Tag: M.W=200-250

Liu, Zui published the artcileManipulated and Improved Photoinduced Deformation Property of Photoresponsive Liquid Crystal Elastomers by Copolymerization, Category: bromides-buliding-blocks, the publication is Macromolecular Rapid Communications (2022), 43(6), 2100717, database is CAplus and MEDLINE.

Photoresponsive liquid crystal elastomers (LCEs) have aroused much attention due to their unique structures, properties, and potential applications. However, many reported photoresponsive LCEs show small photoinduced deformation with a slow deformation speed, which limits their application to a certain extent. In this article, multiple hydrogen bond component and biphenyl component was introduced into photoresponsive LCEs bearing cyanostilbene by copolymerization, and prepared a series of LCEs CSm-BPn (CS and BP means cyanostilbene and biphenyl component, resp.; m, n means the content ratio of CS and BP). All uniaxially oriented CSm-BPn fibers show photoinduced deformation behavior under 365 nm UV light except for CS0-BP5. The introduction of hydrogen bond and the decrease of glass transition temperature realize large deformation and fast deformation speed. Besides, the properties of LCEs are successfully regulated by changing the content ratio of each component. What’s more interesting is that the addition of appropriate amount of biphenyl can significantly improve and manipulate the deformation property of the CSm-BPn fibers. The maximum bending angle can reach 175°, and the whole photoinduced deformation process only takes 11 s. The photoresponsive LCEs with such large bending angle and fast deformation rate are rarely reported.

Macromolecular Rapid Communications 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

Mishra, Anamika published the artcileSynthesis and properties of 3,4-dioxythiophene and 1,4-dialkoxybenzene based copolymers via direct C-H arylation: Dopant-free hole transport material for perovskite solar cells, Quality Control of 143-15-7, the publication is Journal of Polymer Science (Hoboken, NJ, United States) (2022), 60(6), 975-984, database is CAplus.

Direct C-H arylation coupling reaction has gained significant importance in synthesis of conjugated polymers for organic electronic applications. We report here a facile and straightforward method called “direct C-H arylation” reaction to synthesize conjugated 3,4-dioxythiophene and 1,4-dialkoxybenzene based copolymers as hole transport material (HTM) for perovskite solar cells. Two electron-rich conjugated polymers P1-2 were synthesized, in which 1,4-dibromo-2,5-bis(dodecyloxy)benzene and 3,4-dialkoxy-thiophene units were used for polymerization The resulting polymers were characterized and exhibited high solubility in organic solvents. Electrochem. and optical characterizations were carried out by cyclic voltammetry and UV-Vis-NIR absorption spectroscopy and found that these polymers show higher-lying HOMO energy levels with wide band gap. D. functional theory calculation was performed on these polymers (P 1-2) and correlated with our exptl. results. Finally, perovskite solar cells were fabricated by solution-processable deposition of P1-2 as dopant-free HTM with device geometry ITO/SnO₂/Perovskite/HTM(P1/P2)/Ag and achieved a maximum power conversion efficiency of 5.28%. This study provides information on designing and simple preparation by direct C-H arylation reaction of higher-lying HOMO energy level polymer as HTM for perovskite solar cells.

Journal of Polymer Science (Hoboken, NJ, United States) 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, Quality Control of 143-15-7.

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

Altona, C. published the artcileConformation of open-chain compounds. III. Carbon-halogen stretching frequencies and conformation of some vicinal dihalides, Computed Properties of 594-81-0, the publication is Recueil des Travaux Chimiques des Pays-Bas (1969), 88(1), 33-42, database is CAplus.

Hal = halogen throughout. A study of the ir and Raman spectra of some vicinal dihaloethanes, propanes and butanes with predominant antiperiplanar orientation in the straight chain and branched series, reveals that the 2 C-Hal stretching frequencies occur characteristically as a more or less strongly coupled pair: an intense Raman band (νs) and a strong ir active mode of vibration (νas) at lower frequency. The C-Hal frequencies of the gauche conformations are weakly coupled. The position of the bands and the difference Δν = νs – νas are functions of the chem./geometrical structure in the vicinity of the C-Hal bonds. Empirical rules are presented by which the C-Hal frequencies or, in strongly coupled systems, the average frequency of anti as well as of gauche forms can be predicted with fair accuracy.

Recueil des Travaux Chimiques des Pays-Bas 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, Computed Properties of 594-81-0.

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

Altona, Cornelis published the artcileConformation of open chain compounds. II. Dipole moments and conformational equilibrium of some vicinal dibromides, the benzene effect, Category: bromides-buliding-blocks, the publication is Recueil des Travaux Chimiques des Pays-Bas (1968), 87(3), 279-88, database is CAplus.

The dipole moments of 6 title compounds such as CH2BrCH2Br and Me3CHBrCH2Br, were measured in CCl4 and C6H6. The gauche Br….Br interaction energy was solvent dependent; its value was 380 ± 30 cal./mole lower in C6H6 than in CCl4.

Recueil des Travaux Chimiques des Pays-Bas 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, Category: bromides-buliding-blocks.

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

Kuznetsov, L. L. published the artcileEffect of structure on the basicity of aromatic amines, Name: 4-Bromo-N-methyl-2-nitroaniline, the publication is Zhurnal Organicheskoi Khimii (1982), 18(4), 685-92, database is CAplus.

The basicities (pK_BH⁺) of N-unsubstituted, N-monosubstituted, and N,N-disubstituted anilines were linearly correlated with σ^– constants The invariability of the protonation mechanism of the strongly and weakly basic anilines was demonstrated.

Zhurnal Organicheskoi Khimii published new progress about 53484-26-7. 53484-26-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Nitro Compound,Amine,Benzene, name is 4-Bromo-N-methyl-2-nitroaniline, and the molecular formula is C7H7BrN2O2, Name: 4-Bromo-N-methyl-2-nitroaniline.

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

Yakubovich, A. Ya. published the artcileSynthesis of heteroörganic compounds of the aliphatic series by the diazo method. II. Synthesis of compounds of group V elements-organophosphorus compounds, Synthetic Route of 66197-72-6, the publication is Zhurnal Obshchei Khimii (1952), 1534-42, database is CAplus.

cf. C.A. 47, 8010c; Staudinger and Meyer, C.A. 14, 536. At low temperature CH₂N₂ (I) and other diazoalkanes react satisfactorily with PX₃. PCl₃ (200 g.) in 200 ml. dry Et₂O was treated with stirring and cooling to -70° with 25 g. I in 750 ml. Et₂O which had been dried by freezing 3 hrs. at -70° over solid KOH, and the mixture kept at -55 to -65°; the energetic reaction led to rapid evolution of N (14 l.) and the formation of a colorless precipitate The mixture was allowed to rise gradually to room temperature overnight and the products from 5 such runs were filtered without access of moisture and combined, giving a total of 32 g. product which is hydrolyzed by moisture; it is an organophosphorus compound soluble in H₂O and ROH, but insoluble in CHCl₃ or C₆H₆; it can not be recrystallized without decomposition Distillation of the filtrate yielded several fractions up to b₁₄₀ 78°. Redistillation gave: 4.8 g. MeOPCl₂ b. 91-2° (uncorrected), b. 94-5° (corrected), d₂₀²⁰ 1.3995, n_D²⁰ 1.4750 (this substance is believed to arise from partial hydrolysis of the PCl₃ by moisture in the reagents; the resulting HOPCl₂ can then be alkylated by I); 31.3 g. POCl₃ (this was apparently introduced as an impurity in the PCl₃, as shown by rectification of the PCl₃ starting material); and some 40% (175 g.) ClCH₂P Cl₂ (II), b₁₄₀ 80-1°(corrected), d₂₀²⁰ 1.5289, n_D²⁰ 1.5247; II fumes in air because of hydrolysis by moisture. II (5 g.) in 5 ml. CCl₄ treated at 0-5° with 2.5 g. Cl in 10 ml. CCl₄ yielded a white precipitate; the solvent removed below 35° in vacuo without access of moisture and filtered and washed with cold CCl₄ yielded 5.5 g. ClCH₂PCl₄, decompose 102-4° (sealed tube), deliquescent in air. Passing 3.7 g. NO₂ over 30 min. into 10 g. II in CCl₄ at 0° to -5° until the NO₂ was no longer decolorized and a reddish color appears owing to the formation of resinous products, blowing with a stream of dry air, and immediately distilling gave 7 g. (60%) ClCH₂POCl₂, b₃₀ 103°, d₂₀²⁰ 1.6444, n_D²⁰ 1.4945 (IV). III from 10 g. II treated in the cold with dry SO₂ in CCl₄ gave 8.5 g. (80%) IV, b₈₀ 102-3°, b₂ 63°. Adding 2 g. IV gradually to 10 ml. H₂O and letting the solution stand over P₂O₅ in vacuo 7 days gave 100% ClCH₂PO(OH)₂ (V), needles, m. 92° (from C₆H₆MeNO₂), very hygroscopic, does not lose MeCl on heating with alkalies; Ag salt, soluble in H₂O. V (0.5 g.) in C₆H₆ with excess PhNH₂ (2 ml.) let stand 2 days gave 100% ClCH₂PO(OH)₂-PhNH₂, needles, decompose 183° (from EtOH). To 8.3 g. IV in 10 ml. Et₂O at 0-5° was added 2.8 g. Na in 55 ml. absolute EtOH until the solution was neutral to Congo red; filtration and distillation gave ClCH₂PO(OEt)₂, b_2.5 86-7° , d₂₀²⁰ 1.1909, n_D²⁰ 1.4360. To l90g. PCl₃in 200 ml. dry Et₂O at -70° was added 30 g. MeCHN₂ in 800 ml. Et₂O in N atm.; after treatment as above the combined products of 4 runs gave distillate b. up to b₅₀ 62.5°, and a little material b₇ 70°; redistillation gave some 52 g. POCl₃, b. 107-9° (corrected); some 22 g. EtOPCl₂, b₁₀₀ 51-2°, b. 117-18° (corrected), d₂₀²⁰ 1.3300, n_D²⁰ 1.4640 [the impure product was further identified by treatment with EtOH in Et₂O in presence of Et₂NPh, yielding (EtO)₃P, b₁₂ 49°, n_D²⁰ 1.41-30]; and some 100 g. (35%) MeCHClPCl₂ (VI), b₅₀ 61.5-2.5° (uncorrected), b₅₀ 63.5-4.5° (corrected), d₂₀²⁰ 1.4232, n_D²⁰ 1.5090, which fumes in air and a piece of cotton moistened with it ignites on exposure to air. VI (5 g.) chlorinated at -5° in CCl₄ as above gave a colorless precipitate, which, worked up as above yielded MeCHClPCl₄, very hygroscopic crystals. To 16.5 g. VI in 15 ml. CCl₄ was added with ice-NaCl cooling 7.5 g. Cl in 50 ml. CCl₄ and the mixture treated directly with dry SO₂ until the precipitate dissolved and 10 min. longer; distillation gave 90-5% MeCHClPOCl₂ (VII), b₈ 70°, d₂₀²⁰ 1.5424, n_D²⁰ 1.4930. VII (2 g.) hydrolyzed with 3 ml. H₂O and evaporated in vacuo gave 100% MeCHClPO(OH)₂, needles, m. 99-100° (from C₆H₆-MeNO₂); Ag salt, soluble in H₂O. Adding 5 g. PhNH₂ to 2 g. VII in C₆H₆, letting the mixture stand overnight, gave, after filtering off the PhNH₂.HCl, washing the filtrate with acidified H₂O, evaporating, dissolving the residue in EtOH, and diluting with H₂O gave ClCH₂PO(NHPh)₂, m. 154-5° (from dilute EtOH). To 3 g. absolute EtOH and 9 g. Et₂NPh in 50 ml. dry Et₂O was added dropwise 5.4 g. VII in Et₂O with ice cooling, and the mixture filtered after 24 hrs., and distilled, yielding 3.5 g. MeCHClPO(OEt)₂, b₅ 93°, b₇ 96°, d₂₀²⁰ 1.1474, n_D²⁰ 1.4370. A solution of 100 g. BuNH₂ in 300 ml. H₂O at -5° was acidified to methyl red with HCl, treated with 400 g. H₂O and 250 g. CO(NH₂)₂, refluxed 3 hrs., cooled, treated with 120 g. NaNO₂ in 300 g. H₂O, and added slowly to 95 g. H₂SO₄ and 600 g. crushed ice with cooling to -5° to 5°; the precipitate of nitrosobutylurea floats and can be readily separated and dried below 10°. This (100 g.) added gradually at -5° to 500 ml. Et₂O and 200 ml. 70% KOH gave 25 g. PrCHN₂ (estimated by treatment with BzOH) in the red Et₂O layer. To 70 g. PCl₃ in 100 ml. dry Et₂O was added with Dry Ice-Me₂CO cooling 22 g. PrCHN₂ in 450 ml. Et₂O (dried as above), and the mixture distilled yielding 7 g. BuOPCl₂, b. 155-7° (decomposition), b₃₀ 63-4.5°, d₂₀ 1.1661, and 10.5 g. PrCHClPOCl₂, (VIII), b₂₅ 84°, d₂₀²⁰ 1.3236, n_D²⁰ 1.5010. VIII apparently was formed by oxidation during handling of the primary product, PrCHClPCl₂. To 52.7 g. PBr₃ in 50 ml. Et₂O was added at -50° 2.72 g. I in 150 ml. Et₂O (dried by freezing), the mixture was warmed to room temperature, filtered (an amorphous precipitate forms in the reaction), and distilled, yielding after several distillations 9.5 g. (50% based on I) BrCH₂PBr₂ (IX), b₄ 70°, d₂₀²⁰ 2.6357. At PBr₃/I ratios of 2:1 and 1:1 there is a sharp increase of the amount of the precipitate formed and the yield of IX declines to 15-20%. The precipitate hydrolyzes