Tag: 200-300

Liu, Yong-Liang; Wang, Xiao-Ping; Wei, Jie; Li, Ya published an article in 2022. The article was titled 《PPh3-catalyzed β-selective addition of α-fluoro β-dicarbonyl compounds to allenoates》, and you may find the article in Tetrahedron.Synthetic Route of C9H9BrO2 The information in the text is summarized as follows:

A highly selective phosphine-catalyzed β-addition of α-fluoro β-dicarbonyl compounds to allenoates was developed. Both α-fluoro β-diketones and α-fluoro β-keto esters prove to be competent fluorocarbon nucleophiles, giving a series of the β-addition products bearing a fluorinated quaternary carbon center in good to excellent yields and with excellent regioselectivities. A plausible reaction pathway was presented. In the experiment, the researchers used many compounds, for example, Benzyl 2-bromoacetate(cas: 5437-45-6Synthetic Route of C9H9BrO2)

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.Synthetic Route of C9H9BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hu, Qi-Long; Liu, Jia-Tian; Li, Jian; Ge, Yang; Song, Zhendong; Chan, Albert S. C.; Xiong, Xiao-Feng published an article in 2021. The article was titled 《Demethylative alkylation of methionine residue by employing the sulfonium as the key intermediate》, and you may find the article in Organic Letters.Computed Properties of C9H9BrO2 The information in the text is summarized as follows:

Methionine (Met) offers a valuable handle to achieve peptide chem. modification owing to its unique thioether functional group. In contrast with cysteine, the site-selective functionalization of the hydrophobic and redox-sensitive thioether motif on peptides is still challenging, and strategies for diversification on the Met residue are rarely disclosed. Herein we report a transition-metal-free and redox-neutral approach for Met diversification with substrate diversity, which could be applied to synthesize cyclic peptides. The experimental process involved the reaction of Benzyl 2-bromoacetate(cas: 5437-45-6Computed Properties of C9H9BrO2)

Benzyl 2-bromoacetate(cas: 5437-45-6) has been used in the alkylation of (-)-2,3-O-isopropylidene-D-threitol that afforded lipopeptide, 2-[(4R,5R)-5-({[(9H-fluoren-9-yl)methoxy]carbonylaminomethyl}-2,2-dimethyl-1,3-dioxolan-4-yl)methoxy]acetic acid.Computed Properties of C9H9BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gonzalez, Tania; Garcia, Juventino J. published an article in 2021. The article was titled 《Catalytic CO2 hydrosilylation with [Mn(CO)5Br] under mild reaction conditions》, and you may find the article in Polyhedron.Formula: C5BrMnO5 The information in the text is summarized as follows:

Carbon dioxide hydrosilylation with earth-abundant transition-metal catalysts is an attractive alternative for the design of greener and cost-effective synthetic strategies. Herein, simple [Mn(CO)5Br] is an efficient precatalyst in the hydrosilylation of carbon dioxide with Et3SiH under mild reaction conditions. Using THF as a solvent, triethylsilylformate Et3SiCH(O)O was obtained in 67% yield after 1 h at 50°C and 4 bar of CO2 pressure. The selectivity of the reaction was tuned by changing the solvent to a mixture of THF and toluene producing bis(triethylsilyl)acetal (Et3SiO)2CH2 in 86% yield. The CO2 hydrosilylation was also effective at room temperature and atm. pressure using either THF or the mixture THF/toluene as the solvent resulting in high Et3SiH conversion (92%-99%) but with a decrease in the selectivity. Radical trapping experiments indicated the participation of radical species in the catalytic mechanism. To the best of our knowledge, this is the first report on CO2 hydrosilylation catalyzed by transition-metal radical intermediates. In addition to this study using Bromopentacarbonylmanganese(I), there are many other studies that have used Bromopentacarbonylmanganese(I)(cas: 14516-54-2Formula: C5BrMnO5) was used in this study.

Bromopentacarbonylmanganese(I)(cas: 14516-54-2) has many other uses. It is used in the formation of (eta6-arene)tricarbonylmanganese(I) by reacting with arene (arene= hexamethyl benzene, 1,2,4,5-tetramethyl benzene, mesitylene, p-xylene and toluene) in the presence silver salt.Formula: C5BrMnO5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Weiwei; Zhang, Yaqin; Yang, Zifeng; Zhang, Zhencai; Fang, Wenjuan; Niu, Donghui; He, Hongyan; Xu, Fei published an article in 2021. The article was titled 《Efficient synthesis of isosorbide-based polycarbonate with scalable dicationic ionic liquid catalysts by balancing the reactivity of the endo-OH and exo-OH》, and you may find the article in Green Chemistry.Related Products of 629-03-8 The information in the text is summarized as follows:

