Author: Jessica.F

Bielefeld, Jens published the artcileHydroaminoalkylation of Allenes, Related Products of bromides-buliding-blocks, the publication is Synlett (2019), 30(8), 967-971, database is CAplus.

The first examples of early-transition-metal-catalyzed hydroaminoalkylation reactions of allenes are reported. Initial studies performed with secondary aminoallenes led to the identification of a suitable titanium catalyst and revealed that under the reaction conditions, the initially formed hydroaminoalkylation products undergo an unexpected titanium-catalyzed rearrangement to form the thermodynamically more stable allylamines. The assumption that this rearrangement involves a reactive allylic cation intermediate provides a simple explanation of the fact that no successful early-transition-metal-catalyzed hydroaminoalkylations of allenes have previously been reported. As a result of the generation of the corresponding cation, the titanium-catalyzed intermol. hydroaminoalkylation of propa-1,2-diene unexpectedly gives an aminocyclopentane product formed by incorporation of two equivalent of propa-1,2-diene.

Synlett published new progress about 81216-14-0. 81216-14-0 belongs to bromides-buliding-blocks, auxiliary class Linker,PROTAC Linker, name is 7-Bromohept-1-yne, and the molecular formula is C7H11Br, Related Products of bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Stones, Duane published the artcileModular solid-phase synthetic approach to optimize structural and electronic properties of oligo-boronic acid receptors and sensors for the aqueous recognition of oligosaccharides, COA of Formula: C12H16BBrO2, the publication is Chemistry – A European Journal (2004), 10(1), 92-100, database is CAplus and MEDLINE.

This article describes the design and optimization of the first entirely modular, parallel solid-phase synthetic approach for the generation of well-defined polyamine oligo-boronic acid receptors and fluorescence sensors for complex oligosaccharides. The synthetic approach allows an effective building of the receptor polyamine backbone, followed by the controlled diversification of the amine benzylic side chains. This approach enabled the testing, in a modular fashion, of the effect of different aryl-boronic acid units substituted with un-encumbering para electron-withdrawing or electron-donating groups. The feasibility of this approach toward automated synthesis was also investigated with the assembly of a sub-library of receptors by means of the Irori MiniKan technol. Several sub-libraries of anthracene-capped sensors containing two or three aryl-boronic acids were synthesized, and their binding to a series of model disaccharides was examined in neutral aqueous media. The calculation of association constants by fluorescence titrations confirmed that subtle changes in the structures of the inter-amine spacers in the polyamine backbone can have a significant effect on the stability of the resulting complexes. Most importantly, this study led to the determination of the preferred electronic characteristics for the aryl-boronate units, and suggests that a new generation of receptors containing very electron-poor aryl-boronic acids could lead to a significant improvement of binding affinities.

Chemistry – A European Journal published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C7H5Br2F, COA of Formula: C12H16BBrO2.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Boyer, Joseph H. published the artcileNitrodibromoacetonitrile: an agent for bromination and for the formation of adducts formally derived from cyanonitrocarbene, SDS of cas: 594-81-0, the publication is Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) (1989), 1381-5, database is CAplus.

The reactions of nitrodibromoacetonitrile (NDBA) with alkenes, aromatic compounds, amines, and sulfides have been studied. Products were formally derived from bromine or nitrocyanocarbene except for bis(2-bromocyclohexyl)nitroacetonitrile, an adduct (2:1) obtained from cyclohexene and NDBA. 2,3-Dimethylbut-2-ene was converted into 3-cyano-4,4,5,5-tetramethyl-4,5-dihydroisoxazole 2-oxide and 2,3-dibromo-2,3-dimethylbutane. meso-1,2-Dibromo-1,2-diphenylethane was obtained from trans-stilbene. In a reaction catalyzed by copper, benzene and NDBA gave benzoyl cyanide. From anthracene, phenol, and cupric acetylacetonate, 9,10-dibromoanthracene, 4-bromophenol, and cupric bromoacetylacetonate were obtained, resp. Di-Me sulfide, tetrahydrothiophene, and triethylamine afforded the corresponding sulfonium and ammonium cyanomethylide derivatives and, with the latter, co-formation of triethylammonium bromide. Rationales for the reactions are discussed.

Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, SDS of cas: 594-81-0.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Yu, Wan-Ning published the artcileEffect of elimination on antifouling and pH-responsive properties of carboxybetaine materials, Application In Synthesis of 56970-78-6, the publication is Chemical Communications (Cambridge, United Kingdom) (2017), 53(65), 9143-9146, database is CAplus and MEDLINE.

Carboxybetaine (CB)-based zwitterionic materials have attracted considerable attention due to their dual antifouling and functionalizable properties. In this communication, the elimination effect on the antifouling and pH-responsive properties of CB materials was investigated. We synthesize β- and α-substituted Me CB materials to investigate the occurrence of elimination in the ethylene intercharge arm in a harsh basic solution This work provides mol. understanding of a structure-property relationship of the CB moiety for material development.

Chemical Communications (Cambridge, United Kingdom) published new progress about 56970-78-6. 56970-78-6 belongs to bromides-buliding-blocks, auxiliary class Bromide,Carboxylic acid,Aliphatic hydrocarbon chain,Inhibitor, name is 3-Bromo-2-methylpropanoic acid, and the molecular formula is C12H10FeO4, Application In Synthesis of 56970-78-6.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Isa Ziembowicz, Francieli published the artcileThermodynamics of aggregation and modulation of Rheo-Thermal properties of hydroxypropyl cellulose by imidazolium ionic liquids, Application of 1-Bromododecane, the publication is Journal of Molecular Liquids (2022), 119314, database is CAplus.

Mixtures based on cellulose derivatives/ionic liquids (ILs) are potential viscosity modifiers for enhanced oil recovery (EOR). This paper investigates the thermodn. of monocationic imidazolium ionic liquids (1-alkyl-3-methylimidazolium bromide, CnMIMBr) aggregation with hydroxypropyl cellulose (HPC) in the dilute regime and the modulation of its rheol. and thermal properties in the semi-dilute regime. The outcomes showed that binding occurs by hydrophobic interactions between the alkyl chain of ILs and hydroxypropyl group on HPC and by ion-dipole interactions, and it is driven by entropy. The addition of ILs produced a significant increase in the HPC solutions viscosity, which depends on the concentration and alkyl chain length of the ILs (n = 10, 12, 14, 16). Moreover, the presence of ILs produces an effect salt-in delaying the HPC phase separation These findings highlight the role of ILs on the rheol. and thermal properties of HPC, opening new possibilities for the design of new complex mixtures

Journal of Molecular Liquids published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C12H25Br, Application of 1-Bromododecane.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Truscott, Roger J. W. published the artcileTwo new sulfur-containing amino acids in man, Category: bromides-buliding-blocks, the publication is Biomedical Mass Spectrometry (1981), 8(3), 99-104, database is CAplus and MEDLINE.

Two unusual S-containing amino acids were isolated from the urine of a baby (of 1st cousin parents) who died with major phys. malformations and failure of growth and development. These acids were identified as (S)-(2-carboxypropyl)-cysteamine and -cysteine by mass spectral anal. and by synthesis. A recessively inherited error in valine metabolism at the level of methacrylyl-CoA hydratase, with conjugation of the methacrylic acid so formed with cysteine, is proposed as the origin of the compounds Possibly methacrylic acid or one of its derivatives caused the malformations in the baby.

Biomedical Mass Spectrometry published new progress about 56970-78-6. 56970-78-6 belongs to bromides-buliding-blocks, auxiliary class Bromide,Carboxylic acid,Aliphatic hydrocarbon chain,Inhibitor, name is 3-Bromo-2-methylpropanoic acid, and the molecular formula is C25H23NO4, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Makovetskaya, L. I. published the artcileIon-selective electrodes with anionic tenside function for detergent analysis, Quality Control of 518-67-2, the publication is Seifen, Oele, Fette, Wachse (1991), 117(15), 565-71, database is CAplus.

