Category: bromides-buliding-blocks

Iridium-Catalyzed Borylation of Secondary Benzylic C-H Bonds Directed by a Hydrosilane was written by Cho, Seung Hwan;Hartwig, John F.. And the article was included in Journal of the American Chemical Society in 2013.Product Details of 61150-57-0 This article mentions the following:

Most functionalizations of C-H bonds by main-group reagents occur at aryl or Me groups. The authors describe a highly regioselective borylation of secondary benzylic C-H bonds catalyzed by an Ir precursor and 3,4,7,8-tetramethyl-1,10-phenanthroline as the ligand. The reaction is directed to the benzylic position by a hydrosilyl substituent. This hydrosilyl directing group is readily deprotected or transformed to other functional groups after the borylation reaction, providing access to a diverse set of secondary benzylboronate esters by C-H borylation chem. In the experiment, the researchers used many compounds, for example, 2-Bromo-4-fluorobenzylbromide (cas: 61150-57-0Product Details of 61150-57-0).

2-Bromo-4-fluorobenzylbromide (cas: 61150-57-0) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Product Details of 61150-57-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Mixed monolayers of amphiphilic cyclodextrins and phospholipids. I. Miscibility under dynamic conditions of compression was written by Kasselouri, Athena;Coleman, Anthony William;Baszkin, Adam. And the article was included in Journal of Colloid and Interface Science in 1996.Quality Control of Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin This article mentions the following:

The miscibility of per-(6-amino-2,3-di-O-hexyl) β-CD hydrochloride salt (NH₃-β-CD-OC6) with 1,2-dipalmitoyl,3-sn-phosphatidyl choline (DPPC) and 1,2 dipalmitoyl,3-sn-phosphatidic acid (DPPA) and of per-(6-dodecanoylamino-6-deoxy) β-CD (C₁₁CONH-β-CD) with DPPC was assessed by surface pressure-area experiments under dynamic conditions. The determination of their mixing behavior was approached by thermodn. characterization derived from a comparison of the composition dependence of collapse pressure for various contents of 2 components in monolayers with that predicted from a model of ideal mixing. Component miscibility has addnl. been addressed by the use of the J. Smaby-H. Brockman (1992) state equation for liquid-expanded monolayers which characterizes interaction between monolayer components by using the H₂O activity coefficient While for both NH₃-β-CD-OC6-DPPC and NH₃-β-CD-OC6-DPPA systems, the average surface areas followed the additivity rule, for the latter system, surface pressures at collapse deviated significantly from ideality. The occurrence of an interaction at the level of oppositely charged polar groups of NH₃-β-CD-OC6 and DPPA was also demonstrated by the nonideal composition dependence of the H₂O activity coefficient (f₁) characterizing the interfacial H₂O. The mixing energies and interaction parameters at collapse pressures were calculated by using the P. Joos et al. (1969) approach. Pos. values of these factors indicate that NH₃-β-CD-OC6 and DPPA mixed films are less stable thermodynamically than are films in which ideal mixing of components occurs. The mixing of NH₃-β-CD-OC6 with DPPC appears to be almost ideal. In the case of the C₁₁CONH-β-CD-DPPC system, anal. according to both the Joos and F. Goodrich (1957) approaches shows the occurrence of an important interaction which results in neg. mixing energies characteristic of thermodynamically stable mixed films. In the experiment, the researchers used many compounds, for example, Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin (cas: 53784-83-1Quality Control of Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin).

Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin (cas: 53784-83-1) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Quality Control of Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

A modular synthesis of teraryl-based α-helix mimetics, part 4: Core fragments with two halide leaving groups featuring side chains of proteinogenic amino acids was written by Trobe, Melanie;Blesl, Julia;Vareka, Martin;Schreiner, Till;Breinbauer, Rolf. And the article was included in European Journal of Organic Chemistry in 2022.Related Products of 128-08-5 This article mentions the following:

Teraryl-based α-helix mimetics have proven to be useful compounds for the inhibition of protein-protein interactions (PPI). We have developed a modular and flexible approach for the synthesis of teraryl-based α-helix mimetics using a benzene core unit featuring two halide leaving groups of differentiated reactivity in the Pd-catalyzed cross-coupling used for teraryl assembly. The use of para-bromo iodoarene core fragments resolved the issue of hydrolysis during cross-coupling that was observed when using triflate as a leaving group. We report a complete set of para-bromoiodoarene core fragments decorated with side chains of all proteinogenic amino acids relevant for PPI (Ala, Arg, Asn, Asp, Cys, Gln, Glu, His, Ile, Leu, Lys, Met, Phe, Ser, Thr, Trp, Tyr and Val). In order to be compatible with general cross-coupling conditions, some of the nucleophilic side chains had to be provided in a protected form to serve as stable building blocks. 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. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Related Products of 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Nickel-Catalyzed Reductive Alkylation of Heteroaryl Imines was written by Turro, Raymond F.;Brandstatter, Marco;Reisman, Sarah E.. And the article was included in Angewandte Chemie, International Edition in 2022.Computed Properties of C9H11Br This article mentions the following:

