Month: November 2022

Tucker, Joseph W. published the artcileTin-free radical cyclization reactions initiated by visible light photoredox catalysis, HPLC of Formula: 69361-41-7, the publication is Chemical Communications (Cambridge, United Kingdom) (2010), 46(27), 4985-4987, database is CAplus and MEDLINE.

Herein, we report an advancement in the application of visible light photoredox catalysts in a classic free radical mediated reaction, cyclization onto unactivated π-systems. The reactive radical intermediate is generated by the single electron reduction of an activated C-Br bond by an electron-rich redox catalyst afforded by a visible light induced catalytic cycle.

Chemical Communications (Cambridge, United Kingdom) 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 C15H12O6, HPLC of Formula: 69361-41-7.

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

Jones, Seamus D. published the artcileDesign of Polymeric Zwitterionic Solid Electrolytes with Superionic Lithium Transport, Application In Synthesis of 55788-44-8, the publication is ACS Central Science (2022), 8(2), 169-175, database is CAplus and MEDLINE.

Progress toward durable and energy-dense lithium-ion batteries has been hindered by instabilities at electrolyte-electrode interfaces, leading to poor cycling stability, and by safety concerns associated with energy-dense lithium metal anodes. Solid polymeric electrolytes (SPEs) can help mitigate these issues; however, the SPE conductivity is limited by sluggish polymer segmental dynamics. We overcome this limitation via zwitterionic SPEs that self-assemble into superionically conductive domains, permitting decoupling of ion motion and polymer segmental rearrangement. Although crystalline domains are conventionally detrimental to ion conduction in SPEs, we demonstrate that semicrystalline polymer electrolytes with labile ion-ion interactions and tailored ion sizes exhibit excellent lithium conductivity (1.6 mS/cm) and selectivity (t₊ ≈ 0.6-0.8). This new design paradigm for SPEs allows for simultaneous optimization of previously orthogonal properties, including conductivity, Li selectivity, mechanics, and processability.

ACS Central Science 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, Application In Synthesis of 55788-44-8.

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

Ryden, Andreas published the artcileSynthesis and tentative identification of novel polybrominated diphenyl ether metabolites in human blood, Name: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, the publication is Chemosphere (2012), 88(10), 1227-1234, database is CAplus and MEDLINE.

Hydroxylated polybrominated di-Ph ethers (OH-PDBEs) are exogenous, bioactive compounds that originate, to a large extent, from anthropogenic activities, although they are also naturally produced in the environment. In the present study nine new authentic OH-PBDE reference standards and their corresponding Me ether derivatives (MeO-PBDEs) were synthesized and characterized by NMR spectroscopy and mass spectrometry. Seven of the authentic reference standards prepared were thereafter tentatively identified in a pooled human blood sample. The tentatively identified OH-PBDEs were 3-hydroxy-2,2′,4,4′,6-pentabromodiphenyl ether, 3′-hydroxy-2,2′,4,4′,6-pentabromodiphenyl ether, 3-hydroxy-2,2′,4,4′,5-pentabromodiphenyl ether, 3-hydroxy-2,2′,4,4′,5,6′-hexabromodiphenyl ether, 3′-hydroxy-2,2′,4,4′,5,6′-hexabromodiphenyl ether, 3-hydroxy-2,2′,4,4′,5,5′-hexabromodiphenyl ether and 4-hydroxy-2,2′,3,4′,5,5′,6-heptabromodiphenyl ether. An addnl. seven OH-PBDEs were tentatively identified in the pooled human blood sample, of which one OH-PBDE, 4′-hydroxy-2,2′,4,5,5′-pentabromodiphenyl ether, has not been identified in human blood before. The identification was performed using gas chromatog.-mass spectrometry (GC-MS) recording the bromine ions m/z 79, 81. The tentative identification was supported by the peaks relative retention times (RRTs) compared to authentic references on two GC columns of different polarities for the hexa-, and heptabrominated OH-PBDEs, and three different GC columns for the pentabrominated OH-PBDEs. The OH-PBDE congeners most likely originate from human metabolism of a flame retardant, i.e. polybrominated di-Ph ethers (PBDEs), due to the relatively high concentrations of PBDEs in the same human blood sample and the fact that these PBDEs could form the tentatively identified OH-PBDEs via metabolic direct hydroxylation or via 1,2-shift.

