Tag: 100-200

Designing effective homogeneous catalysis for glycerol valorisation: selective synthesis of a value-added aldehyde from 1,3-propanediol via hydrogen transfer catalysed by a highly recyclable, fluorinated Cp*Ir(NHC) catalyst was written by Ma, Yueyuan;Wang, Yue-Ming;Morgan, Patrick J.;Jackson, Rachael E.;Liu, Xiao-han;Saunders, Graham C.;Lorenzini, Fabio;Marr, Andrew C.. And the article was included in Catalysis Today in 2018.Quality Control of 2-(Bromomethyl)-1,3-dimethylbenzene This article mentions the following:

Hydrogen transfer initiated dehydration (HTID) of 1,3-propanediol (1,3-PDO), in ionic liquids, catalyzed by a fluorinated Cp*IrCl₂(NHC) (Cp* = pentamethylcyclopentadienyl; NHC = carbene ligand) complex, allows selective production of propionaldehyde in high yields, under air. Isolation of the product is facilitated by the use of an ionic liquid as the solvent, enabling the reaction to be performed under reduced pressure. The Ir(III) catalyst in ionic liquid was proven to be highly recyclable. Removal of H and F atoms bound to the ortho-C atoms of the benzyl arm of the carbene ligand inhibits the catalytic activity of complexes CpIrCl₂(NHC), suggesting a crucial role played by the ortho-C-X grouping in HTID. The reaction of 1,3-PDO solutions in ionic liquids mimics that of the product of extraction of aqueous glycerol fermentation broths: the successful synthesis and isolation of a value-added chem. proves that valorization of glycerol waste can be achieved. The combination of Cp*IrX₂(NHC) – catalyzed HTID of 1,3-PDO in ionic liquids with bio-catalysis has then, ultimately, the potential to allow the transformation of waste glycerol into valuable chems. that can be simply isolated. In the experiment, the researchers used many compounds, for example, 2-(Bromomethyl)-1,3-dimethylbenzene (cas: 83902-02-7Quality Control of 2-(Bromomethyl)-1,3-dimethylbenzene).

2-(Bromomethyl)-1,3-dimethylbenzene (cas: 83902-02-7) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Quality Control of 2-(Bromomethyl)-1,3-dimethylbenzene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

A Charge-Neutral Self-Assembled L₂Zn₂ Helicate as Bench-Stable Receptor for Anion Recognition at Nanomolar Concentration was written by Van Craen, David;Kalarikkal, Malavika G.;Holstein, Julian J.. And the article was included in Journal of the American Chemical Society in 2022.Safety of 1-Bromopyrrolidine-2,5-dione This article mentions the following:

The field of anion recognition chem. is dominated by two fundamental approaches to design receptors. One relies on the formation of covalent bonds resulting in organic and often neutral host species, while the other one utilizes metal-driven self-assembly for the formation of charged receptors with well-defined nanocavities. Yet, the combination of their individual advantages in the form of charge-neutral metal-assembled bench-stable anion receptors is severely lacking. Herein, we present a fluorescent and uncharged double-stranded hydroxyquinoline-based zinc(II) helicate with the ability to bind environmentally relevant dicarboxylate anions with high fidelity in DMSO at nanomolar concentrations These dianions are pinned between zinc(II) centers with binding constants up to 145 000 000 M^-1. The presented investigation exemplifies a pathway to bridge the two design approaches and combine their strength in one structural motif as an efficient anion receptor. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Safety of 1-Bromopyrrolidine-2,5-dione).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. Organobromine compounds have fallen under increased scrutiny for their environmental impact. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Safety of 1-Bromopyrrolidine-2,5-dione

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Acid-free fabrication of polyaryletherketone membranes was written by Aristizabal, Sandra L.;Upadhyaya, Lakshmeesha;Falca, Gheorghe;Gebreyohannes, Abaynesh Yihdego;Aijaz, Mohammed Omer;Karim, Mohammad Rezaul;Nunes, Suzana P.. And the article was included in Journal of Membrane Science in 2022.Related Products of 128-08-5 This article mentions the following:

Polyaryletherketones (PAEKs) are a class of ultrahigh performance polymers with outstanding temperature and chem. resistance. Poly(ether ketone ketone) copolymer (Kepstan) and poly(ether ether ketone) (PEEK) display intrinsic insolubility in nearly all organic solvents. The primary issue for the application of these polymers is their processability which requires a high temperature/pressure-based technique, or the use of harsh and corrosive solvents, like methanesulfonic and sulfuric acid, resulting in sulfonation of the polymer backbone that adversely might affect their chem. stability. In this work, we propose a method to prepare porous Kepstan and PEEK membranes using N-methyl-2-pyrrolidone (NMP) as solvent at room temperature It consisted of a modification-regeneration strategy to turn com. semi-crystalline Kepstan and PEEK into dithiolane soluble derivatives that allow the fabrication of hollow fiber, flat-sheet, and electrospun nanofibers. The resulting membranes are then regenerated to the solvent-resistant materials. The novel Kepstan and PEEK hollow fibers exhibited a N,N-dimethylformamide (DMF) permeance of 2.21 and 2.05 L m^-2 h^-2 bar^-1, with more than 90% rejection of crystal violet (408 g mol^-1) and methyl orange (327 g mol^-1), resp. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Related Products of 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Related Products of 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Friedel-Crafts reactions of long-chain compounds substituted by a polar group was written by Matsuda, Sumio. And the article was included in Kenkyu Hokoku – Asahi Garasu Kogyo Gijutsu Shoreikai in 1973.SDS of cas: 4457-67-4 This article mentions the following:

Friedel-Crafts alkylation of C6H6 with 1-methoxy-2-, 1-methoxy-5-, and 1-methoxy-7-chlorooctane in the presence of AlCl3 gave 1-methoxy-n-phenyloctanes (n = 3-7) with various isomer compositions Alkylation at the C atoms near the MeO group was retarded by its electron withdrawing inductive effect. The inductive effects were also transmitted through the chain. In the experiment, the researchers used many compounds, for example, 1-Bromo-4-methoxybutane (cas: 4457-67-4SDS of cas: 4457-67-4).

1-Bromo-4-methoxybutane (cas: 4457-67-4) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.SDS of cas: 4457-67-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Metal-Free TEMPO-Promoted C(sp³)-H Amination To Afford Multisubstituted Benzimidazoles was written by Xue, Ding;Long, Ya-Qiu. And the article was included in Journal of Organic Chemistry in 2014.Name: 2-(Bromomethyl)-1,3-dimethylbenzene This article mentions the following:

An efficient TEMPO-air/cat.TEMPO-O₂ oxidative protocol was developed to synthesize multisubstituted or fused tetracyclic benzimidazoles via a metal-free oxidative C-N coupling between the sp³ C-H and free N-H of readily available N¹-benzyl/alkyl-1,2-phenylenediamines. In the experiment, the researchers used many compounds, for example, 2-(Bromomethyl)-1,3-dimethylbenzene (cas: 83902-02-7Name: 2-(Bromomethyl)-1,3-dimethylbenzene).

2-(Bromomethyl)-1,3-dimethylbenzene (cas: 83902-02-7) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Name: 2-(Bromomethyl)-1,3-dimethylbenzene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Rh(III)-Catalyzed One-Step Synthesis of ortho-Alkynylated Perylene Imide Dyes: Optical and Electrochemical Properties of New Derivatives was written by Chand, Tapasi;Khamari, Laxmikanta;Chopra, Deepak;Mukherjee, Saptarshi;Kapur, Manmohan. And the article was included in Chemistry – A European Journal in 2022.Name: 1-Bromopyrrolidine-2,5-dione This article mentions the following:

A one-step Rh-catalyzed site-selective ortho-C-H alkynylation of perylene as well as naphthalene mono- and diimides is reported. A single step regioselective access to ortho-C-H alkynylated derivatives of these aryleneimides not only increases the step economy of the ortho-functionalization on these dyes but also provides a quick access route toward highly functionalized dyes that have potential optoelectronic applications. Increased solubility of tetra(triisopropylsilyl)acetylenyl PDIs in organic solvents greatly enhances their utility for further derivatization. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Name: 1-Bromopyrrolidine-2,5-dione).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Name: 1-Bromopyrrolidine-2,5-dione

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Regio- and Enantioselective Ni-Catalyzed Formal Hydroalkylation, Hydrobenzylation, and Hydropropargylation of Acrylamides to α-Tertiary Amides was written by Shi, Lou;Xing, Ling-Ling;Hu, Wen-Bo;Shu, Wei. And the article was included in Angewandte Chemie, International Edition in 2021.Category: bromides-buliding-blocks This article mentions the following:

The development of enantioselective alkyl-alkyl cross-couplings with coinstantaneous formation of a stereogenic center without the use of sensitive organometallic species is attractive yet challenging. Herein, we report the intermol. regio- and enantioselective formal hydrofunctionalizations of acrylamides, forging a stereogenic center α-position to the newly formed C_sp3-C_sp3 bond for the first time. The use of a newly developed chiral ligand enables the electronically-reversed formal hydrofunctionalizations, including hydroalkylation, hydrobenzylation, and hydropropargylation, offering an efficient way to access diverse enantioenriched amides with a tertiary α-stereogenic carbon center which is facile to racemize. This operationally simple protocol allows for the anti-Markovnikov enantioselective hydroalkylation, and unprecedented hydrobenzylation, hydropropargylation under mild conditions with excellent functional group compatibility, delivering a wide range of amides with excellent levels of enantioselectivity. In the experiment, the researchers used many compounds, for example, 1-Bromo-4-methoxybutane (cas: 4457-67-4Category: bromides-buliding-blocks).

1-Bromo-4-methoxybutane (cas: 4457-67-4) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

A Facile Stereoselective Bis-Trifluoromethylselenolation Reaction of Alkynes with AgSeCF₃ and N-Bromosuccinimide was written by Wang, Zhenyu;Cao, Chengyao Kimmy;Tretyakov, Evgeny;Liu, Wei;Chen, Chao. And the article was included in Asian Journal of Organic Chemistry in 2022.HPLC of Formula: 128-08-5 This article mentions the following:

A facile stereoselective bis-trifluoromethylselenolation reaction of alkyne derivatives was realized for the first time. The reaction of alkyne derivatives and AgSeCF₃ was found to proceed in the presence of N-bromosuccinimide and water in THF and afforded bis-trifluoromethylselenolated products in moderate-to-excellent yields. The new methodol. enables one-pot synthesis with a broad substrate range. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5HPLC of Formula: 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.HPLC of Formula: 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

General Method for the Amination of Aryl Halides with Primary and Secondary Alkyl Amines via Nickel Photocatalysis was written by Song, Geyang;Nong, Ding-Zhan;Li, Jing-Sheng;Li, Gang;Zhang, Wei;Cao, Rui;Wang, Chao;Xiao, Jianliang;Xue, Dong. And the article was included in Journal of Organic Chemistry in 2022.Recommanded Product: 452-62-0 This article mentions the following:

It was reported that Ni(II)-bipyridine complex catalyzed efficient C-N coupling of aryl chlorides and bromides with various primary and secondary alkyl amines under direct excitation with light. Intramol. C-N coupling was also demonstrated. The feasibility and applicability of the protocol in organic synthesis was attested by more than 200 examples. In the experiment, the researchers used many compounds, for example, 3-Bromo-4-fluorotoluene (cas: 452-62-0Recommanded Product: 452-62-0).

3-Bromo-4-fluorotoluene (cas: 452-62-0) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Recommanded Product: 452-62-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Proton nuclear magnetic resonance spectra of aryl and mono- and disubstituted N-methylazoles was written by Butler, Richard Noel. And the article was included in Canadian Journal of Chemistry in 1973.Recommanded Product: 13273-53-5 This article mentions the following:

Proton NMR spectra of substituted azoles, e.g., methylpyrrole, imidazoles, pyrazoles, etc., are compared. The influence of the azole ring on the chem. shifts of phenyl protons is discussed. A correlation between N-Me chem. shifts and the structural characteristics of the N-Me group in mono- and disubstituted azoles is noted. In the experiment, the researchers used many compounds, for example, 4-Bromo-1-methyl-1H-1,2,3-triazole (cas: 13273-53-5Recommanded Product: 13273-53-5).

4-Bromo-1-methyl-1H-1,2,3-triazole (cas: 13273-53-5) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Recommanded Product: 13273-53-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary