Month: October 2022

In 2014,Ma, Hong-Ju; Zhang, Jian-Hua; Xia, Xiang-Dong; Xu, Meng-Han; Ning, Jun; Li, Jian-Hong published 《Design, synthesis and herbicidal activities of novel 4-(1H-pyrazol-1-yl)-6-(alkynyloxy)-pyrimidine derivatives as potential pigment biosynthesis inhibitors》.Pest Management Science published the findings.Synthetic Route of C4H3F3N2 The information in the text is summarized as follows:

BACKGROUND With the objective of finding novel valuable herbicidal candidates, a series of novel 4-(1H-pyrazol-1-yl)-6-(alkynyloxy)-pyrimidine derivatives were synthesized and their herbicide activities were evaluated in vivo. RESULTS The results showed that many target compounds expressed bleaching activities. Among these, compound 5 h showed the best bleaching activity to gramineous weeds, being able to produce the highest inhibition of chlorophyll level in seedlings of Pennisetum alopecuroides L. (IC50 = 3.48 mg L-1). Moreover, compound 5 h expressed good selective toxicity between gramineous P. alopecuroides L. and broadleaf plant Brassica campestris L. CONCLUSIONS The present work demonstrates that pyrimidine derivatives containing pyrazole can be used as potential lead compounds for developing novel pigment biosynthesis inhibitors. © 2013 Society of Chem. Industry. In the experimental materials used by the author, we found 3-(Trifluoromethyl)-1H-pyrazole(cas: 20154-03-4Synthetic Route of C4H3F3N2)

3-(Trifluoromethyl)-1H-pyrazole(cas: 20154-03-4) belongs to pyrazoles. The application of pyrazole derivatives in the development of anticancer agents has been thoroughly investigated and verified. Moreover, the medicinal features of a number of natural products incorporating pyrazole moiety such as pyrazofurin, pyrazofurin B, pyrazole-3(5)-carboxylic acid and 4-methylpyrazole-3(5)-carboxylic acid have been reported.Synthetic Route of C4H3F3N2

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

In 2016,Ahmed, Basil M.; Calco, Brice; Mezei, Gellert published 《Tuning the structure and solubility of nanojars by peripheral ligand substitution, leading to unprecedented liquid-liquid extraction of the carbonate ion from water into aliphatic solvents》.Dalton Transactions published the findings.Quality Control of 3-(Trifluoromethyl)-1H-pyrazole The information in the text is summarized as follows:

Nanojars, a novel class of neutral anion-incarcerating agents [CuII(OH)(pz)]n (Cun; n = 27-31, pz = pyrazolate anion), efficiently sequester various oxoanions with large hydration energies from H2O. The authors explore whether substituents on the pyrazole ligand interfere with nanojar formation, and whether appropriate substituents could be employed to tune the solubility of nanojars in solvents of interest, such as long-chain aliphatic hydrocarbons (solvent of choice for large-scale liquid-liquid extraction processes) and H2O. To this end, the authors conducted a comprehensive study using 40 different pyrazole ligands, with one, two or three substituents in their 3-, 4- and 5-positions. The corresponding nanojars were characterized by single-crystal x-ray diffraction and/or electrospray-ionization mass spectrometry (ESI-MS). Cun-nanojars with various substituents in the pyrazole 4-position, including long chains, Ph and CF3 groups, can be obtained. Straight chains are also tolerated at the pyrazole 3-position, and favor the Cu30-nanojar. Homoleptic nanojars, however, could not be obtained with Ph or CF3 groups. Nevertheless, if used in mixture with the parent nonsubstituted pyrazole, sterically hindered pyrazoles do form heteroleptic nanojars. With 3,5-disubstituted pyrazoles, only heteroleptic nanojars are accessible. The crystal structure of novel nanojars (Bu4N)2[CO3⊂{Cu30(OH)30(3,5-Me2pz)y(pz)30-y}] (y = 14 and 15) is presented. In contrast to the parent nanojar, which is insoluble in aliphatic solvents and H2O, nanojars with alkyl substituents are soluble in saturated hydrocarbon solvents, whereas nanojars based on novel pyrazoles, functionalized with oligoether chains, are readily soluble in H2O. Liquid-liquid extraction of carbonate from H2O under basic pH is presented for the first time. In the experiment, the researchers used many compounds, for example, 3-(Trifluoromethyl)-1H-pyrazole(cas: 20154-03-4Quality Control of 3-(Trifluoromethyl)-1H-pyrazole)