In this study, a series of high-activity imidazole-based dicationic ionic liquids (DILs) were designed and prepared as efficient catalysts for balancing the reactivity between the endo-hydroxyl group (endo-OH) and the exo-hydroxyl group (exo-OH) of isosorbide (ISO) to synthesize high mol. weight poly(isosorbide carbonate) (PIC). Meanwhile, the thermal performance of PIC was precisely optimized by regulating the chain configuration. When the trace amounts (4.5 x 10-5 based on the ISO molar amount) of bis-(3-methyl-1-imidazole)-ethylene dibromide ([C2(Min)2][Br]2) were used, the weight average mol. weight (Mw) of PIC reached 98 700 g mol-1. It could be concluded from the results of the experiment and the stimulation that the high catalytic activity of DILs was attributed to the strong electrostatic interaction between the cation and the substrate and the effective balance of the reactivity of the endo-OH and the exo-OH. Furthermore, we found that the reduction of hydroxyl groups in the terminal groups and the increase of endo-endo (a1) structure in the repeating unit improved the thermal properties of PIC. Finally, 1H NMR, Fourier IR spectroscopy, and d. functional theory (DFT) calculations were used to verify the reaction process through anion and cation multi-site synergistic effect and a possible electrophilic-nucleophilic reaction mechanism was successfully obtained.1,6-Dibromohexane(cas: 629-03-8Related Products of 629-03-8) was used in this study.

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 solvent processable and conductive polyfluorene ionomers for alkaline fuel cell applications; synthesis of cross-linkable regioregular poly(3-(5-hexenyl)thiophene) (P3HNT) for stabilizing the film morphology in polymer photovoltaic cells.Related Products of 629-03-8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yamazaki, Ken; Gabriel, Pablo; Di Carmine, Graziano; Pedroni, Julia; Farizyan, Mirxan; Hamlin, Trevor A.; Dixon, Darren J. published an article in 2021. The article was titled 《General Pyrrolidine Synthesis via Iridium-Catalyzed Reductive Azomethine Ylide Generation from Tertiary Amides and Lactams》, and you may find the article in ACS Catalysis.Recommanded Product: 5437-45-6 The information in the text is summarized as follows:

An iridium-catalyzed reductive generation of both stabilized and unstabilized azomethine ylides and their application to functionalized pyrrolidines, e.g., I synthesis via [3+2] dipolar cycloaddition reactions was described. Proceeded under mild reaction conditions from both amide and lactam precursors, possessed a suitably positioned electron-withdrawing or a trimethylsilyl group, using catalytic Vaska’s complex [IrCl(CO)(PPh3)2] and tetramethyldisiloxane (TMDS) as a terminal reductant, a broad range of (un)stabilized azomethine ylides were accessible. Subsequent regio- and diastereoselective, inter- and intramol., and dipolar cycloaddition reactions with variously substituted electron-deficient alkenes enabled ready and efficient access to structurally complex pyrrolidine architectures. D. functional theory (DFT) calculations of the dipolar cycloaddition reactions uncovered an intimate balance between asynchronicity and interaction energies of transition structures, which ultimately control the unusual selectivities observed in certain cases. In the part of experimental materials, we found many familiar compounds, such as Benzyl 2-bromoacetate(cas: 5437-45-6Recommanded Product: 5437-45-6)

Benzyl 2-bromoacetate(cas: 5437-45-6) belongs to benzyl acetate. Benzyl acetate is an aromatic chemical, usually appearing as a clear liquid with a moderate sweet-jasmine fragrance. This compound appears as a component of some of our fragrance blends.Recommanded Product: 5437-45-6

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Xiaolan; Sun, Kai; Shen, Wenjuan; Zhang, Yong; Lu, Ming-Zhu; Luo, Xuzhong; Luo, Haiqing published their research in Organic Letters in 2021. The article was titled 《Rhodium(III)-Catalyzed Direct C-H Arylation of Various Acyclic Enamides with Arylsilanes》.HPLC of Formula: 2635-13-4 The article contains the following contents:

The stereoselective β-C(sp2)-H arylation of various acyclic enamides with arylsilanes via Rh(III)-catalyzed cross-coupling reaction was illustrated. The methodol. was characterized by extraordinary efficacy and stereoselectivity, a wide scope of substrates, good functional group tolerance, and the adoption of environmentally friendly arylsilanes. The utility of this present method was evidenced by the gram-scale synthesis and further elaboration of the product. In addition, Rh(III)-catalyzed C-H activation is considered to be the critical step in the reaction mechanism. The experimental process involved the reaction of 5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4HPLC of Formula: 2635-13-4)

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.HPLC of Formula: 2635-13-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2015,Sabitha, Gowravaram; Shankaraiah, Kontham; Sindhu, Kancherla; Latha, Bejawada Madhavi published 《Bismuth(III) Chloride Catalyzed Intramolecular Hetero-Diels-Alder Reaction: Access to cis-Fused Angular Hexahydrobenzo[c]acridines》.Synthesis published the findings.Product Details of 626-40-4 The information in the text is summarized as follows:

New polycyclic hexahydrobenzo[c]acridines were synthesized in excellent yields by intramol. [4+2]-cycloaddition reactions of aldimines derived from aromatic amines and 2-(4-methylpent-3-en-1-yl)benzaldehyde in acetonitrile in the presence of 10 mol% of bismuth(III) chloride. The reaction is highly diastereoselective, giving cis-fused benzoacridine derivatives preferentially. In addition to this study using 3,5-Dibromoaniline, there are many other studies that have used 3,5-Dibromoaniline(cas: 626-40-4Product Details of 626-40-4) was used in this study.

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime. Milder oxidation, using reagents such as NaOCl, can remove four hydrogen atoms from primary amines of the type RCH2NH2 to form nitriles (R―C≡N), and oxidation with reagents such as MnO2 can remove two hydrogen atoms from secondary amines (R2CH―NHR′) to form imines (R2C=NR′). Tertiary amines can be oxidized to enamines (R2C=CHNR2) by a variety of reagents.Product Details of 626-40-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Category: bromides-buliding-blocksOn June 5, 2020, Li, Ya-Wei; Zheng, Hong-Xing; Yang, Bo; Shan, Xiang-Huan; Qu, Jian-Ping; Kang, Yan-Biao published an article in Organic Letters. The article was 《tBuOK-Promoted Cyclization of Imines with Aryl Halides》. The article mentions the following:

A transition-metal-free indole synthesis using radical coupling of 2-halotoluenes and imines via the later-stage C-N bond construction was reported for the first time. It includes an aminyl radical generation by C-H cleaving addition of 2-halotoluenes to imines via the carbanion radical relay and an intramol. coupling of aryl halides with aminyl radicals. One standard condition can be used for all halides including F, Cl, Br, and I. No extra oxidant or transition metal is required. In the experiment, the researchers used 4-Bromo-1-(bromomethyl)-2-fluorobenzene(cas: 76283-09-5Category: bromides-buliding-blocks)

4-Bromo-1-(bromomethyl)-2-fluorobenzene(cas: 76283-09-5) belongs to organobromine compounds.The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. Dehydrobromination, Grignard reactions, reductive coupling, Wittig reaction, and several nucleophilic substitution reactions are some of the principal reactions which involve organic bromides.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Triphenylamine-based hole transporting materials with thiophene-derived bridges for perovskite solar cells》 was written by Wu, Guohua; Zhang, Yaohong; Kaneko, Ryuji; Kojima, Yoshiyuki; Sugawa, Kosuke; Islam, Ashraful; Otsuki, Joe; Liu, Shengzhong. Related Products of 3141-27-3This research focused ontriphenylamine thiophene hole transport material perovskite solar cell. The article conveys some information:

A triphenylamine-based compound containing benzoyl[1,2-b:4,5-b’]dithiophene (BDT) derivative (BTPA-2) has been synthesized and employed in FA0.85MA0.15PbI3 perovskite solar cells (PSCs) as the hole transporting material (HTM). The reference BTPA-1 containing thiophene bridge was also prepared for a comparative study. Compared to the thiophene unit in BTPA-1, the hexyloxy substituted BDT unit in BTPA-2 made the HOMO energy level lower. The more conjugated system with the BDT unit can improve the conductivity and hole mobility. The BTPA-1 and BTPA-2 based FA0.85MA0.15PbI3 PSCs showed the best power conversion efficiencies (PCE) of 12.76% and 13.97%, resp. Larger Voc and higher Jsc for the BTPA-2 based PSC were attributed to its reduced interfacial recombination and more conjugated system compared to the BTPA-1 based PSCs. More hydrophobic property of BTAP-2 made its PSC exhibit better environmental stability than BTPA-1. The results came from multiple reactions, including the reaction of 2,5-Dibromothiophene(cas: 3141-27-3Related Products of 3141-27-3)

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.Related Products of 3141-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Theoretical and photovoltaic investigations of 1,3,5-triazine-based photosensitizers achieving highly efficient DSSCs》 was written by Zhang, Hai; Zang, Xu-Feng; Hong, Yan-Ping; Chen, Zhen-E.. COA of Formula: C4H2Br2SThis research focused ontriazine based dye sensitized solar cell. The article conveys some information:

By establishing a new push-pull relationship, three novel metal-free organic sensitizers based on A′-π-A framework were synthesized, in which A′ and A represent the auxiliary acceptor (triazine) and the main acceptor (cyanoacrylic acid), resp., coded ZS03, ZS04, and ZS05. In this paper, the mol. structure, photophys. property, electrochem. property, theor. calculation, and photovoltaic property of these three sensitizers are described in detail. The results show that the addnl. acceptor and alkyl chains significantly affect the mol.′s energy level and spatial structure. In terms of photovoltaic characteristics, the ZS03-based device exhibits the best power conversion efficiency (PCE) of 7.11%, corresponding to a short-circuit photocurrent d. (Jsc) of 14.31 mA cm-2, an open-circuit voltage (Voc) of 708 mV, and a fill factor (FF) of 0.723, which is the highest efficiency among the known A′-π-A type dyes. It can be determined that the improvement of PCE is mainly due to the combination of the following two factors: the π-spacer with appropriate length and the alkyl chain with a reasonable layout. In the experimental materials used by the author, we found 2,5-Dibromothiophene(cas: 3141-27-3COA of Formula: C4H2Br2S)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene polymerizes by debromination with magnesium catalyzed by nickel compounds to form poly(2,5- thienylene) .COA of Formula: C4H2Br2S

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary