave the corresponding diamide, decomposed 241-2°. III and Pb(OAc)4 in AcOH (exothermic) gave 65% Me 1-methyl-pyrazole-3-carboxylate, b1 108-10°, which with MeOH-NH3 gave the corresponding amide, m. 139-40.5°, λ 220 mμ. 1-Methylpyrazole-4-carboxylic acid refluxed with MeOH-H2SO4 in C5H6 gave the Me ester, m. 63-4.5°, which with MeOH-NH3 1 day in a sealed tube gave the amide, m. 181.5-83°. II and CH2:CHCO2Me in 34 hrs. at 125° gave 51% Me 1-ethyl-δ2-pyrazoline-3-carboxylate (V), b7 110-12° b0.8 90° 1.0860, 1.5065, and some 25% crude 1-ethyl analog of IV, b0.5 135-42°. The former in MeOH-NH3 gave the amide, m. 92-4° while the latter ester similarly gave the diamide, decomposed 251-2°. V and Pb(OAc)4, as above, gave 62.5% Me 1-ethylpyrazole-3-carboxylate, b6 115-16°, which gave the amide, m. 100-1°. Infrared and ultraviolet spectra of the esters are reported.

Zhurnal Obshchei Khimii published new progress about IR spectra. 17827-61-1 belongs to class pyrazoles-derivatives, and the molecular formula is C6H8N2O2, HPLC of Formula: 17827-61-1.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Jiang, Bo; Ye, Qin; Fan, Wei; Wang, Shu-Liang; Tu, Shu-Jiang; Li, Guigen published the artcile< Four-component strategy for selective synthesis of azepino[5,4,3-cd]indoles and pyrazolo[3,4-b]pyridines>, Electric Literature of 118430-74-3, the main research area is pyrazolamine arylglyoxal hydrate aniline multicomponent domino cyclocondensation; hydropyrazoloazepinoindole preparation; pyrazolopyridine preparation.

A novel four-component strategy for the selective synthesis of fused 1,5,9,10-tetrahydropyrazolo[4′,3′:6,7]azepino[5,4,3-cd]indoles and pyrazolo[3,4-b]pyridines by domino reactions of 1-substituted 5-pyrazolamines, arylglyoxal monohydrates, and anilines was established. The bond-forming efficiency, accessibility of starting materials and substrate scope provide invaluable access to tetra-, and bis-heterocyclic scaffolds.

Chemical Communications (Cambridge, United Kingdom) published new progress about Aromatic amines Role: RCT (Reactant), RACT (Reactant or Reagent). 118430-74-3 belongs to class pyrazoles-derivatives, and the molecular formula is C7H11N3, Electric Literature of 118430-74-3.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Schulte, James P. II; Tweedie, Scott R. published the artcile< Palladium-catalyzed couplings of heteroaryl amines with aryl halides using sodium phenolate as the stoichiometric base>, Category: pyrazoles-derivatives, the main research area is microwave mediated palladium catalyzed coupling heteroaryl amine aryl halide; pyrazole pyridine pyrazine isoxazole arylamino preparation.

Heteroaryl amines are efficiently coupled (in two hours) to aryl halides with catalytic Pd2(dba)3 and Xantphos to provide the corresponding biaryl amines under microwave and standard thermal conditions. E.g., 3-tert-butyl-1-methyl-1H-pyrazol-5-amine reacts with p-bromobenzonitrile in the presence of 1.25 mol% Pd2(dba)3, 3 mo% Xantphos ligand and 1,5 equivalent NaOPh/dioxane under microwave conditions to give 91% yield of biarylamine I. The use of organic-soluble Na phenolate (NaOPh) as the stoichiometric base promotes facile coupling of a variety of substrates in excellent yields.

Synlett published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent) (heteroaryl). 118430-74-3 belongs to class pyrazoles-derivatives, and the molecular formula is C7H11N3, Category: pyrazoles-derivatives.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Pyrazoles and pyrimidines have diverse biological and pharmacological activities. 37622-90-5, formula is C6H8N2O2, Name is Ethyl 4-pyrazolecarboxylate. There are a number of antimicrobial compounds containing pyrazole moiety as the core unit. Computed Properties of 37622-90-5.

Kumar Ghosh, Asim;Neogi, Sukanya;Das, Krishna Kanta;Hajra, Alakananda research published 《 Organocatalytic Oxidative C-H Amination of Aldehyde Hydrazones with Azoles at Ambient Temperature》, the research content is summarized as follows. An efficient, metal-free, and direct oxidative amination of aldehyde-derived hydrazones R¹CH=N-N(CH₂)₂X(CH₂)₂– (R¹ = Ph, 2-bromo-5-chlorophenyl, naphthalen-1-yl, 2-methylphenyl, etc.; X = O, CH₂) with azoles e.g., I has been developed using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as an organocatalyst under ambient temperature This protocol provides a wide range of aminated hydrazone derivatives II (R² = 3,5-dimethyl-1H-pyrazol-1-yl, 2H-indazol-2-yl, 4-phenyl-1H-1,2,3-triazol-1-yl, etc.) in a step and atom economical fashion. The reaction possibly follows a radical mechanism.

37622-90-5, Ethyl 4-pyrazolecarboxylate, also known as Ethyl pyrazole-4-carboxylate, is a useful research compound. Its molecular formula is C6H8N2O2 and its molecular weight is 140.14 g/mol. The purity is usually 95%.

Ethyl pyrazole-4-carboxylate is a low yield, transition metal salt that is used in the synthesis of pyrazoles. It can be synthesized by the reaction of sodium ethoxide with ethyl chloroformate and a Grignard reagent. Sodium ethoxide is added to a suspension of sodium chloride and dried ethyl chloroformate, followed by addition of magnesium turnings. The mixture is refluxed for one hour, cooled, and filtered to give crystals. Ethyl pyrazole-4-carboxylate is used in the preparation of ethyl esters from aliphatic alcohols by reacting with boron trichloride or phosphorus pentachloride. It participates in certain chemical reactions as a byproduct and can damage equipment during chemical reactions. The yield of this compound can be increased by using an excess amount of Grignard reagent or adding hexamethylenetetramine to the reaction mixture, Computed Properties of 37622-90-5

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics