Tag: 100-200

《Iridium-catalyzed asymmetric trans-selective hydrogenation of 1,3-disubstituted isoquinolines》 was written by Kim, Alexia N.; Ngamnithiporn, Aurapat; Bartberger, Michael D.; Stoltz, Brian M.. Reference of tert-Butyl carbamateThis research focused ontrans tetrahydroisoquinoline preparation enantioselective; isoquinoline hydrogenation iridium catalyst. The article conveys some information:

The development of the first asym. trans-selective hydrogenation of 1,3-disubstituted isoquinolines is reported. Utilizing [Ir(cod)Cl]2 and a com. available chiral Josiphos ligand, a variety of differentially substituted isoquinolines are hydrogenated to produce enantioenriched trans-tetrahydroisoquinolines in good yield with high levels of enantioselectivity. Directing group studies demonstrate that the hydroxymethyl functionality at the C1 position is critical for hydrogenation to favor the trans-diastereomer. Preliminary mechanistic studies reveal that non-coordinating chlorinated solvents and halide additives are crucial to enable trans-selectivity. In the part of experimental materials, we found many familiar compounds, such as tert-Butyl carbamate(cas: 4248-19-5Reference of tert-Butyl carbamate)

tert-Butyl carbamate(cas: 4248-19-5) belongs to anime. Reduction of nitro compounds, RNO2, by hydrogen or other reducing agents produces primary amines cleanly (i.e., without a mixture of products), but the method is mostly used for aromatic amines because of the limited availability of aliphatic nitro compounds. Reduction of nitriles and oximes (R2C=NOH) also yields primary amines.Reference of tert-Butyl carbamate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

《Designed asymmetric coordination helicates with bis-β-diketonate ligands》 was published in Dalton Transactions in 2019. These research results belong to Diego, Rosa; Darawsheh, Mohanad; Barrios, Leoni A.; Sadurni, Anna; Garcia, Jordi; Lloyd-Williams, Paul; Teat, Simon J.; Roubeau, Olivier; Aguila, David; Aromi, Guillem. SDS of cas: 1877-71-0 The article mentions the following:

A new bis-(β-diketone) ligand featuring built-up structural asymmetry yields non-sym. Fe(III) and Ga(III) dinuclear, triple-stranded helicates by design. Their structural properties have been studied, both in solid state and in solution, and compared with their corresponding sym. analogs. The robustness observed shows the potential of this synthetic strategy to develop non-sym. helicoidal motifs with specific functional groups. In the experiment, the researchers used 3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0SDS of cas: 1877-71-0)

3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0) belongs to esters. Esters are more polar than ethers but less polar than alcohols. SDS of cas: 1877-71-0 They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

《Design and development of 1,3,5-triazine-thiadiazole hybrids as potent adenosine A2A receptor (A2AR) antagonist for benefit in Parkinson’s disease》 was written by Masih, Anup; Singh, Saumya; Agnihotri, Amol Kumar; Giri, Sabeena; Shrivastava, Jitendra Kumar; Pandey, Nidhi; Bhat, Hans Raj; Singh, Udaya Pratap. Recommanded Product: Methyl 4-fluorobenzoateThis research focused ontriazine thiadiazole hybrid antiParkinson neuroprotectant A2AR antagonist Parkinsons disease; 1,3,5-triazine; Adenosine A(2)A receptor; Antagonist; Docking; Parkinson’s disease. The article conveys some information:

Various studies showed adenosine A2A receptors (A2ARs) antagonists have profound therapeutic efficacy in Parkinsons Disease (PD) by improving dopamine transmission, thus being active in reversing motor deficits and extrapyramidal symptoms related to the disease. Therefore, in the presents study, we have showed the development of novel 1,3,5-triazine-thiadiazole derivative as potent A2ARs antagonist. In the radioligand binding assay, these mols. showed excellent binding affinity with A2AR compared to A1R, with significant selectivity. Results suggest, compound 7e as most potent antagonist of A2AR among the tested series. In docking anal. with A2AR protein model, compound 7e found to be deeply buried into the cavity of receptor lined via making numerous interat. contacts with His264, Tyr271, His278, Glu169, Ala63, Val84, Ile274, Met270, Phe169. Collectively, our study demonstrated 1,3,5-triazine-thiadiazole hybrid as a highly effective scaffold for the design of new A2A antagonists.Methyl 4-fluorobenzoate(cas: 403-33-8Recommanded Product: Methyl 4-fluorobenzoate) was used in this study.

Methyl 4-fluorobenzoate(cas: 403-33-8) can be used in the synthesis of trisubstituted imidazole derivatives containing a 4-fluorophenyl group, a pyrimidine ring, and a CN- or CONH2-substituted benzyl moiety.Recommanded Product: Methyl 4-fluorobenzoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Category: esters-buliding-blocksIn 2019 ,《Slow magnetic relaxation in mononuclear gadolinium(III) and dysprosium(III) oxamate complexes》 appeared in Polyhedron. The author of the article were da Cunha, Tamyris T.; Barbosa, Vitor M. M.; Oliveira, Willian X. C.; Pinheiro, Carlos B.; Pedroso, Emerson F.; Nunes, Wallace C.; Pereira, Cynthia L. M.. The article conveys some information:

A series of lanthanide(III) oxamate complexes of formula Na[Eu(4-HOpa)4(H2O)]•2H2O (1), Na[Gd(4-HOpa)4(H2O)]•2H2O (2), Na[Dy(4-HOpa)4(H2O)]•2H2O (3), and Na[Ho(4-HOpa)4(H2O)]•2H2O (4) (4-HOpa = N-4-hydroxyphenyloxamate) were synthesized and characterized. The crystal structures of complexes 1-4, as well as the oxamate ligand in the Et ester acid form (Et[4-HOpa]), were elucidated by single crystal X-ray diffraction. 1-4 are isostructural, and they crystallize in the P21/n space group of the monoclinic system. The crystal structures of 1-4 consist of mononuclear lanthanide(III) complex anions, [Ln(4-HOpa)4(H2O)]- (Ln = Eu3+, Gd3+, Dy3+, and Ho3+), coordinated sodium countercations, and crystallization water mols., resulting in a 2D NaILnIII supramol. coordination network. The coordination sphere of Ln3+ ions consists of square-face capped square antiprism (SAPRS-9). Magnetic properties were investigated for 1-4 in the 2-300 K temperature range using polycrystalline samples. Complex 2 exhibits an unusual and rare slow-relaxation of the magnetization for Gd3+ ions under DC applied field of 1.0 kOe, behaving as a field-induced single-ion magnet as occurs for the Dy3+ complex 3. The Eu3+ complex 1 has a nonmagnetic ground state, while the Ho3+ compound 4 behave as a paramagnet, and do not exhibit relaxation of the magnetization with or without an applied field. In the part of experimental materials, we found many familiar compounds, such as Ethyl oxalyl monochloride(cas: 4755-77-5Category: esters-buliding-blocks)

Ethyl oxalyl monochloride(cas: 4755-77-5) belongs to acyl chlorides. Lacking the ability to form hydrogen bonds, acyl chlorides have lower boiling and melting points than similar carboxylic acids. For example, acetic acid boils at 118 °C, whereas acetyl chloride boils at 51 °C. Like most carbonyl compounds, infrared spectroscopy reveals a band near 1750 cm−1.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Quality Control of Diethyl 2-methylmalonateIn 2020 ,《Modulation of Bacterial Quorum Sensing by Strigolactones》 appeared in ACS Chemical Biology. The author of the article were Mozes, Chen; Meijler, Michael M.. The article conveys some information:

Strigolactones are plant hormones with multiple roles that act as signaling mols. in many processes in the rhizosphere. In recent years, addnl. roles of strigolactones in nature have emerged, and here we report that strigolactones are able to modulate bacterial quorum sensing (QS) in the human pathogen Vibrio cholerae. After reading the article, we found that the author used Diethyl 2-methylmalonate(cas: 609-08-5Quality Control of Diethyl 2-methylmalonate)

Diethyl 2-methylmalonate(cas: 609-08-5) belongs to aliphatic hydrocarbons. Aliphatic hydrocarbons belong to the most abundant fraction in crude oil. Aliphatics molecules are linear or branched open-chain structures such as n-alkanes, isoalkanes, cycloalkanes (naphthenes), terpenes and steranes.Quality Control of Diethyl 2-methylmalonate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Quality Control of Ethyl 2-amino-2-thioxoacetateIn 2019 ,《Design, synthesis, and biological evaluation of novel dual FFA1 (GPR40)/PPARδ agonists as potential anti-diabetic agents》 appeared in Bioorganic Chemistry. The author of the article were Li, Zheng; Hu, Lijun; Wang, Xuekun; Zhou, Zongtao; Deng, Liming; Xu, Yawen; Zhang, Luyong. The article conveys some information:

The free fatty acid receptor 1 (FFA1) and peroxisome proliferator-activated receptor δ (PPARδ) were considered as potential anti-diabetic targets, and the dual FFA1/PPARδ agonists might provide synergistic effect in insulin secretion and sensibility. Herein, we further develop dual agonists by screening 7 series of heterocycles, resulting in the discovery of compound 19 with considerable oral pharmacokinetic profile. Compound 19 exhibited a balanced potency between FFA1 and PPARδ, and high selectivity over PPARα and PPARγ. Moreover, compound 19 exerted improved glucose-lowering effects and insulin sensitivity in a dose-dependent manner, which might be attributed to its dual effects to simultaneously regulate insulin secretion and resistance. Our results extended the existing chem. space, and provided a potent tool compound 19. After reading the article, we found that the author used Ethyl 2-amino-2-thioxoacetate(cas: 16982-21-1Quality Control of Ethyl 2-amino-2-thioxoacetate)

Ethyl 2-amino-2-thioxoacetate(cas: 16982-21-1) belongs to anime. Hydrogen peroxide (H2O2) and peroxy acids generally add an oxygen atom to the nitrogen of amines. With primary amines, this step is normally followed by further oxidation, leading to nitroso compounds, RNO, or nitro compounds, RNO2. Secondary amines are converted to hydroxylamines, R2NOH, and tertiary amines to amine oxides, R3NO.Quality Control of Ethyl 2-amino-2-thioxoacetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

In 2022,Yu, Xiangzhu; Zhao, Zhengjia; Zhu, Lina; Tan, Shangzhi; Fu, Weiru; Wang, Lianyue; An, Yue published an article in Molecular Catalysis. The title of the article was 《Aerobic oxidative cleavage and esterification of C=C bonds catalyzed by iron-based nanocatalyst》.SDS of cas: 403-33-8 The author mentioned the following in the article:

An efficient protocol for the direct formation of esters by oxidative cleavage of C=C bonds using heterogeneous iron nanocomposite catalyst supported on nitrogen-doped carbon materials with mol. oxygen and tert-butylhydroperoxide (TBHP) as the oxidants was reported. The results showed that mol. oxygen as the terminal oxidant was mainly responsible for the cleavage process, and that the auxiliary oxidant TBHP promotes the formation of the intermediate epoxide, thus increasing the selectivity of the product. The catalytic system has a wide range of substrate compatibility involving the challenging inactive aliphatic and long-chain alkyl aryl olefins. The catalyst was reused seven times with no loss in catalytic activity. Characterization and control experiments uncovered that the core-shell Fe and Fe3C nanoparticles encapsulated by graphitic carbon play a predominant role in catalyzing the oxidative cleavage of olefins to esters. Preliminary mechanistic studies disclosed that this process involved both free radical reactions and tandem sequential reactions. In the experiment, the researchers used many compounds, for example, Methyl 4-fluorobenzoate(cas: 403-33-8SDS of cas: 403-33-8)

Methyl 4-fluorobenzoate(cas: 403-33-8) can be used in the synthesis of trisubstituted imidazole derivatives containing a 4-fluorophenyl group, a pyrimidine ring, and a CN- or CONH2-substituted benzyl moiety.SDS of cas: 403-33-8

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

In 2022,Delamare, Aline; Naulet, Guillaume; Kauffmann, Brice; Guichard, Gilles; Compain, Guillaume published an article in Chemical Science. The title of the article was 《Hexafluoroisobutylation of enolates through a tandem elimination/allylic shift/hydrofluorination reaction》.Product Details of 609-14-3 The author mentioned the following in the article:

The first general method to introduce the hexafluoroisobutyl group into ketoesters, malonates, 1,3-diketones, Schiff base esters and malononitrile C(R)(R1)(R2)CH2CH(CF3)2 [R = C(O)Me, C(O)OEt, C(O)C6H5, etc.; R1 = C(O)OEt, C(O)Me, CN, etc.; R2 = Me, i-Pr, Bn, etc.] was reported. The reaction occurs through an elimination/allylic shift/hydrofluorination cascade process which efficiently overcomes the usual fluoride β-elimination observed with α-CF3-vinyl groups. The alkali metal bases, a pentafluorinated alkene is obtained predominantly, whereas the use of tetrabutylammonium fluoride (TBAF) allows hydrofluorination to occur. This tandem process represents a conceptually new pathway to synthesize bis-trifluoromethylated compounds This methodol. was applied to the multigram-scale synthesis of enantiopure (S)-5,5,5,5′,5′,5′-hexafluoroleucine. In the part of experimental materials, we found many familiar compounds, such as Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3Product Details of 609-14-3)

Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3) belongs to ketone compounds. They are most widely used as solvents, especially in industries manufacturing explosives, lacquers, paints, and textiles. Ketones are also used in tanning, as preservatives, and in hydraulic fluids.Product Details of 609-14-3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhang, Liang; Liu, Shuhua; Lin, Yunliang; Wang, Yuliang published an article in 2022. The article was titled 《Hydroxymethylation of active methenyl compounds: DMSO as methylene source and H2O as oxygen source》, and you may find the article in Tetrahedron Letters.Recommanded Product: 609-14-3 The information in the text is summarized as follows:

A mild and efficient method for hydroxymethylation of active methenyl compounds was described. In this transformation, the widely available solvents DMSO and water served as methylene and oxygen sources, resp. Under promotion of activator and base, the reaction could be used for the construction of a series of α-hydroxymethylated carbonyl compounds R1COC(CH2OH)R2R3 [R1 = Me, Ph, Bn, 2-furyl, 2-thienyl; R2 = CN, MeCO, MeO2C, EtO2C, t-BuO2C, PhNHCO; R3 = Me, Et, Bn, etc.; R1R3 = (CH2)3, H2COCH2, (CH2)4, etc.] with all-carbon quaternary carbon center in good to excellent yield. After reading the article, we found that the author used Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3Recommanded Product: 609-14-3)

Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3) belongs to ketone compounds. Ketones are highly reactive, although less so than aldehydes, to which they are closely related. Much of their chemical activity results from the nature of the carbonyl group. Ketones readily undergo a wide variety of chemical reactions.Recommanded Product: 609-14-3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Li, Ang; Forte, Jeremy; Li, Yanling; Journaux, Yves; Lisnard, Laurent published an article in 2021. The article was titled 《Synthesis, structure and magnetic properties of an oxamate-based 1D coordination polymer built on pentametallic links》, and you may find the article in Inorganica Chimica Acta.Recommanded Product: Ethyl oxalyl monochloride The information in the text is summarized as follows:

The solvothermal reaction of the hexadentate 2-(oxamato)benzoic acid ligand (oaba) with copper(II) and cobalt(II) ions has yielded the [Cu4Co3(oaba)4(OH)2(DMF)6]·2(DMF)·1H2O (1) 1D coordination polymer. The single-crystal x-ray diffraction study reveals the formation of a neutral chain built from pentametallic complexes where each multi-polydentate ligand bridges four metal centers. The atypical morphol. observed here for an oxamate-based 1D polymer arises from the use of a ligand bearing extra coordination sites. Magnetometry indicates strong dominating antiferromagnetic interactions within the polymer resulting in a non-zero ferrimagnetic state at low temperature The results came from multiple reactions, including the reaction of Ethyl oxalyl monochloride(cas: 4755-77-5Recommanded Product: Ethyl oxalyl monochloride)

Ethyl oxalyl monochloride(cas: 4755-77-5) belongs to acyl chlorides. Lacking the ability to form hydrogen bonds, acyl chlorides have lower boiling and melting points than similar carboxylic acids. For example, acetic acid boils at 118 °C, whereas acetyl chloride boils at 51 °C. Like most carbonyl compounds, infrared spectroscopy reveals a band near 1750 cm−1.Recommanded Product: Ethyl oxalyl monochloride

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics