Category: bromides-buliding-blocks

Tang, Wei-Ke published the artcileIrradiation-Induced Cobaloxime-Catalyzed C-H Monofluoroalkylation of Styrenes at Room Temperature, Formula: C4H6BrFO2, the publication is Organic Letters (2019), 21(1), 196-200, database is CAplus and MEDLINE.

A cobaloxime-catalyzed photochem. synthesis of allyl monofluorides from styrenes is described herein. This method is characterized by mild reaction conditions, low-cost catalyst, and broad substrate scope. Furthermore, this convenient method will provide a facile synthesis toward novel monofluoroalkylated natural product and pharmaceutical derivatives Mechanistic investigations indicate that a monofluoroalkyl radical is involved in the catalytic cycle.

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 C10H17N3O2, Formula: C4H6BrFO2.

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

Fan, Bingbing published the artcileHigh-performance conjugated terpolymer-based organic bulk heterojunction solar cells, SDS of cas: 303734-52-3, the publication is Journal of Materials Chemistry A: Materials for Energy and Sustainability (2016), 4(36), 13930-13937, database is CAplus.

Recently, conjugated terpolymers comprising 3 components have attracted tremendous attention. However, quite a few examples of high-performance terpolymers have been reported. We present 2 terpolymers named PtDDA and PtDAA, in which bithiophene (BT) and benzo[1,2-c:4,5-c’]dithiophene-4,8-dione (T1) were chosen as the donor and acceptor units, resp. Thieno[3,2-b]thiophene (TT) and thiazolo[5,4-d]thiazole (TTz) were used as the third component. It is interesting to find that the PtDDA terpolymer shows a typical D1-D2-D1-A1 structure while PtDAA shows a D1-A1-D1-A2 structure. Without using additives or post-annealing processes, PtDAA-based solar cells show a high PCE of 8.1%, with an unprecedented fill factor (FF) of 0.74, which is much higher than those of PtDDA-based devices (PCE =3.4%, FF =0.55). The high efficiency of 8.1% is one of the highest values reported so far for organic solar cells based on conjugated terpolymers. The high performance is mainly ascribed to the efficient carrier transport in the PtDAA:PC₇₁BM active layer, high crystallinity of PtDAA, and high domain purity. The results suggest that constructing conjugated terpolymers with one donor and two acceptor units is an effective strategy for designing high-performance solar cell materials.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about 303734-52-3. 303734-52-3 belongs to bromides-buliding-blocks, auxiliary class Thiophene,Bromide, name is 2-Bromo-3-(2-ethylhexyl)thiophene, and the molecular formula is C12H19BrS, SDS of cas: 303734-52-3.

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

Orda, V. V. published the artcileTransmission of inductive effect of substituents SCF₃, SOCF₃, and SO₂CF₃, through a methylene group, Application of (4-(Bromomethyl)phenyl)(trifluoromethyl)sulfane, the publication is Zhurnal Obshchei Khimii (1965), 35(9), 1628-36, database is CAplus.

cf. CA 63, 1684g. From N.M.R. spectral shifts and pK_a values of substituted toluic, acetic, and phenylacetic acids the following values were deduced for the Taft-Hammett substituents constants: CF₃SCH₂, 0.12 for m- and 0.15 for p-; CF₃SOCH₂, 0.24 for p-; CF₃SO₂CH₂, 0.29 for m- and 0.31 for p-group. The major contribution to these is from the inductive effect but a small and usual negative contribution of the conjugation effect was displayed. The following pK_a values were obtained for: m-CF₃SCH₂C₆H₄CO₂H 5.52, p-isomer 5.48; CF₃SO₂CH₂ m-isomer 5.26, p-isomer 5.23. pK_a values for: CF₃SCH₂CO₂H 2.95; CF₃SOCH₂CO₂H 2.06; CF₃SO₂CH₂CO₂H 1.88. A good agreement was obtained for pK_a of these acids by the rule suggested by Charton (CA 60, 15717h). The pK_a values were calculated from pH data at half neutralization points. ICH₂CO₂Me and CF₃SAg in Me₂CO 6 days gave 70% CF₃SCH₂CO₂Me (I), b. 128°, b₈₀ 71°, n²²_D 1.3896, which with 2N, NaOH at 50° gave the free acid, b₃₁ 101° n²⁰_D 1.3990, d₂₀ 1.4953. PhPCl₂ treated with Cl₂, followed by CF₃SCH₂CO₂H at 70-80°, gave 97% CF₃SCH₂COCl, b. 113-14°; amide m. 89-90°; anilide m. 93-4°. I and 27% H₂O₂ in AcOH refluxed 2 hrs. gave 53% CF₃SOCH₂CO₂Me, b₆ 75-6°, n²⁶_D 1.4089, d₁₆ 1.4877, which with 2N NaOH gave the free acid, m. 78-9.5°. PhCH₂I and CF₃SAg in Me₂CO 4 days gave PhCH₂SCF₃, 66%, b₃₀ 76-7°; similarly were prepared: 68% m-FC₆H₄CH₂SCF₃, b₃₀ 79-80°; p-isomer b₂₆ 78-9°. Oxidation with H₂O₂ gave: 52% PhCH₂SOCF₃, m. 78-9°; 62% m-FC₆H₄CH₂SOCF₃, m. 49-50°; p-isomer, 64%, m. 81-2°. More drastic oxidation with H₂O₂ gave: PhCH₂SO₂CF₃, 74%, m. 103-4°; m-fluoro analog m. 94-5.5°; p-isomer m. 113-14°. Br₂ and p-MeC₆H₄SCF₃ under uv light in C₆H₆ gave 73% p-BrCH₂C₆H₄SCF₃, m. 54-5.5°, b₁₃ 115-18°, which with KCN in aqueous EtOH 1 hr. gave p-NCCH₂C₆H₄SCF₃, m. 22-4°, b₁₃ 135-7°. This heated with aqueous NaOH gave p-CF₃SC₆H₄CH₂CO₂H, m. 116-17.5°, also formed from: p-CF₃SC₆H₄COMe and S in morpholine in 16 hrs. at 160°, followed by treatment with aqueous HCl, to yield the morpholide of above acid, m. 72-3°, which refluxed with 10% NaOH 5 hrs. gave the above free acid. The acid heated with 24% H₂O₂ gave 51% p-CF₃SO₂C₆H₄CH₂CO₂H, m. 124-5°. p-CF₃OC₆H₄CO₂Et reduced with LiAlH₄ at room temperature to 76% p-CF₃OC₆H₄C₂OH, b₁₀ 95-6°, which with saturated HBr 4 hrs. at 80° gave 80% p-CF₃OC₆H₄CH₂Br, b₉ 78-9°, m. 23-4°, which with KCN gave the corresponding nitrile, 63%, b₁₀ 112-13°, which with 20% NaOH gave p-CF₃OC₆H₄CH₂CO₂H, m. 86-7°. The following acids were also reported: m-HO₂CC₆H₄CH₂SCF₃, m. 107-8°; p-isomer m. 159-60°; m-HO₂CC₆H₄CH₂SO₂CF₃, m. 176-7.5°; p-isomer m. 234-5.5°. The following substituent constant values were obtained from pK_a data for: CF₃O group, 0.32-0.4; CF₃S, 0.46-0.49; CF₃SO₂, 0.96-1.04. The NHCOCF₃ group had substituent constant 0.42 for the purely inductive effect from pK_a data and 0.38 from N.M.R. shifts. The conjugation effect contribution is about -0.21.

Zhurnal Obshchei Khimii 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, Application of (4-(Bromomethyl)phenyl)(trifluoromethyl)sulfane.

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

Kolycheva, M. T. published the artcileFluorine-containing amino acids. VII. Polyfluoroalkoxy and polyfluoromethylthio derivatives of phenylalanine, COA of Formula: C8H6BrF3S, the publication is Zhurnal Organicheskoi Khimii (1989), 25(6), 1306-11, database is CAplus.

Condensation of benzyl bromides p-RC₆H₄CH₂Br (R = polyfluoroalkoxy or polyfluoromethylthio) with OCHNHCH(CO₂Et)₂, followed by saponification and acidolytic decarboxylation, afforded phenylalanine derivatives p-RC₆H₄CH₂CH(NH₂)CO₂H. Benzaldehydes p-RC₆H₄CHO (R = F₂CHO, C₂F₅O) condensed with acylglycines R¹CO-Gly-OH (R¹ = Me, Ph) to give oxazolinones I, which were cleaved to the amino acids by hydrogenolysis in the presence of PdCl₂ and Et₃N or by HI-P in AcOH.

Zhurnal Organicheskoi Khimii 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, COA of Formula: C8H6BrF3S.

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

Delbosc, Nicolas published the artcileSynthesis, optoelectronic and photovoltaic properties of conjugated alternating copolymers incorporating 2,1,3-benzothiadiazole or fluorenone units: a comparative study, Formula: C12H19BrS, the publication is RSC Advances (2014), 4(29), 15236-15244, database is CAplus.

A series of p-type alternating copolymers based on oligothiophene and fluorene electron-donating units, and fluorenone or benzothiadiazole electron-withdrawing units was synthesized via Suzuki coupling reaction. Their optical, electrochem. and photovoltaic properties were investigated in detail allowing rational rules to be drawn on the structure-property relationships. We highlight in this work the crucial role of the side solubilizing groups attached to the polymer backbones that have a significant impact on the morphol. of the blends and the solar cell’s power conversion efficiency. Devices with an active area of 0.28 cm², based on fluorenone-copolymers and [70]PCBM blends showed V_oc up to 0.95 V and Power Conversion Efficiencies (PCE) up to 1.82% under AM1.5 simulated sunlight (100 mW cm^-2) conditions. These values are improved compared to the ones reported to date for this class of materials.

RSC Advances published new progress about 303734-52-3. 303734-52-3 belongs to bromides-buliding-blocks, auxiliary class Thiophene,Bromide, name is 2-Bromo-3-(2-ethylhexyl)thiophene, and the molecular formula is C12H19BrS, Formula: C12H19BrS.

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

Tsuji, Hayato published the artcileIndium-catalyzed cycloisomerization of ψ-Alkynyl-β-keto esters into six- to fifteen-membered rings, Application In Synthesis of 81216-14-0, the publication is Angewandte Chemie, International Edition (2007), 46(42), 8060-8062, database is CAplus and MEDLINE.

Many different sizes of rings are made available via heating of ψ-alkynyl-β-keto esters in the presence of In(NTf₂)₃ (Tf = trifluoromethanesulfonyl). The products, produces six- to fifteen-membered ring compounds are produced in good yields. The reaction features low catalyst loading and moderately dilute conditions, and the formation of medium-sized rings is sometimes faster than that for the corresponding six-membered rings. Cycloisomerization of 3-oxo-16-heptadecynoic acid Me ester gave 2-methyl-15-oxo-1-cyclopentadecene-1-carboxylic acid Me ester. Reduction of the latter gave 2-methyl-15-oxo-1-cyclopentadecanecarboxylic acid Me ester. Decarboxylation of this intermediate gave (±)-muscone (i.e., 3-methylcyclopentadecanone).

Angewandte Chemie, International Edition published new progress about 81216-14-0. 81216-14-0 belongs to bromides-buliding-blocks, auxiliary class Linker,PROTAC Linker, name is 7-Bromohept-1-yne, and the molecular formula is C18H10F3NO3S2, Application In Synthesis of 81216-14-0.

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

Morimoto, Tsumoru published the artcileRh(I)-Catalyzed CO Gas-Free Carbonylative Cyclization Reactions of Alkynes with 2-Bromophenylboronic Acids Using Formaldehyde, Synthetic Route of 89694-44-0, the publication is Organic Letters (2009), 11(8), 1777-1780, database is CAplus and MEDLINE.

The rhodium(I)-catalyzed reaction of alkynes with 2-bromophenylboronic acids in the presence of paraformaldehyde resulted in a CO gas-free carbonylative cyclization, yielding indenone derivatives [RhCl(BINAP)]₂ and [RhCl(cod)]₂ were responsible for the decarbonylation of formaldehyde and the subsequent carbonylation of alkynes with 2-haloboronic acids, resp., leading to efficient whole carbonylation. Sterically bulky and electron-withdrawing groups on unsym. substituted alkynes favored the α-position of indenones.

Organic Letters 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

Wu, Liqiang published the artcileSynthesis of 6-bromoquinolines using benzyltrimethylammonium tribromide, Category: bromides-buliding-blocks, the publication is Youji Huaxue (2010), 30(8), 1250-1254, database is CAplus.

Several 6-bromoquinoline derivatives were designed and the synthesis of the target compounds was achieved in high yield by a reaction of 2-aminobenzophenone [i.e., (2-aminophenyl)(phenyl)methanone] with α-methylene carbonyl compounds in the presence of benzyltrimethylammonium tribromide as a phase-transfer catalyst in acetonitrile at room temperature and the products thus obtained were confirmed by ¹H-NMR, ¹³C-NMR spectra and elemental anal. The title compounds thus reported included 8-bromo-10-phenyl-11H-indeno[1,2-b]quinolin-11-one, 2-bromo-12-phenylbenz[b]acridine-6,11-dione and 6-bromo-4-phenylquinoline derivatives, 7-bromo-9-phenyl-1H-cyclopenta[b]quinoline derivatives, etc.

Youji Huaxue 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, Category: bromides-buliding-blocks.

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

Manabe, Takao published the artcileNew Examples of 1,6- and 1,7-Hydrogen Transfer Promoted by an α-Silyl Group in Rhodium(I)-Catalyzed Radical Reactions of Acyclic Enediynes, SDS of cas: 69361-41-7, the publication is Organometallics (1998), 17(14), 2942-2944, database is CAplus.

A Rh(I) catalyst triggers cycloaromatization of ω-trialkylsilylated acyclic enediynes to afford benzosilacycloalkane or vinylsilane products via 1,6- and/or 1,7-H transfer, presumably effected by radical stabilization by an α-silyl moiety and via a seven- and/or eight-membered rhodacycle intermediate. The addition of a catalytic amount of di-Me maleate is essential to obtain better yields of the products.

Organometallics 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, SDS of cas: 69361-41-7.

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

Di Yang published the artcileStudy on mechanism of a simple method to regulate salt tolerance of hydrophobically associating water-soluble polymers, Synthetic Route of 143-15-7, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2022), 128266, database is CAplus.

Salt tolerance is one of the important properties of hydrophobically associating water-soluble polymers (HAWSPs). In this work, HAWSPs with different hydrophobic monomer (M12) contents (0.3 mol% and 0.5 mol%) were synthesized. The viscosity of two polymers was measured. Mol. simulation (MS) were carried out to elucidate the salt tolerance mechanism. Results show that the polymer with a higher M12 content exhibits better salt tolerance. With increasing salt content, the radius of gyration of the polymers continuously decreases when M12 content is low, while it tends to increase and then decrease under high M12 contents. Combined with the spatial conformation, it can be found that only sufficient hydrophobic monomers can enhance the association effect of the polymers, forming more hydrophobic microregions and improving the viscosity. The radial distribution function results demonstrate the little effect of salt on hydrogen bonds. This work illustrates that simply adjusting the content of hydrophobic monomers is an effective strategy to regulate the salt tolerance of the polymers, which can significantly reduce the cost of salt-tolerant polymers.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects 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, Synthetic Route of 143-15-7.

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