Category: bromides-buliding-blocks

Gleiter, Rolf published the artcileRegiochemistry of the intramolecular [2+2] photocycloaddition of enones to vinyl ethers as a function of chain length, Formula: C7H13BrSi, the publication is Chemische Berichte (1992), 125(8), 1899-911, database is CAplus.

The intramol. [2+2] cycloaddition of a cyclohexenone moiety bound to a vinyl ether fragment has been explored. The regiochem. and the quantum yield of the reaction have been investigated as a function of the chain length n and the position of the methoxy group. In those cases where the chain consists of 3 and 4 members the position of the methoxy group has no influence on the regiochem. but on the quantum yield. Only head-to-head cycloaddition is observed In the case of n = 2 both the regiochem. and the quantum yield depend strongly on the position of the methoxy group. The main reason for the different behavior of n = 2 is due to a through-bond effect between the two olefinic units mediated by a C₂H₄ bridge.

Chemische Berichte 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, Formula: C7H13BrSi.

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

Chenede, Alain published the artcileCationic rearrangements controlled by the presence of a silyl group, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane, the publication is Journal of Organometallic Chemistry (2003), 686(1-2), 84-93, database is CAplus.

1,1-Disilylcarbinols having two alkyl groups on the adjacent carbon atom react with thionyl chloride in sulfur dioxide to give the product in which one of the alkyl groups has migrated towards the two silyl groups, and one of the silyl groups has been removed from the resultant cation. The reaction is seen in ring-expansion, as in the conversion of cyclohexylbis[dimethyl(phenyl)silyl]carbinol into 1-dimethyl(phenyl)silylcycloheptene, and in open chains, as in the conversion of 1,1-bis[dimethyl(phenyl)silyl]-2-methylpropanol into (E)- and (Z)-2-dimethyl(phenyl)silylbut-2-ene. Phenyldimethylsilyllithium reacts with pinacolone to give the α-silyl carbinol, which rearranges in the same way to give 2,3-dimethylbut-2-ene, effectively achieving a pinacolone-to-pinacol rearrangement.

Journal of Organometallic Chemistry 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, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane.

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

Zoombelt, Arjan P. published the artcileSynthesis and photovoltaic performance of a series of small band gap polymers, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Journal of Materials Chemistry (2009), 19(30), 5336-5342, database is CAplus.

A series of four small band gap polymers have been synthesized and have been incorporated into bulk heterojunction solar cells. The polymers were prepared via Yamamoto coupling and consist of alternating electron-rich dithiophene and electron-deficient bisquinoxaline or thienopyrazine units. In the thin solid films the optical band gaps vary from 1.38 eV for the bisquinoxaline to 1.21 eV for thienopyrazine containing polymers. All polymers provide a photovoltaic response when blended with a methanofullerene as electron acceptor in the near-IR region up to the optical band gap. The best cells reach an efficiency of 1.5% under estimated standard solar light conditions (air-mass 1.5G, 100 mW/cm²).

Journal of Materials 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 C9H9BrO2, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene.

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

Davison, Edwin C. published the artcileN-Alkenyl nitrone dipolar cycloaddition routes to piperidines and indolizidines. Part 8. The scope of tandem reactions involving hydroxylamine-alkyne cyclizations, COA of Formula: C7H13BrSi, the publication is Tetrahedron (1996), 52(35), 11601-11624, database is CAplus.

A tandem sequence of hydroxylamine-alkyne cyclization/1,3-dipolar cycloaddition, provides useful entry into tricyclic systems of type I. The scope of such reactions is explored in this paper. A novel cascade cyclization of N-hydroxypyrrolidines of type II (n = 1, 3) involving hydroxylamine-alkyne cyclization, Cope elimination and 1,3-dipolar cycloaddition is also reported.

Tetrahedron 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

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, Recommanded Product: 1-Bromooctane, 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 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

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

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

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

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

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