Chemosphere published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Name: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide.

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

Deyab, M. A. published the artcileFour novel imidazolium-derived ionic liquids: Synthesis and anti-corrosion characteristics, Category: bromides-buliding-blocks, the publication is Journal of Molecular Liquids (2022), 118984, database is CAplus.

This paper described the corrosion inhibiting action of four new imidazolium-derived ionic liquids (ILs) I [X = H, Me, Cl, NO₂]. Elements anal., IR, TGA, ¹H-¹³C NMR, XRD and HSQC-NMR were used to confirm the mol. formula of ILs. The corrosion suppressive effectiveness was calculated using loss of mass and electrochem. experiments and ranged from 53 to 96%. Their adsorption on a steel substrate was precisely characterized using the Langmuir isotherm. Gibbs free energies vary from – 35.24 kJ mol^-1 to – 41.82 kJ mol^-1, indicating that ILs were adsorbing via physi-chemisorption scenario. SEM/EDX and FTIR were used to validate the process of adsorption of ionic liquids

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, Category: bromides-buliding-blocks.

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

Deyab, M. A. published the artcileTheoretical and experimental investigation of four ionic liquids for their ability to prevent carbon steel corrosion in 1 M HCl, Recommanded Product: 1-Bromooctane, the publication is Journal of Molecular Liquids (2022), 118414, database is CAplus.

The inhibitory mechanism of four ionic liquids (ILs) generated from imidazolium is reported in this study. The goal of the research was to see how the cation structure of ILs affected the corrosion inhibition of carbon steel in 1 M HCl. The chem. structure of ILs was verified by elements anal., Fourier-transform-IR (FTIR), thermo gravimetric (TGA), NMR (¹HNMR, D₂O, ¹³C NMR) and hetero-nuclear single-quantum correlation (HSQC). The inhibitory efficiency was measured using mass loss and electrochem. tests and varied from 62.5% to 97.2%. The Langmuir model accurately defined their adsorption on a steel substrate. Adsorption of novel ILs on steel substrates is a mixed physisorption and chemisorption method. To ensure the mechanism of adsorption of current ionic liquids, FTIR and UV spectra were employed.

Journal of Molecular Liquids 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, Recommanded Product: 1-Bromooctane.

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

Turunen, Lotta published the artcileHalogen Bonds of Iodonium Ions: A World Dissimilar to Silver Coordination, Synthetic Route of 52358-73-3, the publication is Bulletin of the Chemical Society of Japan (2021), 94(1), 191-196, database is CAplus.

A distinct difference between the three-center halogen bond and the analogous three-center coordinative bond of silver is demonstrated by computational, X-ray crystallog. and solution NMR spectroscopic investigations of their complexes with a bidentate Lewis base. Iodine(I) preferentially forms an entropically favored monomeric complex, whereas silver(I) forms enthalpically favored dimeric complexes. Counterion coordination considerably influences the structure of the silver complexes in the solution and solid state, whereas it does not have notable effect on the analogous halogen bond.

Bulletin of the Chemical Society of Japan published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C6H20Cl2N4, Synthetic Route of 52358-73-3.

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

Tan, Ze published the artcileSelective Synthesis of Epolactaene Featuring Efficient Construction of Methyl (Z)-2-Iodo-2-butenoate and (2R,3S,4S)-2-Trimethylsilyl-2,3-epoxy-4-methyl-γ-butyrolactone, COA of Formula: C7H13BrSi, the publication is Organic Letters (2006), 8(13), 2783-2785, database is CAplus and MEDLINE.

(+)-Epolactaene (I) was synthesized in 14 steps in the longest linear sequence. The synthesis was highlighted by a highly efficient preparation of the lactone intermediate II, which only required three steps from the com. available (S)-3-butyn-2-ol. It also featured a fully stereocontrolled synthesis of the intermediate (2E,3E,5E,9E)-2-ethylidene-4,10-dimethyl-11-oxo-3,5,9-undecatrienoic acid Me ester, which was constructed through the use of Zr-catalyzed methylalumination of alkynes and a series of Pd-catalyzed organozinc cross-coupling reactions, such as homopropargylation, direct ethynylation, and alkenylation of (Z)-α-iodocrotonic acid Me ester.

Organic Letters 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 C5H5NO3S, COA of Formula: C7H13BrSi.

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

Miller, Joseph A. published the artcileControlled carbometalation. 17. Cyclic carboalumination of alkynylsilanes forming exocyclic alkenes, Application of (4-Bromobut-1-yn-1-yl)trimethylsilane, the publication is Israel Journal of Chemistry (1984), 24(2), 76-81, database is CAplus.

The reaction of Me₃SiCC(CH₂)_nCH:CH₂ (I; n = 2, 3) with 1.1 equivalent and catalytic Cp₂ZrCl₂ (Cp = cyclopentadienyl) in ClCH₂CH₂Cl or CH₂Cl₂ at room temperature gave methylenecycloalkanes II (R = H, n = 2, 3) in 72-85% yield after hydrolysis, and iodinolysis gave 68% II (R = iodo, n = 2). However, I (n = 1, 4) did not cyclize under the same conditions. Whereas Al(CH₂CHMe₂)₃-Cp₂ZrCl₂ cyclization of Me₃SiCCCHR¹CH₂CH:CH₂ III; (R¹ = Me) gave 1:1 methylenecyclopentanes (Z)-IV and (E)-V, using Cp₂ZrI₂ rather than Cp₂ZrCl₂, or using Al(CH₂CHMe₂)₃-Al(CH₂CHMe₂)₂OMe-Cp₂ZrCl₂, gave 20:80 IV–V. The reaction of III (R¹ = OH) with Al(CH₂CHMe₂)₃-Cp₂ZrCl₂ under kinetic conditions gave 82% product containing 90% IV whereas under thermal equilibration 74% product containing 97% V was formed.

Israel Journal of Chemistry 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

Chatterjee, Sugata published the artcileMetal-promoted cyclization. VI. Palladium-catalyzed cyclization via intramolecular allylation of alkenylmetals, Recommanded Product: (4-Bromobut-1-yn-1-yl)trimethylsilane, the publication is Journal of Organometallic Chemistry (1985), 285(1-3), C1-C4, database is CAplus.

R₃SiCCCH₂CH₂CH(OH)CH:CR¹R² (I; R = Me, R¹, R² = H, Me; R = Et, R¹ = R² = H) were treated sequentially with Me₃Al, (Me₂CHCH₂)AlH (II) ZnCl₂, and Pd(PPh₃)₄ to give the silyl(vinyl)cyclopentenes III in 52-55% (for R = Me) or 75% (R = Et) yield. Similar treatment of Me₃SiCC(CH₂)₂CH:CHCH₂OH also gave III (R = Me, R¹ = R² = H), in ∼40% yield. Interruption of the sequence after treatment with II, followed by quenching with iodine, gave Z and E-Me₃SiCI:CH(CH₂)₂CH(OH)CH:CH₂ as a 70-30 mixture, starting from I (R = Me, R¹ = R² = H). However, attempted cyclization of Me₃SiCC(CH₂)_nCH(OH)CH:CH₂ (n = 1,3), to give 4- or 6-membered monocyclic products, did not occur.

Journal of Organometallic Chemistry 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, Recommanded Product: (4-Bromobut-1-yn-1-yl)trimethylsilane.

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

Worayuthakarn, Rattana published the artcileSynthesis of benzoindoloquinolizines via a Cu(I)-mediated C-N bond formation, Formula: C30H24BrCuN2P, the publication is Tetrahedron (2012), 68(13), 2864-2875, database is CAplus.

An effective synthesis of the multi ring-fused benzoindoloquinolizines has been accomplished by Cu(I)-mediated and MW-assisted C-N_amide bond formation of benzo[a]quinolizin-4-ones. The deamination of tetrahydro-2H-pyrido[2,1-a]isoquinolines was also studied and was found to give benzoquinolizines. The benzo[a]quinolizin-4-ones were prepared based on the annulations of C-1 substituted 3,4-dihydroisoquinolines and azlactones.

Tetrahedron published new progress about 25753-84-8. 25753-84-8 belongs to bromides-buliding-blocks, auxiliary class Copper, name is Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), and the molecular formula is C39H35N5O8, Formula: C30H24BrCuN2P.

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