The electrochem. characteristics of dodecyl sulfate-, and dodecylbenzene sulfonate-selective electrodes with polymer membranes on the base of ion associations of anionic tensides and cetylpyridinium, tetrahexadecylphosphonium (I), giamin 1622, etonium, and dyes like methylene blue (II) and dimidium bromide (III) were studied. Calibration curves are presented. The most stable electrodes (1400-1500 measurements) were these of associations of anionic tensides with I and dyes (II and III) obeying the Nernst relation in a broad range of tenside concentration and pH (1-12). Results from potentiometric titrations of Na alkylbenzene sulfonates and Na alkyl sulfates with all investigated electrodes met the results from conventional 2-phase titrations

Seifen, Oele, Fette, Wachse published new progress about 518-67-2. 518-67-2 belongs to bromides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is Dimidium bromide, and the molecular formula is C20H18BrN3, Quality Control of 518-67-2.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Krylov, Ivan M. published the artcileAccess to Functionalized α-Trifluoromethyl-α-aminophosphonates via Intermolecular Ene-Yne Metathesis, Application of (4-Bromobut-1-yn-1-yl)trimethylsilane, the publication is Synlett (2014), 25(18), 2624-2628, database is CAplus.

An efficient approach to a new family of highly functionalized P analogs of α-trifluoromethyl-substituted phenylalanine and its homologues using ruthenium-catalyzed intermol. ene-yne metathesis as a key step of the reaction sequence has been developed. The method includes cross metathesis of α-alkynyl-α-trifluoromethyl-α-aminophosphonates with alkenes under catalysis by second-generation Grubbs carbene complex to afford the corresponding aminophosphonates with 1,3-diene backbone followed by one-pot Diels-Alder reaction-aromatization step.

Synlett published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, Application of (4-Bromobut-1-yn-1-yl)trimethylsilane.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Gunathilake, Samodha S. published the artcileSynthesis and characterization of novel semiconducting polymers containing pyrimidine, Safety of 2-Bromo-3-(2-ethylhexyl)thiophene, the publication is Polymer Chemistry (2013), 4(20), 5216-5219, database is CAplus.

The acidic Me protons of 4,6-dimethylpyrimidines can be easily deprotonated with a base to generate a resonance stabilized carbanion which can be used as a substrate for aldol condensation reactions. A series of novel conjugated polymers were synthesized by the aldol condensation reaction of 2-decyloxy-4,6-dimethylpyrimidine with various aromatic dialdehydes.

Polymer Chemistry published new progress about 303734-52-3. 303734-52-3 belongs to bromides-buliding-blocks, auxiliary class Thiophene,Bromide, name is 2-Bromo-3-(2-ethylhexyl)thiophene, and the molecular formula is C12H19BrS, Safety of 2-Bromo-3-(2-ethylhexyl)thiophene.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Mazzarella, Daniele published the artcilePhotochemical Organocatalytic Borylation of Alkyl Chlorides, Bromides, and Sulfonates, HPLC of Formula: 401-55-8, the publication is ACS Catalysis (2019), 9(7), 5876-5880, database is CAplus.

Reported herein is a photochem. strategy for the borylation of alkyl halides using bis(catecholato)diboron as the boron source. This method exploits the ability of a nucleophilic dithiocarbonyl anion organocatalyst to generate radicals via an S_N2-based photochem. catalytic mechanism, which is not reliant on the redox properties of the substrates. Therefore, it grants access to alkyl boronic esters from readily available but difficult-to-reduce electrophiles, including benzylic and allylic chlorides, bromides, and mesylates, which were inert to or unsuitable for previously reported metal-free borylation protocols.

ACS Catalysis published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is C4H6BrFO2, HPLC of Formula: 401-55-8.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary