Author: Jessica.F

Sun, Ze-Ying published the artcileTetrahydroxydiboron-Promoted Radical Addition of Alkynols, COA of Formula: C4H6BrFO2, the publication is Organic Letters (2020), 22(15), 6214-6219, database is CAplus and MEDLINE.

Tetrahydroxydiboron has previously been used as a borylation or reducing reagent in organic synthesis. Herein, we present a novel tetrahydroxydiboron-promoted radical addition of internal alkynes followed by intramol. oxidation of alc. through 1,5-hydrogen atom transfer. Preliminary mechanistic studies showed that the process might be initiated through N,N-dimethylformamide-assisted homolytic cleavage of tetrahydroxydiboron. This process provides a convenient synthesis of fluoroalkyl-substituted alkenes with a pendant aldehyde or ketone moiety.

Organic Letters 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 C6H10F3NO, COA of Formula: C4H6BrFO2.

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

Yuan, Hua published the artcileAntioxidant and Antibacterial Activities of Dodecyl Tannin Derivative Linked with 1,2,3-Triazole, Formula: C12H25Br, the publication is Chemistry & Biodiversity (2022), 19(1), e202100558, database is CAplus and MEDLINE.

Dodecyl tannin derivative linked with 1,2,3-triazole was prepared by the click reaction of dodecyl azide and alkynylated tannin. The structure of tannin derivative was identified by FT-IR spectrometer and elemental analyzer, and the surface activity, antioxidant activity and antimicrobial activity of tannin derivative were studied. The surface tension of tannin derivative was significantly reduced because of the introduction of long chain alkyl groups, and the lowest surface tension was 38.87 mN/m at 1.0 mg/mL. The tannin derivative had strong ability to scavenge 1,1-diphenyl-2-picrylhydrazyl radical, the scavenging rate could reach 89.08% at 0.25 mg/mL. The tannin derivative exhibited strong antibacterial activity against E. coli and S. aureus due to the increased fat-solubility of tannin derivative and the introduction of antibacterial triazole groups in mol. structure of tannin derivative, and the bacteriostatic ratios of tannin derivative against E. coli and S. aureus were 92.16% and 89.21% at 2.0 mg/mL, resp. The tannin derivative can be used as good candidates for antibacterial packaging or antioxidant supplements.

Chemistry & Biodiversity 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 C12H9NO, Formula: C12H25Br.

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

He, Yang published the artcileImidazolium Gemini ionic liquids for regulating facilely the swelling and dispersion of montmorillonite in water, SDS of cas: 143-15-7, the publication is Applied Clay Science (2022), 106457, database is CAplus.

The imidazolium Gemini ionic liquids (IL), with alkyl groups ranging from Bu to tetradecyl as tail chains and polyoxyethylene group as linker chain, were synthesized and used as novel efficient modifiers for flexibly controlling the swelling and dispersion of Na-montmorillonite (Na-Mt). The correlation between swelling behavior and structure of imidazolium Gemini IL was investigated. Too long or too short tail chains caused greater swelling, obtaining smaller particle size and reductive face-to-face stacking degree of layers. Based on the change of water contact angles, the increased stability of modified Mt in water indicated that the hydrophobicity of the tail chains played an important role in impeding the entry of water mols. into the interlayer. Zeta potential, Fourier transform IR spectra and XPS validated the cation exchange between imidazolium Gemini IL and Na⁺, and confirmed the adsorption site. The mol. arrangement and intercalation were determined through adsorption behavior, interlayer space of Mt and simulation of mol. size. The imidazolium Gemini IL covered the Mt layers in monolayer, finally taking lateral (short tail chains) or paraffin (long tail chains) arrangement. The investigation will provide useful guidance for modifying Mt to obtain desirable properties and broadening the practical application of Mt hybrids.

Applied Clay Science 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, SDS of cas: 143-15-7.

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

He, Yang published the artcileImidazolium Gemini ionic liquids for regulating facilely the swelling and dispersion of montmorillonite in water, Category: bromides-buliding-blocks, the publication is Applied Clay Science (2022), 106457, database is CAplus.

The imidazolium Gemini ionic liquids (IL), with alkyl groups ranging from Bu to tetradecyl as tail chains and polyoxyethylene group as linker chain, were synthesized and used as novel efficient modifiers for flexibly controlling the swelling and dispersion of Na-montmorillonite (Na-Mt). The correlation between swelling behavior and structure of imidazolium Gemini IL was investigated. Too long or too short tail chains caused greater swelling, obtaining smaller particle size and reductive face-to-face stacking degree of layers. Based on the change of water contact angles, the increased stability of modified Mt in water indicated that the hydrophobicity of the tail chains played an important role in impeding the entry of water mols. into the interlayer. Zeta potential, Fourier transform IR spectra and XPS validated the cation exchange between imidazolium Gemini IL and Na⁺, and confirmed the adsorption site. The mol. arrangement and intercalation were determined through adsorption behavior, interlayer space of Mt and simulation of mol. size. The imidazolium Gemini IL covered the Mt layers in monolayer, finally taking lateral (short tail chains) or paraffin (long tail chains) arrangement. The investigation will provide useful guidance for modifying Mt to obtain desirable properties and broadening the practical application of Mt hybrids.

Applied Clay Science published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C8H17Br, Category: bromides-buliding-blocks.

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

Wang, Ji-Quan published the artcileNovel radiosynthesis of PET HSV-tk gene reporter probes [¹⁸F]FHPG and [¹⁸F]FHBG employing dual Sep-Pak SPE techniques, Recommanded Product: 5-(2-Bromoethyl)-2,2-dimethyl-1,3-dioxane, the publication is Bioorganic & Medicinal Chemistry Letters (2003), 13(22), 3933-3938, database is CAplus and MEDLINE.

Positron emission tomog. (PET) herpes simplex virus thymidine kinase (HSV-tk) gene reporter probes 9-[(3-[¹⁸F]fluoro-1-hydroxy-2-propoxy)methyl]guanine ([¹⁸F]FHPG) [(I); X = O] and 9-(4-[¹⁸F]fluoro-3-hydroxymethylbutyl)guanine ([¹⁸F]FHBG) [I; X = CH₂] were prepared by nucleophilic substitution of the appropriate tosylated precursors with [¹⁸F]KF/Kryptofix 2.2.2 followed by a quick deprotection reaction and purification with a simplified dual Silica Sep-Pak solid-phase extraction (SPE) method in 15-30% radiochem. yield.

Bioorganic & Medicinal Chemistry Letters published new progress about 97845-58-4. 97845-58-4 belongs to bromides-buliding-blocks, auxiliary class Other Aliphatic Heterocyclic,Bromide, name is 5-(2-Bromoethyl)-2,2-dimethyl-1,3-dioxane, and the molecular formula is C8H6BrClO2, Recommanded Product: 5-(2-Bromoethyl)-2,2-dimethyl-1,3-dioxane.

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

Zhao, Xiaojuan published the artcileA supramolecular approach towards strong and tough polymer nanocomposite fibers, Quality Control of 1207448-58-5, the publication is RSC Advances (2018), 8(19), 10361-10366, database is CAplus and MEDLINE.

Polymer nanocomposite fibers are important one-dimensional nanomaterials that hold promising potential in a broad range of technol. applications. It is, however, challenging to organize advanced polymer nanocomposite fibers with sufficient mech. properties and flexibility. Here, we demonstrate that strong, tough and flexible polymer nanocomposite fibers can be approached by electrospinning of a supramol. ensemble of dissimilar and complementary components including flexible multiwalled carbon nanotubes (CNT), and stiff cellulose nanocrystals (CNC) in an aqueous poly(vinyl alc.) (PVA) system. CNT and CNC are bridged by a water-soluble aggregation-induced-emission (AIE) mol. that forms π-π stacking with CNT via its conjugated chains, and electrostatic attraction with CNC through its pos. charges leading to a soluble CNT-AIE-CNC ensemble, which further assembles with PVA through hydrogen bonds. A high level of ordering of the nanoscale building blocks combined with hydrogen bonding leads to a more efficient stress transfer path between the reinforcing unit and the polymer. The nanocomposite fiber mat is capable of selective detection of nitroarom. explosives.