in air, evolving Br; its solubility and characteristics are similar to those of the product formed with PCl₃. Passing 4.9 g. dry NO₂ 25 min. into 17 g. IX in 50 ml. CCl₄ at 5-10° and letting the solution stand 0.5 hrs. at room temperature gave 10.8 g. BrCH₂POBr₂, b₇ 118-20°, b₂ 112-13°, d₂₀²⁰ 2.7030, n_D²⁰ 1.5120 (X), which energetically reacts with Hg, forming undistillable products. To 10.8 g. X in 40 ml. Et₂O were added with ice cooling 20 ml. Et₂O and 3.4 g. absolute EtOH, then 10.3 g. Et₂NPh in 50 ml. Et₂O and the mixture was allowed to stand overnight at room temperature; filtration and distillation gave 50% BrCH₂PO(OEt)₂, b₁ 99°, d₂₀²⁰ 1.4474, n_D²⁰ 1.4585. Hydrolyzing 2 g. X with 3 ml. H₂O and drying the product over P₂O₅, gave the extremely hygroscopic free acid, which had to be isolated as the mono-PhNH₂ salt by treatment in C₆H₆ with excess PhNH₂; PhNH₂ salt, needles, m. 187° (decomposition; from EtOH containing 1% PhNH₂). To 120 g. POCl₃ in 50 ml. Et₂O was slowly added at -30° 13-14 g. dry CH₂N₂ in 400 ml. Et₂O in the presence of 1 g. CuSO₄ (2 addnl. 0.5-g. portions were added in the course of the experiment); after the evolution of N had subsided the temperature was raised to room temperature and the products of 3 runs distilled together, yielding but 6 g. of product, b₁₂ 59.5°, identified as MeOPOCl₂. Similarly, 15.5 g. POCl₃ and 8.5 g. MeCHN₂ gave 2.5 g. EtOPOCl₂, b. 163-5°; these products were probably produced by alkylation of HOPOCl₂ formed from partial hydrolysis of POCl₃ in handling. To 10 g. PCl₅ in 40 ml. dry Et₂O was added at -40° 6 g. I in 200 ml. Et₂O (dried by freezing as above); after the N evolution had ceased the cooling bath was removed, the mixture allowed to stand overnight, and the liquid portion decanted from a precipitate and evaporated (the precipitate is also extracted with dry Et₂O and the extract evaporated along with the main solution), forming some 6-7 g. needles, m. 100.5° (from petr. ether), which did not contain any Cl hydrolyzable under the usual conditions. The product was identified as (ClCH₂)₃PO (cf. Hoffmann, C.A. 24, 3986, who described this oxide as the hemihydrate, m. 88-9°). Similar reaction of 10 g. PCl₅ with 14-15 g. MeCHN₂ at -40° to -50°, followed by standing overnight at room temperature, gave on evaporation 10 g. viscous liquid, containing hydrolyzable Cl; the product could not be distilled without decomposition, but a fraction, b₅ 55-115° (4.5 g.) hydrolyzed with 5 ml. hot H₂O and let stand 2-3 days, then extracted with Et₂O, and the dried extract evaporated gave 1.5 g. needles, m. 107° (from C₆H₆-petr. ether), identified as (MeCHCl)₂PO(OH), moderately soluble in H₂O, and very soluble in EtOH; Ag salt, soluble in H₂O. To 2 g. of this acid was added 3 ml. PhNH₂ in C₆H₆ yielding the PhNH₂ salt, 100%, needles, decompose 160°. Reactions of RCHXPX₂ with RCHN₂ lead to complex solids and not to secondary or tertiary derivatives

Zhurnal Obshchei Khimii published new progress about 66197-72-6. 66197-72-6 belongs to bromides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyl (bromomethyl)phosphonate, and the molecular formula is C14H17BClNO2, Synthetic Route of 66197-72-6.

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

Yakubovich, A. Ya. published the artcileSynthesis of hereto-organic compounds of the aliphatic series by means of the diazo derivatives. Syntheses of compounds of group V elements, Related Products of bromides-buliding-blocks, the publication is Doklady Akademii Nauk SSSR (1950), 303-5, database is CAplus.

Chlorides of the type MCl₃ (As, Sb, and Bi) react with diazoalkanes, RCHN₂, yielding progressively RCHClMCl₂, (RCHCl)₂MCl, and (RCHCl)₃M at 0-5°; the extent of reaction is somewhat controlled by the reagent ratios used; over-all yields of 30-50% are attained. The reactions with PCl₃ and PBr₃ at low temperatures (-50° to -60°) are analogous and yield (average) 40% of the corresponding dihalophosphines. Reactions of dihalophosphines with diazoalkanes or the reactions of PX₃ at higher temperatures yield solid organophosphorus compounds of more complex nature. POCl₃ and POBr₃ do not react with diazoalkanes, but PCl₅ reacts easily, forming di- and trisubstitution products. The necessary diazo compounds were prepared in Et₂O or C₆H₆ and were dried by freezing at -70° over solid KOH, followed by standing over Na wire; these were added to the desired halide in Et₂O or C₆H₆ with stirring and when N evolution ceased and the color was discharged the products were distilled The following were obtained: (MeCHCl)₂AsCl, b₁ 51.5°, d₂₀²⁰ 1.553, n_D²⁰ 1.5870. (MeCHCl)₃As, b₂ 81-2°, d₄²⁰ 1.445, n_D²⁵ 1.5307. ClCH₂BiO (the chloride originally formed hydrolyzes under the conditions used), easily decomposed, with explosive violence at times. ClCH₂SbCl₂, m. 36-8°, b₂ 86.5°, d₂₀²⁰ 2.677. (ClCH₂)₃Sb, b₃ 105°, d₂₀²⁰ 2.038. (ClCH₂)₃SbBr₂, m. 90-90.5°. (MeCHCl)₂SbCl, b₁ 69.5°, d₂₀²⁰ 1.831. (MeCHCl)₂SbO(OH), does not m. 190°. ClCH₂PCl₂, b₁₄₀ 80°, d₂₀²⁰ 1.5289, n_D²⁰ 1.5247. MeCHClPCl₂, b₃₀ 64°, d₂₀²⁰ 1.4232, n_D²⁰ 1.5090. ClCH₂PCl₄, decompose 102-4°, is readily chlorinated to Cl₃CPCl₄, which with water yields stable Cl₃CPO(OH)Cl, m. 79°; hydrolysis of Cl₃CPO(OMe)₂ or the di-Et analog with HCl in sealed tube yields Cl₃CPO(OH)₂.H₂O. m. 87°, also obtainable by hydrolysis of the above semichloride. MeCHClPCl₄ decompose at an unstated temperature ClCH₂POCl₂ b₃₀ 103°, d₂₀²⁰ 1.6444, n_D²⁰ 1.4945. MeCHClPOCl₂ b₈ 70°, d₂₀²⁰ 1.5424, n_D²⁰ 1.4930. PrCHClPOCl₂ b₂₅ 84°, d₂₀²⁰ 1.3236, n_D²⁰ 1.5010. ClCH₂PO(OH)₂ m. 92°; its (monoaniline salt), decompose 183°. MeCHClPO(OH)₂ m. 100°. ClCH₂PO(OEt)₂ b₃ 86°, d₂₀²⁰ 1.1909, n_D²⁰ 1.4360. MeCHClPO(OEt)₂ b₅ 93°, d₂₀²⁰ 1.1474, n_D²⁰ 1.4370. MeCHClPO(NHPh)₂ m. 154-5°. BrCH₂PBr₂ b₄ 70°, d₂₀²⁰ 2.6357. BrCH₂POBr₂ m. 38°, b₂ 112°, d₂₀²⁰ 2.7030, n_D²⁰ 1.6120. BrCH₂PO(OH)₂.PhNH₂ decompose 187°. BrCH₂PO(OEt)₂ b₁ 99°, d₂₀²⁰ 1.4474, n_D²⁰ 1.4587. (ClCH₂)₃PO m. 100.5° (hydrate, m. 88-9°; cf. Hoffman, C.A. 24, 3986). (Cl₃C)₃P(OH)Cl, decompose 203°, solid. (MeCHCl)₂PO(OH) m. 107°; monoaniline salt, decompose 160°. (Cl₃C)₃PO m. 53°.

Doklady Akademii Nauk SSSR published new progress about 66197-72-6. 66197-72-6 belongs to bromides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyl (bromomethyl)phosphonate, and the molecular formula is C15H20BNO3, Related Products of bromides-buliding-blocks.

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

Duda, Addison M. published the artcileIntramolecular Oxidative Diaryl Coupling of Tetrasubstituted Diphenylamines for the Preparation of Bis(trifluoromethyl) Dimethyl Carbazoles, Formula: C8H6BrF3, the publication is SynOpen (2021), 5(4), 308-313, database is CAplus.

Presented herein is a method for the preparation of carbazoles I (R¹ = Me, trifluoromethyl; R² = Me, trifluoromethyl; R³ = Me, trifluoromethyl; R⁴ = Me, trifluoromethyl) with the use of inexpensive and reliable hypervalent iodine chem. An oxidative single-electron-transfer (SET) event initiates cyclization for the preparation of trifluoromethyl carbazoles I. This method has been shown to be useful for a variety of bis(trifluoromethyl)carbazole isomers I that are of primary interest for use as battery materials.

SynOpen published new progress about 261952-20-9. 261952-20-9 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,Benzene, name is 2-Bromo-5-methylbenzotrifluoride, and the molecular formula is C8H6BrF3, Formula: C8H6BrF3.

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

Eseola, Abiodun Omokehinde published the artcileImportance of monodentate mono-ligand designs in developing N-stabilized palladium catalysts for efficient ambient temperature C-C coupling: Donor strengths and steric features, Synthetic Route of 89694-44-0, the publication is Molecular Catalysis (2019), 110398, database is CAplus.

Unfriendly temperature profiles and costs of carbon coupling catalysis, which pose challenge to both synthetic organic chemists as well as industrial applicability, motivated our design of new monodentate N-donors as support ligands for the purpose of constructing ambient temperature precatalysts that are molecularly close to the hypothetical active forms. Therefore, a series of sterically varied monodentate N-donor imidazoles (1-7) and oxazoles (8-9) have been synthesized and their N-donor strengths, which were estimated as pK_as, are systematically varied from 0.9 to 8.5 by substituent variations. Eleven target mono-ligand complexes (1-PdCl₂MeCN – 9-PdCl₂MeCN, 6-PdCl₂PhCN and 7-PdCl₂PhCN) and six trans-bis-ligand complexes (1₂-PdCl₂, 2₂-PdCl₂, 3₂-PdCl₂, 6₂-PdCl₂, 1₂-Pd(OAc)₂ and 2₂-Pd(OAc)₂) were isolated and catalytically studied along with PdI₂(PPh₃)₂. Results of coupling reactions, which were conducted both via in situ ‘Pd(II) salt + ligand’ approach and by use of the precatalysts, show that the mono-ligand precatalyst designs (1-PdCl₂MeCN – 9-PdCl₂MeCN, 6-PdCl₂PhCN and 7-PdCl₂PhCN) represent a true catalyst improvement initiative among the phosphine-free catalyst community; i.e. yields approaching 100% (TOF ≈ 2000) at 0.2 mol % catalyst loading, 45°C and within 15 min. On the other hand, the complexes with trans-bis-ligand coordination were inactive at ambient temperatures Therefore, it was concluded that coordinative saturation, which results from implementing two or more ligand equivalent or use of polydentate ligands on palladium, should be strongly discouraged. Such saturation necessitates the undesirable and avoidable high temperature necessities, long reflux durations and needlessly high catalyst loadings. Correlation between catalyst activity and donor strengths or steric properties were analyzed leading to important conclusions. The catalyst design also supported coupling of activated aryl chlorides from 60°C while Heck coupling activities were observed only at the early minutes of reactions.

Molecular Catalysis published new progress about 89694-44-0. 89694-44-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic acid and ester, name is 2-Bromo-5-methoxybenzene boronic acid, and the molecular formula is C7H8BBrO3, Synthetic Route of 89694-44-0.

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

Fortuna, Andreia published the artcileSynthesis and Exploitation of the Biological Profile of Novel Guanidino Xylofuranose Derivatives, Name: 1-Bromododecane, the publication is ChemMedChem (2022), 17(14), e202200180, database is CAplus and MEDLINE.

The synthesis and biol. evaluation of novel guanidino sugars as iso-nucleoside analogs is described. 5-Guanidino xylofuranoses containing 3-O-saturated/unsaturated hydrocarbon or aromatic-containing moieties were accessed from 5-azido xylofuranoses via reduction followed by guanidinylation with N,N’-bis(tert-butoxycarbonyl)-N”-triflylguanidine. Mols. comprising novel types of iso-nucleosidic structures including 5-guanidino 3-O-methyl-branched N-benzyltriazole iso-nucleosides and a guanidinomethyltriazole 3′-O-dodecyl xylofuranos-5′-yl iso-nucleoside were accessed. The guanidinomethyl triazole derivative and a 3-O-dodecyl (N-Boc)guanidino xylofuranose were revealed as selective inhibitors of acetylcholinesterase (K_i=22.87 and 7.49μM, resp.). The latter also showed moderate antiproliferative effects in chronic myeloid leukemia (K562) and breast cancer (MCF-7) cells. An aminomethyltriazole 5′-iso-nucleoside was the most potent mol. with low micromolar GI₅₀ values in both cells (GI₅₀=6.33μM, 8.45μM), similar to that of the drug 5-fluorouracil in MCF-7 cells. Moreover, the most bioactive compounds showed low toxicity in human fibroblasts, further indicating their interest as promising lead mols.

ChemMedChem 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, Name: 1-Bromododecane.

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