3-(Trifluoromethyl)-1H-pyrazole(cas: 20154-03-4) belongs to pyrazoles. The application of pyrazole derivatives in the development of anticancer agents has been thoroughly investigated and verified. Moreover, the medicinal features of a number of natural products incorporating pyrazole moiety such as pyrazofurin, pyrazofurin B, pyrazole-3(5)-carboxylic acid and 4-methylpyrazole-3(5)-carboxylic acid have been reported.Quality Control of 3-(Trifluoromethyl)-1H-pyrazole

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

Recommanded Product: 20154-03-4In 2015 ,《Design, synthesis and herbicidal evaluation of novel 4-(1H-pyrazol-1-yl)pyrimidine derivatives》 appeared in Pest Management Science. The author of the article were Ma, Hong-Ju; Zhang, Jian-Hua; Xia, Xiang-Dong; Kang, Jing; Li, Jian-Hong. The article conveys some information:

A series of novel pyrazolylpyrimidine derivatives I (R1 = H, CH3; R2 = OCH2CH3, SCH3, SO2CH3, N(CH3)2, etc.; R3 = H, CH3; R4 = CF3; X = H, Cl) were designed and synthesized. The herbicidal activities of 30 pyrazolylpyrimidine derivatives were assessed. Nine compounds caused good herbicidal activity for Pennisetum alopecuroides L. Among them, I (R1 = H; R2 = NHCH2CH3; R3 = CH3; R4 = CF3; X = H) exhibited the strongest inhibitory activity against the root growth of P. alopecuroides, with an IC50 of 1.90 mg L-1. Compound I (R1 = CH3; R2 = prop-2-yn-1-yloxy; R3 = CH3; R4 = CF3; X = H) produced the highest inhibition of chlorophyll level in seedlings of P. alopecuroides (IC50 = 3.14 mg L-1). The structure-activity relationship indicated that the alkynyloxy group at the 6-position on the pyrimidine ring played a very important role for bleaching activities. When the alkynyloxy group was replaced by alkoxy, amino, alkylthio and alkylsulfonyl groups, the bleaching activities of the compounds were diminished. However, the compounds substituted by an amino at the 6-position of the pyrimidine ring exhibited excellent inhibition activities against weed root growth. In addition to this study using 3-(Trifluoromethyl)-1H-pyrazole, there are many other studies that have used 3-(Trifluoromethyl)-1H-pyrazole(cas: 20154-03-4Recommanded Product: 20154-03-4) was used in this study.

3-(Trifluoromethyl)-1H-pyrazole(cas: 20154-03-4) belongs to pyrazoles. Pyrazole derivatives have been reported to exhibit a wide range of applications in medicinal chemistry and pharmacology. A large number of drugs incorporating pyrazole structure have been utilized as partial agonists for nicotinic acid receptors, antidepressants, antimicrobial agents, antiviral agents, and antifungal agents solely or along with the combination of other structural motifs.Recommanded Product: 20154-03-4

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

Safety of 3-(Trifluoromethyl)-1H-pyrazoleIn 2010 ,《First Application of an Efficient and Versatile Ligand for Copper-Catalyzed Cross-Coupling Reactions of Vinyl Halides with N-Heterocycles and Phenols》 appeared in Organic Letters. The author of the article were Kabir, M. Shahjahan; Lorenz, Michael; Namjoshi, Ojas A.; Cook, James M.. The article conveys some information:

2-Pyridin-2-yl-1H-benzoimidazole (I) is presented as a new, efficient, and versatile bidentate N-donor ligand suitable for the copper-catalyzed formation of vinyl C-N and C-O bonds. This inexpensive and easily prepared ligand facilitates copper-catalyzed cross-coupling reactions of alkenyl bromides and iodides with N-heterocycles and phenols to afford the desired cross-coupled products in good to excellent yields with full retention of stereochem. This method is particularly noteworthy given its efficiency, i.e., mild reaction conditions, low catalyst loading, simplicity, versatility, and exceptional level of functional group tolerance. The results came from multiple reactions, including the reaction of 3-(Trifluoromethyl)-1H-pyrazole(cas: 20154-03-4Safety of 3-(Trifluoromethyl)-1H-pyrazole)

3-(Trifluoromethyl)-1H-pyrazole(cas: 20154-03-4) belongs to pyrazoles. Pyrazole derivatives have been reported to exhibit a wide range of applications in medicinal chemistry and pharmacology. A large number of drugs incorporating pyrazole structure have been utilized as partial agonists for nicotinic acid receptors, antidepressants, antimicrobial agents, antiviral agents, and antifungal agents solely or along with the combination of other structural motifs.Safety of 3-(Trifluoromethyl)-1H-pyrazole

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

Product Details of 930-36-9On November 30, 2022 ,《Machine learning-assisted non-target analysis of a highly complex mixture of possible toxic unsymmetrical dimethylhydrazine transformation products with chromatography-mass spectrometry》 appeared in Chemosphere. The author of the article were Sholokhova, Anastasia Yu.; Grinevich, Oksana I.; Matyushin, Dmitriy D.; Buryak, Aleksey K.. The article conveys some information:

Unsym. dimethylhydrazine (UDMH) is a toxic and environmentally hostile compound that was massively introduced to the environment during previous decades due to its use in the space and rocket industry. The compound forms multiple transformation products, and many of them are as dangerous as UDMH or even more dangerous. The danger includes, but is not limited to, acute toxicity, chronic health hazards, carcinogenicity, and environmental damage. UDMH transformation products are poorly investigated. In this work, the mixture formed by long storage of the waste that contained UDMH was studied. Even a preliminary screening of such a mixture is a complex task. It consists of dozens of compounds, and most of them are missing in chem. and spectral databases. The complete preparative separation of such a mixture is very laborious. We applied several methods of gas chromatog.-mass spectrometry and liquid chromatog.-mass spectrometry, and several machine learning and chemoinformatics methods to make a preliminary but informative screening of the mixture Machine learning allowed predicting retention indexes and mass spectra of candidate structures. The combination of various ion sources and a comparison of the observed with the predicted spectra and retention was used to propose confident structures for 24 compounds It was demonstrated that neither high-resolution mass spectrometry nor mass spectral library matching is enough to elucidate the structures of unknown UDMH transformation products. At the same time, the use of machine learning and a combination of methods significantly improves the identification power. Finally, machine learning was applied to estimate the acute toxicity of the discovered compounds It was shown that many of them are comparable to or even more toxic than UDMH itself. Such an extremely wide and still underestimated variety of easily formed derivatives of UDMH can lead to a significant underestimation of the potential hazard of this compound The experimental part of the paper was very detailed, including the reaction process of 1-Methylpyrazole(cas: 930-36-9Product Details of 930-36-9)

1-Methylpyrazole(cas: 930-36-9) belongs to pyrazoles. Pyrazoles and their related multiring analogs are common elements of a wide variety of bioactive compounds. These ring structures are rare in nature. A consequence of this is that they have previously been thought to be poor moieties to include in potential new drugs. Product Details of 930-36-9

