Author: Jessica.F

Hartrampf, Felix W. W. published the artcileA Conia-Ene-Type Cyclization under Basic Conditions Enables an Efficient Synthesis of (-)-Lycoposerramine R, COA of Formula: C7H13BrSi, the publication is Angewandte Chemie, International Edition (2017), 56(3), 893-896, database is CAplus and MEDLINE.

An enantioselective total synthesis of the Lycopodium alkaloid lycoposerramine R (I) is presented. It relies on a base-mediated cyclization that resembles the Conia-ene reaction of ynones and gold-catalyzed variants thereof. Thus, hydrindanones and other functionalized ring systems bearing an exocyclic alkene can be rapidly accessed at room temperature without noble metal catalysis or substrate preactivation.

Angewandte Chemie, International Edition 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, COA of Formula: C7H13BrSi.

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

Armstrong, W. W. Jr. published the artcileExperimental control of lime-induced iron chlorosis in trifoliate orange seedlings by soil applications of some iron compounds, HPLC of Formula: 1997-80-4, the publication is J. Rio Grande Valley Hort. Soc. (1956), 43-8, database is CAplus.

cf. Cooper and Peynado, C.A. 49, 7793b. Trifoliate orange (Poncirus trifoliata) seedlings were used as indicator plants in an experiment to determine the effectiveness of several Fe compounds in the treatment of citrus in high-lime soils for lime-induced Fe chlorosis. Soil applications of ground FeSO₄ (I), Fe ethylenediaminetetraacetic acid (II), and Fe N-hydroxyethylethylenediaminetriacetic acid (EDTA) (III) were very effective in preventing chlorosis, while unchelated EDTA was much less effective and Fe-rich fritted glass had no apparent effect. The higher the rate of application of I or II, the more effective was the treatment. Only III exhibited toxicity, a dose equivalent to 0.5 g. Fe/sq. ft. causing wilting and death of the plants.

J. Rio Grande Valley Hort. Soc. published new progress about 1997-80-4. 1997-80-4 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,Benzene, name is 1-(2-Bromoethyl)-3-(trifluoromethyl)benzene, and the molecular formula is C9H8BrF3, HPLC of Formula: 1997-80-4.

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

Evans, Genevieve L. published the artcileAnthranilate phosphoribosyltransferase: Binding determinants for 5′-phospho-alpha-D-ribosyl-1′-pyrophosphate (PRPP) and the implications for inhibitor design, Synthetic Route of 66197-72-6, the publication is Biochimica et Biophysica Acta, Proteins and Proteomics (2018), 1866(2), 264-274, database is CAplus and MEDLINE.

Phosphoribosyltransferases (PRTs) bind 5′-phospho-α-D-ribosyl-1′-pyrophosphate (PRPP) and transfer its phosphoribosyl group (PRib) to specific nucleophiles. Anthranilate PRT (AnPRT) is a promiscuous PRT that can phosphoribosylate both anthranilate and alternative substrates, and is the only example of a type III PRT. Comparison of the PRPP binding mode in type I, II and III PRTs indicates that AnPRT does not bind PRPP, or nearby metals, in the same conformation as other PRTs. A structure with a stereoisomer of PRPP bound to AnPRT from Mycobacterium tuberculosis (Mtb) suggests a catalytic or post-catalytic state that links PRib movement to metal movement. Crystal structures of Mtb-AnPRT in complex with PRPP and with varying occupancies of the two metal binding sites, complemented by activity assay data, indicate that this type III PRT binds a single metal-coordinated species of PRPP, while an adjacent second metal site can be occupied due to a sep. binding event. A series of compounds were synthesized that included a phosphonate group to probe PRPP binding site. Compounds containing a “bianthranilate”-like moiety are inhibitors with IC₅₀ values of 10-60 μM, and K_i values of 1.3-15 μM. Structures of Mtb-AnPRT in complex with these compounds indicate that their phosphonate moieties are unable to mimic the binding modes of the PRib or pyrophosphate moieties of PRPP. The AnPRT structures presented herein indicated that PRPP binds a surface cleft and becomes enclosed due to re-positioning of two mobile loops.

Biochimica et Biophysica Acta, Proteins and Proteomics 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 C5H12BrO3P, Synthetic Route of 66197-72-6.

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

Miura, Shotaro published the artcileRapid and efficient synthesis of a novel cholinergic muscarinic M₁ receptor positive allosteric modulator using flash chemistry, Product Details of C7H7BrFN, the publication is Organic & Biomolecular Chemistry (2019), 17(35), 8166-8174, database is CAplus and MEDLINE.

Continuous flow-flash synthesis of a 2-bromobenzaldehyde derivative as a key intermediate of a novel cholinergic muscarinic M₁ pos. allosteric modulator I bearing an isoindolin-1-one ring system as a pharmacophore was achieved using flow microreactors through selective I/Li exchange of 1-bromo-2-iodobenzene derivative with BuLi and subsequent formylation at -40° of the highly reactive 2-bromophenyllithium intermediate using DMF, which was difficult to achieve by a conventional batch process due to the conversion of the highly reactive 2-bromophenyllithium intermediate into benzyne even at -78°. Late-stage cyclization gave the isoindolin-1-one ring system, through reductive amination of 2-bromobenzaldehyde derivative followed by palladium-catalyzed carbonylation with carbon monoxide and intramol. cyclization, efficiently afforded I for its further research and development.

Organic & Biomolecular Chemistry published new progress about 1540204-53-2. 1540204-53-2 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Amine,Benzene, name is 4-Bromo-2-fluoro-3-methylaniline, and the molecular formula is C7H7BrFN, Product Details of C7H7BrFN.

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

Yamato, Takehiko published the artcileMedium-sized cyclophanes. Part 57. Synthesis, conformations and stereodynamics of [2.n]metacyclophan-1-enes and their conversion to [2.n]metacyclophan-1-ynes, Application In Synthesis of 111865-47-5, the publication is New Journal of Chemistry (2001), 25(5), 728-736, database is CAplus.

Anti- and syn-[2.8]Metacyclophan-1-enes I, which are both conformationally rigid structures, were prepared in good yields by a McMurry cyclization of 1,8-bis(5-tert-butyl-3-formyl-2-methoxyphenyl)octane. Similarly, McMurry cyclization of 1,10-bis(5-tert-butyl-2-methoxy-3-formylphenyl)decane afforded (E)- and (Z)-[2.10]-metacyclophan-1-enes II in good yields. The assignment of the E and Z structures was confirmed by ¹H-NMR analyses and single crystal X-ray diffraction studies. Bromination of (E)- and (Z)-II with benzyltrimethyl- ammonium tribromide affords exclusively the cis-adduct to the bridged double bond. When treated with potassium tert-butoxide in refluxing tert-BuOH at 80°C for 3 h, the bromine meso adduct gave the dehydrobrominated product [2.10]metacyclophan-1-yne in 93% yield, along with a 1-bromo[2.10]metacyclophan-1-ene in 7% yield; the same reaction with the dl-bromine adduct from II gave 29% of [2.10]metacyclophan-1-yne along with 71% of the 1-bromo[2.10]metacyclophan-1-ene. Similarly, anti- and syn-[2.8]metacyclophan-1-ynes were also prepared by bromination of syn-[2.n]metacyclophan-1-ene syn-I, followed by the dehydrobromination of the bromine adduct. The characterization and the reaction pathway of these products are discussed. The dynamics of the ring inversion and UV spectra are also presented.

New Journal of Chemistry 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 C5H8N2O, Application In Synthesis of 111865-47-5.

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

Lerch, Swantje published the artcileThe Mizoroki-Heck Reaction in Tunable Aryl Alkyl Ionic Liquids, HPLC of Formula: 143-15-7, the publication is European Journal of Organic Chemistry (2022), 2022(6), e202200008, database is CAplus.

Authors report the use of imidazolium based tunable aryl alkyl ionic liquids (TAAILs) as solvents in the Mizoroki-Heck reaction. Different com. available palladium sources, inorganic bases, TAAILs and reaction conditions were tested for the synthesis of trans-stilbene using bromobenzene and styrene. A variety of different stilbene derivatives were synthesized with exclusive formation of the (E)-isomers and isolated yields up to 97%. Author’s were able to optimize the reaction conditions using only 0.25 mol% of Pd(OAc)₂ as the catalyst and a reaction time of 4 h. No addnl. ligands or additives are used in the reaction. The catalytic system using TAAILs achieved higher yields than com. available imidazolium and phosphonium ionic liquids, demonstrating the potential of tailored ionic liquids as a reaction medium for the Mizoroki-Heck reaction.

European Journal of Organic Chemistry 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, HPLC of Formula: 143-15-7.

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

Lerch, Swantje published the artcileThe Mizoroki-Heck Reaction in Tunable Aryl Alkyl Ionic Liquids, Application of 1-Bromooctane, the publication is European Journal of Organic Chemistry (2022), 2022(6), e202200008, database is CAplus.

Authors report the use of imidazolium based tunable aryl alkyl ionic liquids (TAAILs) as solvents in the Mizoroki-Heck reaction. Different com. available palladium sources, inorganic bases, TAAILs and reaction conditions were tested for the synthesis of trans-stilbene using bromobenzene and styrene. A variety of different stilbene derivatives were synthesized with exclusive formation of the (E)-isomers and isolated yields up to 97%. Author’s were able to optimize the reaction conditions using only 0.25 mol% of Pd(OAc)₂ as the catalyst and a reaction time of 4 h. No addnl. ligands or additives are used in the reaction. The catalytic system using TAAILs achieved higher yields than com. available imidazolium and phosphonium ionic liquids, demonstrating the potential of tailored ionic liquids as a reaction medium for the Mizoroki-Heck reaction.