The preparation of heterobenzylic amines, e.g., I [R¹ = H, 4-Cl, 5-F, 6-Me, etc.; R² = i-Pr, n-Bu, t-Bu, cyclopropyl, cyclobutyl, (R)-PhCHMe; R³ = H, Me, R⁴ = PhCH₂; R³ = H, R⁴ = 4-ClC₆H₄CH₂, 2,6-Me₂C₆H₃CH₂, etc.; R³R⁴ = (CH₂)₂X(CH₂)₂; X = CH₂, O, CO, NBoc], by a Ni-catalyzed reductive cross-coupling between heteroaryl imines, e.g., II, and C(sp³) electrophiles R³R⁴CHX¹ (X¹ = Cl, Br, I, phthalimidyloxycarbonyl) is reported. This umpolung-type alkylation proceeds under mild conditions, avoids the pre-generation of organometallic reagents, and exhibits good functional group tolerance. Mechanistic studies are consistent with the imine substrate acting as a redox-active ligand upon coordination to a low-valent Ni center. The resulting bis(2-imino)heterocycle·Ni complexes can engage in alkylation reactions with a variety of C(sp³) electrophiles, giving heterobenzylic amine products in good yields. In the experiment, the researchers used many compounds, for example, 2-(Bromomethyl)-1,3-dimethylbenzene (cas: 83902-02-7Computed Properties of C9H11Br).

2-(Bromomethyl)-1,3-dimethylbenzene (cas: 83902-02-7) 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.Computed Properties of C9H11Br

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Determination of aromaticity indices of thiophene and furan by nuclear magnetic resonance spectroscopic analysis of their phenyl esters was written by Lee, Chang Kiu;Yu, Ji Sook;Lee, Hye-Jin. And the article was included in Journal of Heterocyclic Chemistry in 2002.Computed Properties of C8H7BrO2 This article mentions the following:

A series of m- and p-substituted Ph benzoates, 2-thienoates, and 2-furoates were prepared and their ¹H and ¹³C NMR spectroscopic characteristics were examined In general, good correlations were observed between the chem. shift values of protons and carbons of the acyl aromatic rings and the Hammett σ. Plots of the chem. shift values of the carbonyl carbons of the benzoates against those of the 2-thienoates and 2-furoates gave an excellent correlation and the values of the slopes are 0.85 and 0.75, resp., in DMSO-d₆ and 0.90 and 0.78, resp., in chloroform-d. The values could be considered as a set of aromaticity indexes. In the experiment, the researchers used many compounds, for example, 3-Bromophenyl acetate (cas: 35065-86-2Computed Properties of C8H7BrO2).

3-Bromophenyl acetate (cas: 35065-86-2) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. Computed Properties of C8H7BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Adamantane-based block poly(arylene ether sulfone)s as anion exchange membranes was written by Wang, Zhen;Zhou, Shu Feng;Zhuo, Yi Zhi;Lai, Ao Nan;Lu, You Zhong;Wu, Xiao Bin. And the article was included in Polymer in 2022.Formula: C4H4BrNO2 This article mentions the following:

Current anion exchange membranes (AEMs) for fuel cells suffer from low ionic conductivity and poor mech. property. Herein, we introduce adamantane groups onto the block poly(arylene ether sulfone)s backbone to form the selected comb-shaped structure. The structure-property relationships of the AEMs are investigated by varying the ratio of the hydrophobic to hydrophilic segments. The bulk rigid adamantane group can restrain the swelling of the AEMs thus enhancing the mech. properties and expand the spacing between the hydrophilic/hydrophobic segments of the polymer chains to promote the formation of microphase separation morphol. Consequently, as characterized by at. force microscope (AFM) and transmission electron microscopy (TEM), the resulting membranes show well-defined microphase separation between the hydrophilic/hydrophobic segments, resulting in high ionic conductivity range from 27.4 to 90.2 mS cm^-1 over a temperature range of 30-80°C. At the same time, the membranes present ultralow swelling ratio with the levels from 1.6% to 6.1% at 30°C and from 6.8% to 12.7% at 80°C, resp., and thus excellent mech. properties with the tensile strength as high as 11.52 MPa and elongation at break of 29.28%. The excellent comprehensive properties grant the prepared AEMs bright future for fuel cells. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Formula: C4H4BrNO2).

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. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Formula: C4H4BrNO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Chemoselective Rearrangement Reactions of Sulfur Ylide Derived from Diazoquinones and Allyl/Propargyl Sulfides was written by Yan, Sijia;Rao, Junxin;Zhou, Cong-Ying. And the article was included in Organic Letters in 2020.COA of Formula: C6H6BrNO This article mentions the following:

Here, we describe three types of rearrangement reactions of sulfur ylide derived from diazoquinones and allyl/propargyl sulfides. With Rh₂(esp)₂ as the catalyst, diazoquinones react with allyl/propargyl sulfides to form a sulfur ylide, which undergoes a chemoselective tautomerization/[2,3]-sigmatropic rearrangement reaction, a Doyle-Kirmse rearrangement/Cope rearrangement cascade reaction, or a Doyle-Kirmse rearrangement/elimination reaction, depending on the substituent of the sulfides. The protocol provides alkenyl and allenyl sulfides and multisubstituted phenols with moderate and high yields. Safety: caution advised in preparation, storage and use of diazoquinones. In the experiment, the researchers used many compounds, for example, 4-Amino-3-bromophenol (cas: 74440-80-5COA of Formula: C6H6BrNO).

4-Amino-3-bromophenol (cas: 74440-80-5) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.COA of Formula: C6H6BrNO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis of 6-bromo-6-deoxy-β-cyclodextrin from its silyl and tosyl derivatives was written by Sipin, S. V.;Grachev, M. K.;Vasyanina, L. K.;Nifant’ev, E. E.. And the article was included in Russian Journal of General Chemistry in 2006.Recommanded Product: 53784-83-1 This article mentions the following:

Easily available per-6-O-(tert-butyl-dimethyl-silyl)-β-cyclodextrin and per-6-O-tosyl-β-cyclodextrin containing free secondary hydroxy groups, under the treatment with 10 mol equivalent of dibromotriphenylphosphorane readily undergo desilylation or detosylation with the formation of per-6-bromo-6-deoxy-p-cyclodextrin. In the experiment, the researchers used many compounds, for example, Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin (cas: 53784-83-1Recommanded Product: 53784-83-1).

Heptakis(6-Bromo-6-Deoxy)-β-Cyclodextrin (cas: 53784-83-1) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Recommanded Product: 53784-83-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis of UK-78282 was written by Liang, Xizhou;Da, Shijun;Li, Ying. And the article was included in Zhongguo Yiyao Gongye Zazhi in 2005.Related Products of 57293-19-3 This article mentions the following:

UK-78282 [i.e., 4-[(diphenylmethoxy)methyl]-1-[3-(4-methoxyphenyl)propyl]piperidine] a novel potassium channel blocker (no data), was synthesized from 4-methoxycinnamic acid by reduction and bromination to give 3-(4-methoxyphenyl)-1-bromopropane, which subjected to condensation with Et piperidine-4-carboxylate followed by reduction and etherification by diphenylmethanol. The overall yield was 58%. In the experiment, the researchers used many compounds, for example, 1-(3-Bromopropyl)-4-methoxybenzene (cas: 57293-19-3Related Products of 57293-19-3).

1-(3-Bromopropyl)-4-methoxybenzene (cas: 57293-19-3) 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. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Related Products of 57293-19-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

New donor-acceptor benzotrithiophene-containing conjugated polymers for solar cells was written by Keshtov, M. L.;Kuklin, S. A.;Kochurov, V. S.;Konstantinov, I. O.;Krayushkin, M. M.;Radychev, N. A.;Khokhlov, A. R.. And the article was included in Doklady Chemistry in 2014.Recommanded Product: 5-Bromothiophene-3-carbaldehyde This article mentions the following:

This paper new donor-acceptor benzotrithiophene-containing conjugated polymers for solar cells. The large BTT structure is planar and leads to an effective intermol. package in the solid state. In this work, we have designed a new BTT containing monomer as a promising ‘building block’ and used it in synthesis of four new BTT containing narrow gap donor-acceptor conjugated polymers as an electroactive material for solar cells. In the experiment, the researchers used many compounds, for example, 5-Bromothiophene-3-carbaldehyde (cas: 18791-79-2Recommanded Product: 5-Bromothiophene-3-carbaldehyde).

5-Bromothiophene-3-carbaldehyde (cas: 18791-79-2) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. Recommanded Product: 5-Bromothiophene-3-carbaldehyde

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary