Month: November 2022

In 2019,Chem included an article by Deng, Ruixian; Xi, Junwei; Li, Qigang; Gu, Zhenhua. Application In Synthesis of 1-Bromo-4-(trifluoromethyl)benzene. The article was titled 《Enantioselective Carbon-Carbon Bond Cleavage for Biaryl Atropisomers Synthesis》. The information in the text is summarized as follows:

Development of new synthetic strategies for enantioselective carbon-carbon and carbon-heteroatom bond formation is one of the pillars of modern organic chem. Whereas significant advances have been achieved in center chirality construction, catalytically asym. construction of axial chirality is still under development. Moreover, axially chiral mols. constructed through carbon-carbon and carbon-heteroatom bond cleavage are extremely limited. Authors report an asym. synthesis of biaryl atropisomers I (R = OCF3, Ph, CO2tBu, etc.; R2 = Ph, 3-MeC6H4, 4-ClC6H4, etc.; Ar3 = Ph, p-Tol, 2-thienyl, etc.) via palladium-catalyzed chemoselective carbon-carbon cleavage of 9-aryl-9H-fluoren-9-ols. The reaction demonstrated broad substrate scope and produced the atropisomers in high yields and enantioselectivity. The ring-opening reactivity was considerably accelerated by the torsional strain created by the steric repulsion between two ortho-substituents of the biaryl skeleton in the substrates. The high enantiocontrol hinges on the evolvement of a new TADDOL-based phosphoramidite as ligand. These findings set up a new platform for the development of novel synthetic methods via asym. carbon-carbon cleavage. The experimental process involved the reaction of 1-Bromo-4-(trifluoromethyl)benzene(cas: 402-43-7Application In Synthesis of 1-Bromo-4-(trifluoromethyl)benzene)

1-Bromo-4-(trifluoromethyl)benzene(cas: 402-43-7) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Alkyl bromides are mainly used as alkylating agents and also find application as a solvent to extract oil from seeds and wool. Application In Synthesis of 1-Bromo-4-(trifluoromethyl)benzene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Huang, Cheng; Qiao, Jia; Ci, Rui-Nan; Wang, Xu-Zhe; Wang, Yang; Wang, Jing-Hao; Chen, Bin; Tung, Chen-Ho; Wu, Li-Zhu published their research in Chem in 2021. The article was titled 《Quantum dots enable direct alkylation and arylation of allylic C(sp3)-H bonds with hydrogen evolution by solar energy》.Name: Benzyl 2-bromoacetate The article contains the following contents:

A general and mild strategy using semiconductor quantum dots (QDs) as photocatalysts for coupling a broad range of available allylic C(sp3)-H bonds with α-amino C-H bonds or heteroarenes, resp., under sunlight irradiation (> 85 examples) was reported. The protocol bypasses stoichiometric oxidant or reductant and pre-functionalization of both the coupling partners and produces hydrogen (H2) as the byproduct. The outstanding efficiency and selectivity and step- and atom-economy represents the first direct alkylation and arylation of allylic C(sp3)-H bonds with hydrogen evolution powered by solar energy. The experimental process involved the reaction of Benzyl 2-bromoacetate(cas: 5437-45-6Name: Benzyl 2-bromoacetate)

Benzyl 2-bromoacetate(cas: 5437-45-6) belongs to benzyl acetate. Benzyl acetate is a synthetic chemical produced for industry from benzyl alcohol and acetic acid, but is also naturally present in the essential oils of many plants, including jasmine and ylang ylang.Name: Benzyl 2-bromoacetate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yan, Si-Shun; Liu, Shi-Han; Chen, Lin; Bo, Zhi-Yu; Jing, Ke; Gao, Tian-Yu; Yu, Bo; Lan, Yu; Luo, Shu-Ping; Yu, Da-Gang published an article in 2021. The article was titled 《Visible-light photoredox-catalyzed selective carboxylation of C(sp3)-F bonds with CO2》, and you may find the article in Chem.Category: bromides-buliding-blocks The information in the text is summarized as follows:

A novel selective carboxylation of C(sp3)-F bonds with CO2 via visible-light photoredox catalysis. A variety of mono-, di-, and trifluoroalkylarenes as well as α,α-difluorocarboxylic esters and amides undergo such reactions to give important aryl acetic acids and α-fluorocarboxylic acids, including several drugs and analogs, under mild conditions. Notably, mechanistic studies and DFT calculations demonstrate the dual role of CO2 as an electron carrier and electrophile during this transformation. The fluorinated substrates would undergo single-electron reduction by electron-rich CO2 radical anions, which were generated in situ from CO2 via sequential hydride-transfer reduction and hydrogen-atom-transfer processes. The experimental process involved the reaction of Methyl 3-(bromomethyl)benzoate(cas: 1129-28-8Category: bromides-buliding-blocks)

Methyl 3-(bromomethyl)benzoate(cas: 1129-28-8) 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. Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hu, Hao; Ichiryu, Hiroki; Nakajima, Kiyohiko; Ogasawara, Masamichi published an article in 2021. The article was titled 《Estimating Effective Steric and Electronic Impacts of a Ferrocenyl Group in Organophosphines》, and you may find the article in ACS Omega.Computed Properties of C7H5BrO2 The information in the text is summarized as follows:

A series of monodentate ferrocenylphosphines, Fc3P (1a), Fc2PhP (1b), and Fc2ArP (1c; Fc = ferrocenyl, Ar = 3,4-methylenedioxyphenyl), were prepared, and their electronic and steric properties were quant. determined By the IR measurements of their resp. Ni(CO)3(phosphine) complexes, the electronic properties of the ferrocenyl group in organophosphines were estimated to be similar to those of primary alkyl groups. The ferrocenyl group is a better electron donor than a Me group and a poorer donor than an Et group. The gold(I) chloride complexes of 1a-c were prepared and their X-ray crystal structures were determined The %Vbur parameters for 1a-c were calculated using the X-ray structural data, and their ”Tolman cone angles” were estimated The steric influence of the ferrocenyl group in organophosphines was clarified to be larger than those of cyclohexyl, tert-Bu, and o-tolyl groups and is comparable to that of a mesityl group. In addition to this study using 5-Bromobenzo[d][1,3]dioxole, there are many other studies that have used 5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4Computed Properties of C7H5BrO2) was used in this study.

Furthermore, the coupling of 5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4) with β-methallyl alcohol was catalyzed by Pd(OAc)2 in combination with P(t-Bu)3.Computed Properties of C7H5BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Recommanded Product: 4-Bromobenzoic acidIn 2021 ,《DEAD-Mediated Oxidative Ugi/Aza-Wittig Reaction for the Synthesis of 5-(1,2,3,4-Tetrahydroisoquinolin-1-yl)-1,3,4-oxadiazoles Starting from (N-Isocyanimine)triphenylphosphorane》 was published in Synthesis. The article was written by Sun, Mei; Zhao, Long; Yu, Yan-Ling; Ding, Ming-Wu. The article contains the following contents:

A one-pot protocol for the synthesis of 5-(1,2,3,4-tetrahydroisoquinolin-1-yl)-1,3,4-oxadiazoles I [R1 = Me, i-Pr, 4-MeC6H4, etc.; R2 = H, 6,7-di-MeO; Ar = Ph, 4-MeC6H4, 2-ClC6H4, 4-BrC6H4] via DEAD-mediated oxidative Ugi/aza-Wittig reaction was developed. The reaction of (N-isocyanimine)triphenylphosphorane, carboxylic acids and N-aryl-1,2,3,4-tetrahydroisoquinolines produced polysubstituted 5-(1,2,3,4-tetrahydroisoquinolin-1-yl)-1,3,4-oxadiazoles directly in good yields in the presence of DEAD as an oxidant. In the experimental materials used by the author, we found 4-Bromobenzoic acid(cas: 586-76-5Recommanded Product: 4-Bromobenzoic acid)

4-Bromobenzoic acid(cas: 586-76-5) has been used to study the metabolic fate of 2-,3-and 4-bromo benzoic acids in rat hepatocytes incubation using high temperature liquid chromatography. It was used in bromine-specific detection of the metabolites of 2-,3-and 4-bromobenzoic acid in the urine and bile of rats by inductively coupled plasma mass spectrometry.Recommanded Product: 4-Bromobenzoic acid

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Synlett included an article by Cao, Hongen; Chen, Tian; Yang, Chenggen; Ye, Jianqing; Zhang, Xu. SDS of cas: 586-76-5. The article was titled 《Diphenyl Diselenide Catalyzed Oxidative Degradation of Benzoin to Benzoic Acid》. The information in the text is summarized as follows:

The di-Ph diselenide catalyzed oxidative degradation of benzoins RC(O)CH(OH)R (R = Ph, 4-tolyl, benzyl, etc.) to benzoic acids RCOOH has been reported. As this reaction can convert the malodorous compound into an odorless and innocuous product under mild conditions, it might be useful for pollutant disposal. The reaction does not require a transition-metal catalyst or a chem. oxidant, so that it can be performed at low cost and without generation of wastes. This is believed to be the first example of the use of organoselenium catalysis technol. in pollutant destruction, thereby expanding its range of applications. In the experiment, the researchers used many compounds, for example, 4-Bromobenzoic acid(cas: 586-76-5SDS of cas: 586-76-5)

4-Bromobenzoic acid(cas: 586-76-5) has been used in bromine-specific detection of the metabolites of 2-,3-and 4-bromobenzoic acid in the urine and bile of rats by inductively coupled plasma mass spectrometry.SDS of cas: 586-76-5 It was used to study the metabolic fate of 2-,3-and 4-bromo benzoic acids in rat hepatocytes incubation using high temperature liquid chromatography.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Optical detection of fe3+ ions in aqueous solution with high selectivity and sensitivity by using sulfasalazine functionalized microgels》 were Ji, Weiming; Zhu, Zumei; Dong, Shunni; Nie, Jingjing; Du, Binyang. And the article was published in Sensors in 2019. Recommanded Product: 1,6-Dibromohexane The author mentioned the following in the article:

A highly selective and sensitive optical sensor was developed to colorimetric detect trace Fe3+ ions in aqueous solution The sensor was the sulfasalazine (SSZ) functionalized microgels (SSZ-MGs), which were fabricated via in-situ quaternization reaction. The obtained SSZ-MGs had hydrodynamic radius of about 259 ± 24 nm with uniform size distribution at 25°C. The SSZ-MG aqueous suspensions can selectively and sensitively response to Fe3+ ions in aqueous solution at 25°C and pH of 5.6, which can be quantified by UV-visible spectroscopy and also easily distinguished by the naked eye. Job’s plot indicated that the molar binding ratio of SSZ moiety in SSZ-MGs to Fe3+ was close to 1:1 with an apparent association constant of 1.72 x 104 M-1. A linear range of 0-12μM with the detection limit of 0.110μM (0.006 mg/L) was found. The obtained detection limit was much lower than the maximum allowance level of Fe3+ ions in drinking water (0.3 mg/L) regulated by the Environmental Protection Agency (EPA) of the United States. The existence of 19 other species of metal ions, namely, Ag+, Li+, Na+, K+, Ca2+, Ba2+, Cu2+, Ni2+, Mn2+, Pb2+, Zn2+, Cd2+, Co2+, Cr3+, Yb3+, La3+, Gd3+, Ce3+-, and Bi3+, did not interfere with the detection of Fe3+ ions. In the experimental materials used by the author, we found 1,6-Dibromohexane(cas: 629-03-8Recommanded Product: 1,6-Dibromohexane)

1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of pyrrolo-tetrathiafulvalene molecular bridge (6PTTF6) to study redox switching behavior of single molecules; synthesis of water-soluble thermoresponsive polylactides.Recommanded Product: 1,6-Dibromohexane

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

He, Xiaohui; Zou, Jianhua; Guo, Yan; Wang, Kai; Wu, Bin; Wen, Yufei; Zang, Xiujing; Chen, Defu published their research in Polymer in 2021. The article was titled 《Synthesis of halogenated benzonorbornadiene monomer and preparation of self-crosslinking bisimidazole cationic functionalized benzonorbornadiene triblock copolymer anion exchange membrane》.Synthetic Route of C6H12Br2 The article contains the following contents:

In this paper, a series of anion exchange membranes of bisimidazolium functionalized triblock copolymers were synthesized by ring-opening metathesis polymerization of alkyl bromide functionalized benzonorbornadiene derivatives, 1,2-di-Me imidazole and epoxy functionalized norbornene under the action of Grubbs 2nd catalyst. The designed decomposition temperature of the triblock copolymer anion exchange membrane (AEM) exceeded 320 °C, which was much higher than the actual working temperature of anion exchange membrane fuel cell. TEM and AFM characterization proved that the AEM had formed an obvious microphase separation structure. The OH- conductivity of AEM-40 at 80 °C was as high as 56.09 mS cm-1. The single cell performance of the prepared AEM was tested at 60 °C, and we found that AEM-40 reached the highest power d. of 189.1 mW cm-2 at 352.1 mA cm-2. The experimental part of the paper was very detailed, including the reaction process of 1,6-Dibromohexane(cas: 629-03-8Synthetic Route of C6H12Br2)

1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of pyrrolo-tetrathiafulvalene molecular bridge (6PTTF6) to study redox switching behavior of single molecules; synthesis of water-soluble thermoresponsive polylactides.Synthetic Route of C6H12Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Ping; Lee, Boon Chong; Zhang, Xiaoxiang; Koh, Ming Joo published an article in 2022. The article was titled 《Base-Mediated Site-Selective Hydroamination of Alkenes》, and you may find the article in Synthesis.Application In Synthesis of Ethyltriphenylphosphonium bromide The information in the text is summarized as follows:

A base-mediated hydroamination protocol, using substoichiometric amounts of a hydrosilane and potassium tert-butoxide, that operates under mild conditions at 30° is presented. Many aryl- and heteroatom-substituted olefins as well as arylamines are tolerated, affording the desired products with complete regioselectivity. Preliminary mechanistic investigations reveal a non-radical pathway for hydroamination. A sequential remote hydroamination strategy involving an initial Fe-catalyzed olefin isomerization followed by the base-mediated hydroamination was also developed to directly access β-arylamines from terminal aliphatic alkenes. In addition to this study using Ethyltriphenylphosphonium bromide, there are many other studies that have used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Application In Synthesis of Ethyltriphenylphosphonium bromide) was used in this study.

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Application In Synthesis of Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Wang, Weijie; An, Ruiqi; Wang, Tong; Li, Hongxiang; Zhang, Jidong; Tian, Hongkun; Wu, Xiaofu; Tong, Hui; Wang, Lixiang published an article in Giant. The title of the article was 《Nitrogen-bridged star-shaped fused-ring electron acceptors for organic solar cells》.Synthetic Route of C4H2Br2S The author mentioned the following in the article:

Two kinds of nitrogen-bridged star-shaped fused-ring electron acceptors based on benzo[1,2-b:3,4-b′-5,6-b””]tri(4-H-dithieno[3,2-b:2′,3′-d]pyrrole) (BTDTP) core with linear and branched alkyl side chains on bridging nitrogen atoms are developed. Both electron acceptors exhibit strong intramol. charge transfer absorption bands at 500-800 nm (molar extinction coefficient of 3.0 x 105 M-1 cm-1) with narrow optical bandgaps around 1.58 eV, but reveal different mol. packing and morphol. Compared to acceptor with linear side chains, the acceptor bearing branched side chains exhibits ordered face-on orientation with tight π-π stacking, as well as more favorable phase separation morphol. and balanced charge transport when blended with polymer donor PM6. Organic solar cell device based on acceptors bearing branched side chains achieves a power conversion efficiency (PCE) of 9.95% with a fill factor of 74.98% and a short-circuit c.d. of 14.90 mA cm-2, which is much superior to the device using acceptors bearing linear side chains (a PCE of 6.74%). The experimental process involved the reaction of 2,5-Dibromothiophene(cas: 3141-27-3Synthetic Route of C4H2Br2S)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used as starting reagent for the synthesis of α,α′-didecylquater-, -quinque- and -sexi-thiophenes.Synthetic Route of C4H2Br2S

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary