pyrazoles-derivatives

Pyrazole and its derivatives are considered a pharmacologically important active scaffold that possesses almost all types of pharmacological activities. 269410-08-4, formula is C9H15BN2O2, Name is 4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole. Pyrazole is a weak base, with pKb 11.5 (pKa of the conjugated acid 2.49 at 25 °C).Pyrazole used as a ligand to prepare organometallic compounds. Safety of 4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole.

Wang, Haiyang;Guo, Chang research published 《 Enantioselective γ-Addition of Pyrazole and Imidazole Heterocycles to Allenoates Catalyzed by Chiral Phosphine》, the research content is summarized as follows. Chiral phosphines were found to catalyze the enantioselective asym. γ-addition of heteroaromatic compounds to allenoates in good yields with high enantiomeric ratios and regioselectivity in the presence of (S)-BINOL. Both pyrazole and imidazole could be employed in this process. The synthetic value of these γ-addition products was demonstrated by the preparation of biol. relevant mols. and structural scaffolds. Remarkably, the synthetic utility of this strategy was demonstrated through a two-step synthesis of a Janus kinase (JAK) inhibitor.

Safety of 4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole, 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole, also known as 4-Pyrazoleboronic acid pinacol ester , is a useful research compound. Its molecular formula is C9H15BN2O2 and its molecular weight is 194.04 g/mol. The purity is usually 95%.

4-Pyrazoleboronic acid pinacol ester is a useful reagent for Suzuki-Miyaura cross-couplings as well as Ruthenium-catalyzed asymmetric hydrogenation. 4-Pyrazoleboronic acid pinacol ester is also a useful reagent for preparing VEGF, Aurora, RHO (ROCK), Janus Kinase 2, c-MET, ALK, S-nitrsoflutathione reductase, CDC7, Acetyl-CoA carboxylase inhibitors.

4-Pyrazoleboronic acid pinacol ester is used in the preparation of Rho kinase (ROCK) inhibitors as wella s other biologically active compounds.

4-Pyrazoleboronic acid pinacol ester is an organic compound that is the product of a bifunctional coupling reaction between 4-pyrazolecarboxylic acid and pinacol. It has been shown to inhibit protein S6 kinase, which is involved in the regulation of cell growth and proliferation. This compound has also been shown to be effective against cancer cells, including those that are resistant to conventional chemotherapeutic drugs. 4-Pyrazoleboronic acid pinacol ester may also be used as a precursor for other compounds with pharmaceutical activity., 269410-08-4.

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

Pyrazoles can be selectively lithiated at different carbons and subsequently react with electrophiles depending on the substitution patterns. 761446-44-0, formula is C10H17BN2O2, Name is 1-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole. 1-Methyl-5-(trifluoromethyl)pyrazole underwent deprotonation and subsequent carboxylation mainly or exclusively at either the 4-position of the heterocycle or at the nitrogen-attached methyl group. Recommanded Product: 1-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole.

Wang, Haili;Chen, Yunzhong;Gu, Xiaofan;Xi, Jianbei;Ren, Ziwei;Wang, Shuting;Duan, Yanhong;Li, Hongyu;Zhu, Tong;Du, Yijie;Zhang, Xiongwen;Ma, Mingliang research published 《 Design, synthesis, and structure activity relationship (SAR) studies of novel imidazo[1,2-a]pyridine derivatives as Nek2 inhibitors》, the research content is summarized as follows. Herein, a series of imidazo[1,2-a]pyridines, e.g., I, Nek2 inhibitors were designed, synthesized and their biol. activities were investigated. Besides, structure activity relationship anal. of these compounds were performed in the MGC-803 cell. The screening results are promising, and tert-Bu 3-((4-(3-(5-carbamoyl-4-(1-(2-(trifluoromethyl)phenyl)ethoxy)thiophen-2-yl) imidazo[1,2-a] pyridine-7-yl)-1H-pyrazol-1-yl)methyl)azetidine-1-carboxylate showed good proliferation inhibitory activity with an IC₅₀ of 38 nM. The results would be helpful to design and develop more effective Nek2 inhibitors for the treatment of gastric cancer.

Recommanded Product: 1-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole, 1-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole is a useful research compound. Its molecular formula is C10H17BN2O2 and its molecular weight is 208.07 g/mol. The purity is usually 95%., 761446-44-0.

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

Pyrazole and its derivatives are considered a pharmacologically important active scaffold that possesses almost all types of pharmacological activities. 269410-08-4, formula is C9H15BN2O2, Name is 4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole. Pyrazole is a weak base, with pKb 11.5 (pKa of the conjugated acid 2.49 at 25 °C).Pyrazole used as a ligand to prepare organometallic compounds. COA of Formula: C9H15BN2O2.

Wang, Haili;Chen, Yunzhong;Gu, Xiaofan;Xi, Jianbei;Ren, Ziwei;Wang, Shuting;Duan, Yanhong;Li, Hongyu;Zhu, Tong;Du, Yijie;Zhang, Xiongwen;Ma, Mingliang research published 《 Design, synthesis, and structure activity relationship (SAR) studies of novel imidazo[1,2-a]pyridine derivatives as Nek2 inhibitors》, the research content is summarized as follows. Herein, a series of imidazo[1,2-a]pyridines, e.g., I, Nek2 inhibitors were designed, synthesized and their biol. activities were investigated. Besides, structure activity relationship anal. of these compounds were performed in the MGC-803 cell. The screening results are promising, and tert-Bu 3-((4-(3-(5-carbamoyl-4-(1-(2-(trifluoromethyl)phenyl)ethoxy)thiophen-2-yl) imidazo[1,2-a] pyridine-7-yl)-1H-pyrazol-1-yl)methyl)azetidine-1-carboxylate showed good proliferation inhibitory activity with an IC₅₀ of 38 nM. The results would be helpful to design and develop more effective Nek2 inhibitors for the treatment of gastric cancer.

269410-08-4, 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole, also known as 4-Pyrazoleboronic acid pinacol ester , is a useful research compound. Its molecular formula is C9H15BN2O2 and its molecular weight is 194.04 g/mol. The purity is usually 95%.

4-Pyrazoleboronic acid pinacol ester is a useful reagent for Suzuki-Miyaura cross-couplings as well as Ruthenium-catalyzed asymmetric hydrogenation. 4-Pyrazoleboronic acid pinacol ester is also a useful reagent for preparing VEGF, Aurora, RHO (ROCK), Janus Kinase 2, c-MET, ALK, S-nitrsoflutathione reductase, CDC7, Acetyl-CoA carboxylase inhibitors.

4-Pyrazoleboronic acid pinacol ester is used in the preparation of Rho kinase (ROCK) inhibitors as wella s other biologically active compounds.

4-Pyrazoleboronic acid pinacol ester is an organic compound that is the product of a bifunctional coupling reaction between 4-pyrazolecarboxylic acid and pinacol. It has been shown to inhibit protein S6 kinase, which is involved in the regulation of cell growth and proliferation. This compound has also been shown to be effective against cancer cells, including those that are resistant to conventional chemotherapeutic drugs. 4-Pyrazoleboronic acid pinacol ester may also be used as a precursor for other compounds with pharmaceutical activity., COA of Formula: C9H15BN2O2

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

Pyrazoles can be selectively lithiated at different carbons and subsequently react with electrophiles depending on the substitution patterns. 2075-46-9, formula is C3H3N3O2, Name is 4-Nitro-1H-pyrazole. 1-Methyl-5-(trifluoromethyl)pyrazole underwent deprotonation and subsequent carboxylation mainly or exclusively at either the 4-position of the heterocycle or at the nitrogen-attached methyl group. COA of Formula: C3H3N3O2.

Wang, Chen-Ru;Wang, Ze-Feng;Shi, Lu;Wang, Zhong-Chang;Zhu, Hai-Liang research published 《 Design, synthesis, and biological evaluation of pyrazole derivatives containing acetamide bond as potential BRAF^V600E inhibitors》, the research content is summarized as follows. With the increasingly acquired resistance, relapse and side effects of known marketed BRAF^V600E inhibitors, it’s significant to design the more effective and novel drugs. In this study, a series of novel pyrazole derivatives containing acetamide bond had been designed and synthesized on the basis of anal. of the endogenous ligands extracted from the known B-Raf co-crystals in the PDB database. Then, the compounds were evaluated for biol. activities as potential BRAF^V600E inhibitors. The bioassay results in vitro against three human tumor cell lines revealed that some of the compounds showed very impressed antiproliferative property. Among them, the compound I with IC₅₀ values of 0.10 ± 0.01 μM against BRAF^V600E and 0.96 ± 0.10 μM against A375 cell line, showed the most potent inhibitory effect, compared with the pos.-controlled agents vemurafenib (IC₅₀ = 0.04 ± 0.004 μM for BRAF^V600E, IC₅₀ = 1.05 ± 0.10 μM against A375). Further investigation confirmed that the compound I could induce A375 cell apoptosis, induce A375 cell death through changing mitochondrial membrane potential, and result in A375 cell arrest at the G1 phase of the cell cycle. Docking simulations results indicated that the compound 5r could bind tightly at the BRAF^V600E active site. Meanwhile, 3D-QSAR model suggested that these compounds may be potential anticancer inhibitors. Overall, the article provided some new mol. scaffolds for the further BRAF^V600E inhibitors.

2075-46-9, 4-Nitro-1H-pyrazole, also known as 4-Nitropyrazole, is a useful research compound. Its molecular formula is C3H3N3O2 and its molecular weight is 113.08 g/mol. The purity is usually 95%.

4-Nitropyrazole, is a building block for the synthesis of various pharmaceutical compounds, including inhibitors, and therapeutic agents. It can be used for the synthesis of highly selective, brain-penetrant aminopyrazole LRRK2 Inhibitor, as a potentially viable treatment for Parkinson’s disease., COA of Formula: C3H3N3O2

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

Pyrazoles can be selectively lithiated at different carbons and subsequently react with electrophiles depending on the substitution patterns. 2075-46-9, formula is C3H3N3O2, Name is 4-Nitro-1H-pyrazole. 1-Methyl-5-(trifluoromethyl)pyrazole underwent deprotonation and subsequent carboxylation mainly or exclusively at either the 4-position of the heterocycle or at the nitrogen-attached methyl group. HPLC of Formula: 2075-46-9.

Wang, Ban;Mccabe, Gavin E.;Parrish, Mitchell J.;Singh, Jujhar;Zeller, Matthias;Deng, Yongming research published 《 Organic Photoredox Catalyzed Direct Hydroamination of Ynamides with Azoles》, the research content is summarized as follows. Disclosed herein was a photoinduced selective hydroamination of ynamides with nitrogen heteroaromatic nucleophiles. By using an organocatalytic photoredox system, a direct method to construct a diverse of (Z)-α-aryl enamides I [R¹ = Ph, n-hexyl, 4-MeC₆H₄, etc.; R² = Me, t-Bu, Bn; R³ = Ms, Ts, Ns; Ar = pyrazol-1-yl, triazol-1-yl, (5-methyltetrazol-2-yl), etc.] from ynamides and pyrazoles, as well as triazoles, benzotriazoles, indazoles, and tetrazoles, was developed, thus providing a photocatalytically synthetic route to heterocyclic motifs common in medicinal agents. Based on the mechanistic studies, the hydroamination was postulated to operate via a mechanism in which the single-electron oxidation of ynamide and the intermediacy of an alkyne radical cation, was responsible for the observed reactivity.

2075-46-9, 4-Nitro-1H-pyrazole, also known as 4-Nitropyrazole, is a useful research compound. Its molecular formula is C3H3N3O2 and its molecular weight is 113.08 g/mol. The purity is usually 95%.

4-Nitropyrazole, is a building block for the synthesis of various pharmaceutical compounds, including inhibitors, and therapeutic agents. It can be used for the synthesis of highly selective, brain-penetrant aminopyrazole LRRK2 Inhibitor, as a potentially viable treatment for Parkinson’s disease., HPLC of Formula: 2075-46-9

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

Pyrazole is an organic compound with the formula C3H3N2H. It is a heterocycle characterized by a 5-membered ring of three carbon atoms and two adjacent nitrogen atoms, which are in ortho-substitution. 37622-90-5, formula is C6H8N2O2, Name is Ethyl 4-pyrazolecarboxylate. Pyrazoles are a class of compounds that have the ring C3N2 with adjacent nitrogen atoms.Notable drugs containing a pyrazole ring are celecoxib (celebrex) and the anabolic steroid stanozolol. Electric Literature of 37622-90-5.

Wan, Zhaohua;Wang, Dan;Yang, Zixuan;Zhang, Heng;Wang, Shengchun;Lei, Aiwen research published 《 Electrochemical oxidative C(sp³)-H azolation of lactams under mild conditions》, the research content is summarized as follows. An electrochem. oxidative direct C(sp³)-H azolation of lactams was reported under metal catalyst-free and external chem. oxidant-free conditions. This electrochem. C(sp³)-H/N-H coupling was characterized by its broad substrate scope of azoles and lactams under mild conditions at room temperature Mechanistic studies suggested that the reaction possibly involves a radical process. Moreover, the site selectivity was explained by DFT calculations More meaningfully, a gram-scale synthesis method of flow electrochem. was employed to show the scaled-up applicability of this transformation.

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, Electric Literature of 37622-90-5

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

Pyrazoles are synthesized by the reaction of α,β-unsaturated aldehydes with hydrazine and subsequent dehydrogenation. 2075-46-9, formula is C3H3N3O2, Name is 4-Nitro-1H-pyrazole. Substituted pyrazoles are prepared by condensation of 1,3-diketones with hydrazine (Knorr-type reactions). For example, acetylacetone and hydrazine gives 3,5-dimethylpyrazole. Formula: C3H3N3O2.

Wan, Zhaohua;Wang, Dan;Yang, Zixuan;Zhang, Heng;Wang, Shengchun;Lei, Aiwen research published 《 Electrochemical oxidative C(sp³)-H azolation of lactams under mild conditions》, the research content is summarized as follows. An electrochem. oxidative direct C(sp³)-H azolation of lactams was reported under metal catalyst-free and external chem. oxidant-free conditions. This electrochem. C(sp³)-H/N-H coupling was characterized by its broad substrate scope of azoles and lactams under mild conditions at room temperature Mechanistic studies suggested that the reaction possibly involves a radical process. Moreover, the site selectivity was explained by DFT calculations More meaningfully, a gram-scale synthesis method of flow electrochem. was employed to show the scaled-up applicability of this transformation.

2075-46-9, 4-Nitro-1H-pyrazole, also known as 4-Nitropyrazole, is a useful research compound. Its molecular formula is C3H3N3O2 and its molecular weight is 113.08 g/mol. The purity is usually 95%.

4-Nitropyrazole, is a building block for the synthesis of various pharmaceutical compounds, including inhibitors, and therapeutic agents. It can be used for the synthesis of highly selective, brain-penetrant aminopyrazole LRRK2 Inhibitor, as a potentially viable treatment for Parkinson’s disease., Formula: C3H3N3O2

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

Pyrazoles can be selectively lithiated at different carbons and subsequently react with electrophiles depending on the substitution patterns. 37622-90-5, formula is C6H8N2O2, Name is Ethyl 4-pyrazolecarboxylate. 1-Methyl-5-(trifluoromethyl)pyrazole underwent deprotonation and subsequent carboxylation mainly or exclusively at either the 4-position of the heterocycle or at the nitrogen-attached methyl group. Safety of Ethyl 4-pyrazolecarboxylate.

Wan, Ting;Capaldo, Luca;Laudadio, Gabriele;Nyuchev, Alexander V.;Rincon, Juan A.;Garcia-Losada, Pablo;Mateos, Carlos;Frederick, Michael O.;Nuno, Manuel;Noel, Timothy research published 《 Decatungstate-Mediated C(sp³)-H Heteroarylation via Radical-Polar Crossover in Batch and Flow》, the research content is summarized as follows. The unprecedented combination of decatungstate hydrogen atom transfer photocatalysis with the oxidative radical-polar crossover concept to access the direct net-oxidative C(sp3)-H heteroarylation were reported. The present methodol. demonstrates a high functional group tolerance e.g., 1-(tetrahydrofuran-2-yl)-1H-pyrazole and is scalable when using continuous-flow reactor technol. The developed protocol is also amenable to the late-stage functionalization of biol. relevant mols. such as stanozolol, (-)-ambroxide, podophyllotoxin, and dideoxyribose.

Safety of Ethyl 4-pyrazolecarboxylate, 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, 37622-90-5.

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

Pyrazole is an organic compound with the formula C3H3N2H. It is a heterocycle characterized by a 5-membered ring of three carbon atoms and two adjacent nitrogen atoms, which are in ortho-substitution. 269410-08-4, formula is C9H15BN2O2, Name is 4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole. Pyrazoles are a class of compounds that have the ring C3N2 with adjacent nitrogen atoms.Notable drugs containing a pyrazole ring are celecoxib (celebrex) and the anabolic steroid stanozolol. Electric Literature of 269410-08-4.

Wan, Ting;Capaldo, Luca;Laudadio, Gabriele;Nyuchev, Alexander V.;Rincon, Juan A.;Garcia-Losada, Pablo;Mateos, Carlos;Frederick, Michael O.;Nuno, Manuel;Noel, Timothy research published 《 Decatungstate-Mediated C(sp³)-H Heteroarylation via Radical-Polar Crossover in Batch and Flow》, the research content is summarized as follows. The unprecedented combination of decatungstate hydrogen atom transfer photocatalysis with the oxidative radical-polar crossover concept to access the direct net-oxidative C(sp3)-H heteroarylation were reported. The present methodol. demonstrates a high functional group tolerance e.g., 1-(tetrahydrofuran-2-yl)-1H-pyrazole and is scalable when using continuous-flow reactor technol. The developed protocol is also amenable to the late-stage functionalization of biol. relevant mols. such as stanozolol, (-)-ambroxide, podophyllotoxin, and dideoxyribose.

269410-08-4, 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole, also known as 4-Pyrazoleboronic acid pinacol ester , is a useful research compound. Its molecular formula is C9H15BN2O2 and its molecular weight is 194.04 g/mol. The purity is usually 95%.

4-Pyrazoleboronic acid pinacol ester is a useful reagent for Suzuki-Miyaura cross-couplings as well as Ruthenium-catalyzed asymmetric hydrogenation. 4-Pyrazoleboronic acid pinacol ester is also a useful reagent for preparing VEGF, Aurora, RHO (ROCK), Janus Kinase 2, c-MET, ALK, S-nitrsoflutathione reductase, CDC7, Acetyl-CoA carboxylase inhibitors.

4-Pyrazoleboronic acid pinacol ester is used in the preparation of Rho kinase (ROCK) inhibitors as wella s other biologically active compounds.

4-Pyrazoleboronic acid pinacol ester is an organic compound that is the product of a bifunctional coupling reaction between 4-pyrazolecarboxylic acid and pinacol. It has been shown to inhibit protein S6 kinase, which is involved in the regulation of cell growth and proliferation. This compound has also been shown to be effective against cancer cells, including those that are resistant to conventional chemotherapeutic drugs. 4-Pyrazoleboronic acid pinacol ester may also be used as a precursor for other compounds with pharmaceutical activity., Electric Literature of 269410-08-4

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

Pyrazoles can be selectively lithiated at different carbons and subsequently react with electrophiles depending on the substitution patterns. 37622-90-5, formula is C6H8N2O2, Name is Ethyl 4-pyrazolecarboxylate. 1-Methyl-5-(trifluoromethyl)pyrazole underwent deprotonation and subsequent carboxylation mainly or exclusively at either the 4-position of the heterocycle or at the nitrogen-attached methyl group. SDS of cas: 37622-90-5.

Vorobyeva, Evgeniya;Gerken, Viktoria C.;Mitchell, Sharon;Sabadell-Rendon, Albert;Hauert, Roland;Xi, Shibo;Borgna, Armando;Klose, Daniel;Collins, Sean M.;Midgley, Paul A.;Kepaptsoglou, Demie M.;Ramasse, Quentin M.;Ruiz-Ferrando, Andrea;Fako, Edvin;Ortuno, Manuel A.;Lopez, Nuria;Carreira, Erick M.;Perez-Ramirez, Javier research published 《 Activation of Copper Species on Carbon Nitride for Enhanced Activity in the Arylation of Amines》, the research content is summarized as follows. We report the promoting effect of graphitic carbon nitride in Cu-catalyzed N-arylation. The abundance of pyridinic coordination sites in this host permits the adsorption of copper iodide from the reaction medium. The key to achieving high activity is to confine active Cu species on the surface, which is accomplished by introducing atomically dispersed metal dopants to block diffusion into the bulk of the carrier. The alternative route of incorporating metal during the synthesis of graphitic carbon nitride is ineffective as Cu is thermodynamically more stable in inactive subsurface positions. A combination of X-ray absorption, X-ray photoelectron, and ESR spectroscopy, d. functional theory, and kinetic Monte Carlo simulations is employed to determine the location and associated geometry as well as the electronic structure of metal centers. N-Arylation activity correlates to the surface coverage by copper, which varies during the reaction due to an interplay between site formation via adsorption from the reaction medium and deactivation by diffusion into the bulk of the material, and is highest when an Fe dopant is used to hinder such movement through the lattice.

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, SDS of cas: 37622-90-5

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