European Journal of Organic Chemistry 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, Application of 1-Bromooctane.

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

Kiprianov, G. I. published the artcileSynthesis of some derivatives of β-phenylisopropylamine. I. Reaction of symmetric dihaloalkanes with β-phenylisopropylamine, COA of Formula: C6H12Br2, the publication is Ukrains’kii Khemichnii Zhurnal (1950), 16(No. 6), 620-6, database is CAplus.

Heating 5 g. (CH₂Br)₂ with 35 g. PhCH₂CHMeNH₂ (I) 5 hrs. at 130° gave 7.4 g. (CH₂NHCHMeCH₂Ph)₂, b₃ 195-200°; di-HCl salt, m. 272-4°. Heating 37.5 g. I with 17 g. (CMe₂Br)₂ 6 hrs. on a steam bath gave 5.6 g. PhCH₂CHMeNHCMe₂CMe:CH₂, b₇ 135-43°; HCl salt, m. 173-4°; the free amine with Br yields a product m. 120-1°. Heating 67.5 g. I with 12 g. 1,2-dibromocyclohexane 7 hrs. at 100° and 4 hrs. at 120° gave 7.2 g. N-(1-(or 2-)cyclohexen-1-yl)-2-phenylisopropylamine, b₃ 130-5°; HCl salt, m. 186-9°. (CH₂)₃Br₂ (10.1 g.) and 67.5 g. I kept 24 hrs. at room temperature gave 10 g. 1,3-bis(2-phenylisopropylamino)propane, b₂ 200-5°; di-HCl salt, m. 238-9°. Similarly (CH₂)₄Br₂ gave 94% 1-(2-phenylisopropyl)pyrrolidine, b₄ 117-23°; HCl salt, m. 136-8°. (CH₂)₅Br₂ gave 62% 1-(2-phenylisopropyl)piperidine, b₄ 115-17°; HCl salt, m. 215-16°. (CH₂)₆Br₂ and I kept 24 hrs. at room temperature gave 58% 1,6-bis(2-phenylisopropylamino)hexane, b₂ 224°; picrate, m. 183-4°; di-HCl salt m. 253-4°.

Ukrains’kii Khemichnii Zhurnal 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, COA of Formula: C6H12Br2.

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

Wiechmann, Sascha published the artcileSydnone anions and abnormal N-heterocyclic carbenes of O-ethylsydnones. Characterizations, calculations and catalyses, Category: bromides-buliding-blocks, the publication is Chemical Communications (Cambridge, United Kingdom) (2014), 50(80), 11822-11824, database is CAplus and MEDLINE.

Deprotonated sydnones, which can be represented as anionic N-heterocyclic carbenes, were prepared as Li adducts and compared with deprotonated O-ethylsydnones (5-ethoxy-1,2,3-oxadiazol-4-ylidenes) which belong to the class of abnormal NHCs. The Pd complexes of the sydnone anions (x-ray anal.) and of the O-ethylsydnone carbenes proved to be efficient catalysts in aryl couplings of thiophenes.

Chemical Communications (Cambridge, United Kingdom) published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C11H8O3, Category: bromides-buliding-blocks.

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

El-Saeed, H. M. published the artcileSynthesis and characterization of novel ionic liquids based on imidazolium for acid corrosion inhibition of aluminum: Experimental, spectral, and computational study, Application of 1-Bromododecane, the publication is Journal of Molecular Liquids (2022), 119177, database is CAplus.

Three newly ionic liquids I [R = C₈H₁₇, C₁₀H₂₁, C₁₂H₂₅] were synthesized and their chem. structures characterized via different spectra techniques (FT-IR, elemental anal., and ¹H NMR). The corrosion inhibition of newly ionic liquids was evaluated on aluminum alloy in 1 M HCl at varied exposure temperatures (298-318 K) and varied concentrations via various exptl. and theor. methods for example mass loss, electrochem., spectral, and computational calculations The results illustrate that these types of ionic liquids inhibit corrosion of aluminum in acid solution with maximum inhibition efficiency was reached 83.2% at 298 K. The inhibition efficiency increases with the addition of zinc sulfate which had a synergistic impact which was reached to 92.7%. Also, the concentration of ionic liquids and the kind of cation have an impact on the obtained results. The existence of these inhibitors in the acidic solution improves the charge transfer resistance and lessens the double-layer capacitance. The Langmuir adsorption isotherm governs the adsorption of these inhibitors’ mols. on the aluminum alloy surface, and they behave as mixed-type inhibitors. The outputs reveal that the computational calculations match the exptl. data rather well.

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