Month: December 2022

Ladanyi, L. published the artcileDetermination of the enantiomeric composition of chiral carboxylic acids using chiral derivatization and HPLC, Product Details of C4H7BrO2, the publication is Chromatographia (1987), 477-81, database is CAplus.

The enantiomers of chiral carboxylic acids were separated as their diastereomeric amides with (1R,2R)-(-)-1-(4-nitrophenyl)-2-amino-1,3-propanediol (levo-base) and with dextrobase (the enantiomer of levobase) by high-performance liquid chromatog. using a conventional C-18 column and various solvent systems containing MeCN, MeOH, H₂O, and phosphoric acid.

Chromatographia 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 C4H7BrO2, Product Details of C4H7BrO2.

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

Fischer, J. published the artcileSynthesis of N-(2-hydroxy-5-methylphenyl)-substituted amino acids, Category: bromides-buliding-blocks, the publication is Magyar Kemiai Folyoirat (1997), 103(7), 331-335, database is CAplus.

N-(2-hydroxy-5-methylphenyl)-substituted amino acids were prepared from 2-amino-4-methylphenol by (1) nucleophilic substitution with halogenated carboxylic acids, (2) condensation with α-keto carboxylic acid derivatives, and (3) reductive alkylation with α-keto esters. The advantages and disadvantages of these methods depend on the target mols.

Magyar Kemiai Folyoirat 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 C4H7BrO2, Category: bromides-buliding-blocks.

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

Wisniewska, Hanna M. published the artcileFunctional-Group-Tolerant, Nickel-Catalyzed Cross-Coupling Reaction for Enantioselective Construction of Tertiary Methyl-Bearing Stereocenters, HPLC of Formula: 69361-41-7, the publication is Journal of the American Chemical Society (2013), 135(24), 9083-9090, database is CAplus and MEDLINE.

The first Negishi nickel-catalyzed stereospecific cross-coupling reaction of secondary benzylic esters is reported. A series of traceless directing groups is evaluated for ability to promote cross-coupling with dimethylzinc. Esters with a chelating thioether derived from com. available 2-(methylthio)acetic acid are most effective [e.g., (R)-1-(2-naphthyl)-1-Pr 2-(methylthio)acetate + ZnMe₂ → (S)-2-(sec-butyl)naphthalene]. The products are formed in high yield and with excellent stereospecificity. A variety of functional groups are tolerated in the reaction including alkenes, alkynes, esters, amines, imides, and O-, S-, and N-heterocycles. The utility of this transformation is highlighted in the enantioselective synthesis of a retinoic acid receptor agonist and a fatty acid amide hydrolase inhibitor.

Journal of the American Chemical Society 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 C22H32O2, HPLC of Formula: 69361-41-7.

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

Sivakumar, Irla published the artcileRubicene, an Unusual Contorted Core for Discotic Liquid Crystals, Product Details of C12H25Br, the publication is Chemistry – An Asian Journal (2022), 17(8), e202200073, database is CAplus and MEDLINE.

Rubicene, an unusual contorted polycyclic aromatic hydrocarbon, was realized to function as a novel core fragment for discotic liquid crystals. The central π-conjugated motif was prepared from dialkoxyiodobenzene via Sonagashira coupling followed by pentannulation and Scholl cyclodehydrogenation. The synthesized rubicene derivatives were found to be thermally stable and exhibit enantiotropic columnar mesophases. The columnar arrangement of these derivatives has been validated using polarising optical microscopy, differential scanning calorimetry & small-angle X-ray scattering.

Chemistry – An Asian Journal 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 C8H7ClO3, Product Details of C12H25Br.

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

Zhang, Qian published the artcileSynthesis, Structures, and Properties of BN-Dinaphthothiophenes: Influence of B and N Placement on Photophysical Properties and Aromaticity, Category: bromides-buliding-blocks, the publication is Journal of Organic Chemistry (2020), 85(12), 7877-7883, database is CAplus and MEDLINE.

Substitution of the C=C functionality with the isosteric and isoelectronic B-N moiety has emerged as a powerful way to expand the family of polycyclic aromatic hydrocarbons. In this paper, two types of BN-dinaphthothiophene (BN-DNT) derivatives with different B and N substitution patterns were synthesized in short steps from com. available materials. X-ray crystallog. anal. revealed that BN-DNT had rigid and planar frameworks. Their photophys. properties and the aromaticity of the BN rings of the BN-DNTs were slightly dependent on the B and N substitution patterns. However, their response toward fluoride anions was greatly dependent on the B and N substitution patterns.

Journal of Organic Chemistry 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 C15H15OP, Category: bromides-buliding-blocks.

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

Obreque-Balboa, Jose Esteban published the artcileFlavonoid derivatives as selective ABCC1 modulators: Synthesis and functional characterization, HPLC of Formula: 21101-63-3, the publication is European Journal of Medicinal Chemistry (2016), 124-133, database is CAplus and MEDLINE.

A series of chromones, bearing substituted amino groups or N-substituted carboxamide moieties in position 2, was synthesized and characterized in cellular assays for modulation of the ABC transporters ABCC1 (MDCKII-MRP1 cells), ABCB1 (Kb-V1 cells) and ABCG2 (MCF-7/Topo cells). The most potent ABCC1 modulators identified among these flavonoid-type compounds were comparable to the reference compound reversan regarding potency, but superior in terms of selectivity concerning ABCB1 and ABCG2 (2-[4-(Benzo[c][1,2,5]oxadiazol-5-ylmethyl)piperazin-1-yl]-5,7-dimethoxy-4H-chromen-4-one: ABCC1, IC₅₀ 11.3 μM; inactive at ABCB1 and ABCG2). This compound was as effective as reversan in reverting ABCC1-mediated resistance to cytostatics in MDCKII-MRP1 cells and proved to be stable in mouse plasma and cell culture medium. Modulators, such 2-[4-(Benzo[c][1,2,5]oxadiazol-5-ylmethyl)piperazin-1-yl]-5,7-dimethoxy-4H-chromen-4-one, were of potential value as pharmacol. tools for the investigation of the (patho)physiol. role of ABCC1.

European Journal of Medicinal Chemistry published new progress about 21101-63-3. 21101-63-3 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,sulfides,Benzyl bromide,Benzene, name is (4-(Bromomethyl)phenyl)(trifluoromethyl)sulfane, and the molecular formula is C8H6BrF3S, HPLC of Formula: 21101-63-3.

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

Xiang, Panjie published the artcileDirect benzylation reactions from benzyl halides enabled by transition-metal-free photocatalysis, SDS of cas: 76283-09-5, the publication is Chinese Chemical Letters (2022), 33(12), 5074-5079, database is CAplus.

An SN²-based photochem. strategy using dithiocarbamate anion as catalyst was developed for the activation of benzyl halides, which are extremely challenging to be applied as radical precursors in visible light photocatalysis. With this transition-metal-free and oxidant-free protocol, the benzylation (or cyanomethylation) of various heterocycles including quinoxalin-2(1H)-ones, coumarin, 2-phenyl-2H-indazole, 1-methyl-5-phenylpyrazin-2(1H)-one, 1-(fluoromethyl)cinnolin-4(1H)-one, and 2,4-dibenzyl-1,2,4-triazine-3,5(2H,4H)-dione could be realized (46 examples, up to 98% yield). Importantly, some biol. relevant 3-benzylquinoxalin-2(1H)-ones were also be synthesized under mild conditions.

Chinese Chemical 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 C13H18N2, SDS of cas: 76283-09-5.

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

Milne, Kirsty published the artcileA fragment-like approach to PYCR1 inhibition, Related Products of bromides-buliding-blocks, the publication is Bioorganic & Medicinal Chemistry Letters (2019), 29(18), 2626-2631, database is CAplus and MEDLINE.

Pyrroline-5-carboxylate reductase 1 (PYCR1) is the final enzyme involved in the biosynthesis of proline and has been found to be upregulated in various forms of cancer. Due to the role of proline in maintaining the redox balance of cells and preventing apoptosis, PYCR1 is emerging as an attractive oncol. target. Previous PYCR1 knockout studies led to a reduction in tumor growth. Accordingly, a small mol. inhibitor of PYCR1 could lead to new treatments for cancer, and a focused screening effort identified pargyline as a fragment-like hit. Herein the design and synthesis of the first tool compounds as PYCR1 inhibitors, derived from pargyline, which were assayed to assess their ability to attenuate the production of proline, are reported. Structural activity studies have revealed the key determinants of activity, with the most potent compound, 4-bromobenzyl(propargyl)methylamine, showing improved activity in vitro in enzyme (IC₅₀ = 8.8μM) and pathway relevant effects in cell-based assays.

Bioorganic & Medicinal Chemistry 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, Related Products of bromides-buliding-blocks.

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

Uno, Misae published the artcileSynthesis of 4,4-Difluoroalkenes by Coupling of α-Substituted α,α-Difluoromethyl Halides with Allyl Sulfones under Photoredox Catalyzed Conditions, Computed Properties of 401-55-8, the publication is Journal of Organic Chemistry (2019), 84(14), 9330-9338, database is CAplus and MEDLINE.

Photoredox-catalyzed allylation of α-gem-difluorinated organohalides with allyl sulfones proceeded smoothly under visible light irradiation to give 4,4-difluoroalkenes in good yields. In the presence of catalytic Ru(bpy)₃Cl₂, Hantzsch ester, and diisopropylethylamine, the reaction was complete within 2 h. Using the same methodol., three-component cascade reactions to give 6,6-difluoroalkenes were carried out successfully.

Journal of Organic Chemistry 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 C19H14Cl2, Computed Properties of 401-55-8.

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

Reichenbaecher, Katharina published the artcileModification of channel structures by fluorination, HPLC of Formula: 1998-61-4, the publication is New Journal of Chemistry (2004), 28(3), 393-397, database is CAplus.

Two perfluorinated triazines [2,4,6-tris(p-bromotetrafluorophenoxy)-1,3,5-triazine (2) and 2,4,6-tris(pentafluorophenoxy)-1,3,5-triazine (3)] were synthesized to study their crystal structure and inclusion character. Compound 3 forms channel inclusions with the solvents p-xylene and p-chlorotoluene, showing a stoichiometry of 2:1 (host:guest). The channels have dimensions of 7.6 × 3 Ų. The host-guest interactions, perfluorophenyl-Ph stacking, F···H- and CH···π(perfluorophenyl) contacts, were revealed by the crystallog. and solid state NMR spectroscopy studies. The reversibility of the sorption process through the gas phase could be demonstrated by X-ray diffraction. In contrast to the pentafluorinated compound 3, the tetrafluorinated one (2) showed no inclusions with a number of typical solvents.

New Journal of Chemistry published new progress about 1998-61-4. 1998-61-4 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzene,Phenol, name is 4-Bromo-2,3,5,6-tetrafluorophenol, and the molecular formula is C6HBrF4O, HPLC of Formula: 1998-61-4.

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