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

Molander, Gary A.; Argintaru, O. Andreea; Aron, Ioana; Dreher, Spencer D. published their research in Organic Letters on December 17 ,2010. The article was titled 《Nickel-Catalyzed Cross-Coupling of Potassium Aryl- and Heteroaryltrifluoroborates with Unactivated Alkyl Halides》.Related Products of 1258323-45-3 The article contains the following contents:

A method for the cross-coupling of alkyl electrophiles with various potassium aryl- and heteroaryltrifluoroborates has been developed. Nearly stoichiometric amounts of organoboron species could be employed to cross-couple a large variety of challenging heteroaryl nucleophiles. Several functional groups were tolerated on both the electrophilic and the nucleophilic partners. Chemoselective reactivity of C(sp3)-Br bonds in the presence of C(sp2)-Br bonds was achieved. In the experiment, the researchers used many compounds, for example, Potassium trifluoro(1-methyl-1H-pyrazol-5-yl)borate(cas: 1258323-45-3Related Products of 1258323-45-3)

Potassium trifluoro(1-methyl-1H-pyrazol-5-yl)borate(cas: 1258323-45-3) belongs to pyrazoles. Pyrazoles and their related multiring analogs are common elements of a wide variety of bioactive compounds. These ring structures are rare in nature. A consequence of this is that they have previously been thought to be poor moieties to include in potential new drugs. Related Products of 1258323-45-3

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

The author of 《Infrared spectra of pyrazoles. I. Monoalkyl-substituted pyrazoles》 were Zerbi, Giuseppe; Alberti, Carlo. And the article was published in Spectrochimica Acta in 1962. Recommanded Product: 52096-24-9 The author mentioned the following in the article:

The compounds studied were pyrazole, 3-alkyl-, 4-alkyl-, and N-alkylpyrazole, where the substituents were Me, Et, Pr, Bu, and amyl. The spectral region was 2-15 μ. Observed bands can be used to recognize the pyrazole structure and the position of the substituent. Most of the observed bands were assigned. In addition to this study using 1-Butyl-1H-pyrazole, there are many other studies that have used 1-Butyl-1H-pyrazole(cas: 52096-24-9Recommanded Product: 52096-24-9) was used in this study.

1-Butyl-1H-pyrazole(cas: 52096-24-9) belongs to pyrazoles. Pyrazoles and their related multiring analogs are common elements of a wide variety of bioactive compounds. These ring structures are rare in nature. A consequence of this is that they have previously been thought to be poor moieties to include in potential new drugs. Recommanded Product: 52096-24-9

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

Computed Properties of C5H6N2O2In 2004 ,《Synthesis and luminescence properties of lanthanide(III) chelates with polyacid derivatives of thienyl-substituted terpyridine analogues》 was published in Journal of Luminescence. The article was written by Yuan, Jingli; Tan, Mingqian; Wang, Guilan. The article contains the following contents:

Two new polyacid derivative ligands of thienyl-substituted terpyridine analogs, N,N,N1,N1-[4′-(2”’-thienyl)-2,2′:6′,2”-terpyridine-6,6”-diyl]bis(methylenenitrilo) tetrakis(acetic acid) (TTTA) and N,N,N1,N1-[2,6-bis(3′-aminomethyl-1′-pyrazolyl)-4-(2”-thienyl)pyridine]tetrakis(acetic acid) (BTTA), were synthesized, and the luminescence properties of their Eu3+ and Tb3+ chelates were studied. The Eu3+chelates of the two ligands are strongly luminescent having luminescence quantum yields of 0.150 (TTTA-Eu3+) and 0.114 (BTTA-Eu3+), and lifetimes of 1.284 ms (TTTA-Eu3+) and 1.352 ms (BTTA-Eu3+), whereas their Tb3+ chelates are weakly luminescent. The TTTA-Eu3+ chelate was used for streptavidin (SA) labeling, and the labeled SA was used for time-resolved fluoroimmunoassay of insulin in human sera. The method gives the detection limits of 33 pg ml-1. In the part of experimental materials, we found many familiar compounds, such as Methyl 1H-pyrazole-3-carboxylate(cas: 15366-34-4Computed Properties of C5H6N2O2)

Methyl 1H-pyrazole-3-carboxylate(cas: 15366-34-4) belongs to pyrazoles. Pyrazole derivatives have been reported to exhibit a wide range of applications in medicinal chemistry and pharmacology. A large number of drugs incorporating pyrazole structure have been utilized as partial agonists for nicotinic acid receptors, antidepressants, antimicrobial agents, antiviral agents, and antifungal agents solely or along with the combination of other structural motifs.Computed Properties of C5H6N2O2

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

《Correction to “”Modular, Step-Efficient Palladium-Catalyzed Cross-Coupling Strategy To Access C6-Heteroaryl 2-Aminopurine Ribonucleosides”” [Erratum to document cited in CA167:176274]》 was written by Buchanan, Helena S.; Pauff, Steven M.; Kosmidis, Tilemachos D.; Taladriz-Sender, Andrea; Rutherford, Olivia I.; Hatit, Marine Z. C.; Fenner, Sabine; Watson, Allan J. B.; Burley, Glenn A.. Related Products of 847818-74-0This research focused ontriazole isoxazole isonitrile nucleoside preparation cycloaddition erratum; aminopurine nucleoside chloroguanosine Suzuki Miyaura chloroguanosine heteroarylaminopurine Sonogashira coupling; palladium catalyzed coupling heteroaryl aminopurine nucleoside cycloaddition isonitrile isoxazole; erratum. The article conveys some information:

The following statement was inadvertently omitted from the Acknowledgments section of the manuscript: “”This work was supported by an EPSRC-GSK industrial CASE studentship for H.S.B. In the experiment, the researchers used many compounds, for example, 1-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole(cas: 847818-74-0Related Products of 847818-74-0)

1-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole(cas: 847818-74-0) belongs to pyrazoles. Pyrazoles are commonly used scaffold molecules in drug discovery projects. The use of pyrazole derivatives is based on their analgesic, monoamine oxidase inhibitory, anti-inflammatory, antipyretic, neuroleptic, anticonvulsant, antiarrhythmic, sedative, muscle relaxant, antidiabetic and antibacterial activities. Related Products of 847818-74-0

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

Formula: C5H6N2O2In 1976 ,《Modified nucleosides. V. Synthesis of pyrazole nucleosides》 appeared in Zhurnal Obshchei Khimii. The author of the article were Akhrem, A. A.; Garbuz, N. I.; Kvasyuk, E. I.; Mikhailopulo, I. A.. The article conveys some information:

Pyrazole nucleosides I, II (R = Ac, R1 = OEt) were obtained in 52 and 26% yields by treatment of Et acetoxymethylpyrazolecarboxylate with α-D-glucopyranose pentaacetate. Subsequent aminolysis yielded 90% I, II (R = H, R1 = NH2). Analogously obtained were 71 and 11% III, IV (R = Bz, R1 = Ac, R2 = OEt) which were treated with NH3 to give 90% III, IV (R = R1 = H, R2 = NH2). Similar results were obtained by glucosylation of Me pyrazolecarboxylate and by ribosylation of Et 4-acetoxymethyl-3-pyrazolecarboxylate. The experimental part of the paper was very detailed, including the reaction process of Methyl 1H-pyrazole-3-carboxylate(cas: 15366-34-4Formula: C5H6N2O2)

Methyl 1H-pyrazole-3-carboxylate(cas: 15366-34-4) belongs to pyrazoles. Pyrazole derivatives have been reported to exhibit a wide range of applications in medicinal chemistry and pharmacology. A large number of drugs incorporating pyrazole structure have been utilized as partial agonists for nicotinic acid receptors, antidepressants, antimicrobial agents, antiviral agents, and antifungal agents solely or along with the combination of other structural motifs.Formula: C5H6N2O2

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