RSC Advances published new progress about 1207448-58-5. 1207448-58-5 belongs to bromides-buliding-blocks, auxiliary class Bromide,Benzene,Phenol,Ether,Aldehyde, name is 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde, and the molecular formula is C8H17Br, Quality Control of 1207448-58-5.

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

Li, Ya-Wei published the artcile^tBuOK-Promoted Cyclization of Imines with Aryl Halides, Synthetic Route of 76283-09-5, the publication is Organic Letters (2020), 22(11), 4553-4556, database is CAplus and MEDLINE.

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.

Organic Letters published new progress about 76283-09-5. 76283-09-5 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzyl bromide,Benzene, name is 4-Bromo-1-(bromomethyl)-2-fluorobenzene, and the molecular formula is C7H5Br2F, Synthetic Route of 76283-09-5.

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

Sergienko, S. R. published the artcileTransformations of diene compounds in the presence of oxide catalysts. Transformations of 2,3-dimethyl-1,3-butadiene on aluminosilicate, Safety of 2,3-Dibromo-2,3-dimethylbutane, the publication is Doklady Akademii Nauk SSSR (1953), 803-6, database is CAplus.

cf. C.A. 48, 11290g. Passage of 2,3-dimethyl-1,3-butadiene over pelleted aluminosilicate at 250° (at 200° little reaction takes place, while above 250° much decomposition occurs) gave 7-10% C₅-hydrocarbons and 35-40% dimeric products, the remainder being trimers and higher condensation products. The identified products were 2,3-dimethyl-2-butene, 2,3-dimethylbutane, apparently cyclic dimers, b. 187-95°, and higher products. The fresh catalyst is gradually coated not with C but with a hydrocarbon C_nH_2n-18, a resinous solid, the composition of which was between a pentamer and a hexamer of the diene.

Doklady Akademii Nauk SSSR 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 C3H8N2S, Safety of 2,3-Dibromo-2,3-dimethylbutane.

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

Ponomarev, I. I. published the artcileSynthesis of N-(2-hydroxyphenyl)-1,8-naphthalimide and its derivatization at the hydroxy group, Product Details of C3H6BrNaO3S, the publication is Russian Chemical Bulletin (2011), 60(3), 512-520, database is CAplus.

The reaction of 1,8-naphthalic anhydride with 2-aminophenol afforded N-(2-hydroxyphenyl)-1,8-naphthalimide. N-(2-hydroxyphenyl)-1,8-naphthalimide was alkylated at the hydroxyl group and then subjected to [2+3]-cycloaddition with azides to afford 1,2,3-triazoles, e.g., I.

Russian Chemical Bulletin published new progress about 55788-44-8. 55788-44-8 belongs to bromides-buliding-blocks, auxiliary class Bromide,Salt,Aliphatic hydrocarbon chain,Aliphatic hydrocarbon chain, name is Sodium 3-bromopropane-1-sulfonate, and the molecular formula is C3H6BrNaO3S, Product Details of C3H6BrNaO3S.

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

Li, Lixin published the artcileSynthesis of remote fluoroalkylated alkenes by a palladium-catalyzed relay Heck-type reaction, SDS of cas: 401-55-8, the publication is Chemical Communications (Cambridge, United Kingdom) (2020), 56(65), 9384-9387, database is CAplus and MEDLINE.

Palladium-catalyzed relay Heck-type reaction of fluoroalkyl bromide and terminal alkenes was reported. The reaction involved fluoroalkylation of alkenes and migration of double bonds via a 1,5-hydrogen atom transfer strategy. Through this method, a series of remote fluoroalkylated alkenes was obtained under mild conditions.

Chemical Communications (Cambridge, United Kingdom) 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, SDS of cas: 401-55-8.

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