Category: bromides-buliding-blocks

Chu, Edith Ju-Hwa published the artcileSymmetrical diaryldialkylethanediols. I. 2,3-Diphenyl-2,3-butanediol, Application of 2,3-Dibromo-2,3-dimethylbutane, the publication is Journal of the Chinese Chemical Society (Peking) (1942), 190-5, database is CAplus.

Bz₂ (0.0642 g. mol.) was added to 100 cc. of anhydrous Et₂O containing the Grignard reagent prepared from 0.37 g. mol. of Mg and 0.264 g. mol. of MeI. After the vigorous reaction had subsided, the mixture was refluxed for 3 hrs. and then hydrolyzed with 40 g. of NH₄Cl in 200 cc. cold H₂O. The crude 2,3-diphenyl-2,3-butanediol (I) was extracted from the reaction mixture with Et₂O and C₆H₆ and crystallized from alc., m. 118° (52% yield). Distillation of the mother liquor yielded α-methyl-α-phenylpropiophenone (II), m. 45° b. 307°. An alternative method for preparing I was to dissolve 0.036 g. mol. of PhCOMe (III) in 20 cc. of iso-PrOH and expose to sunlight for 1 month. After removal of the solvent, a quant. yield of a mixture of the high-and low-melting modifications of I was obtained, m. 84° (not sharp). A separation of the modifications was effected by fractional crystallization from CCl₄, the high-melting modification being less soluble Poor yields of I were obtained when III was reduced with Na or Mg amalgam. I (0.0144 g. mol.) was boiled with 5 cc. of HOAc containing a few crystals of iodine for 1 hr. The reaction mixture was poured into aqueous NaHSO₃ and extracted with Et₂O. From the Et₂O, II was obtained in 89% yield, m. 41-2° b₆₁₀ 300-1°. Oxime, m. 151.2-2.2° (from alc.). I (0.0023 g. mol.) refluxed with 5 cc. of Ac₂O for 1.5 hrs. yielded a mixture of II and unreacted I.

Journal of the Chinese Chemical Society (Peking) 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, Application of 2,3-Dibromo-2,3-dimethylbutane.

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

Rossi, Renzo published the artcileSelective and efficient syntheses of phototoxic 2,2′:5′,2”-terthiophene derivatives bearing a functional substituent in the 3′- or the 5-position, HPLC of Formula: 69361-41-7, the publication is Tetrahedron (1991), 47(39), 8443-60, database is CAplus.

Efficient and selective procedures were developed to prepare on a medium scale several phototoxic 2,2′:5′:2″-terthiophene derivatives of general formula 2 (X = OEt, SMe) and 3 [Y = CHF₂, OMe, Br, CO₂Et, CONHCH₂CHMe₂, CH:CHCO₂Et-(E), CH:CHCONHCH₂CHMe₂-(E), CC-CH₂CH₂CH:CHCONHCH₂CHMe₂-(E)] which are characterized by a functional substituent in the 3′- or the 5-position. Most of these procedures, which are based on the construction of the 2,2′:5′,2”-terthiophene moiety and involve palladium-mediated carbon-carbon bond forming reactions, overcome synthetic difficulties found in the synthesis of 2 and 3 starting from 2,2′:5′,2”-terthiophene 1 (R¹-R⁶ = H).

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, HPLC of Formula: 69361-41-7.

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

Ebert, Max published the artcileJoint Venture of Metal Cluster and Amphiphilic Cationic Minidendron Resulting in Near Infrared Emissive Lamellar Ionic Liquid Crystals, SDS of cas: 143-15-7, the publication is Chemistry – A European Journal (2022), 28(3), e202103446, database is CAplus and MEDLINE.

Red-near-IR emissive hybrid materials obtained with phosphorescent octahedral Mo cluster anions electrostatically associated with amphiphilic guanidinium minidendrons are presented. Polarized optical microscopy and x-ray anal. show that while the minidendron chloride salts self-organize into columnar phases, their association with the dianionic metal cluster leads to layered phases. Steady-state and time-resolved emission studies demonstrate the influence of the minidendron alkyl chain length on the phosphorescence of the metal cluster core.

Chemistry – A European 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 C12H25Br, SDS of cas: 143-15-7.

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

Sokolsky, Alexander published the artcileSynthesis of a C(1)-C(23) Fragment for Spirastrellolide E: Development of a Mechanistic Rationale for Spiroketalization, Safety of (4-Bromobut-1-yn-1-yl)trimethylsilane, the publication is Organic Letters (2015), 17(8), 1898-1901, database is CAplus and MEDLINE.

Synthetic anal. of spirastrellolide E envisioned to entail a cross-metathesis union of the northern and southern hemispheres followed by a Sharpless epoxidation/methylation sequence to achieve the C(22,23) stereogenicity leads to the design of a C(1)-C(23) advanced southern hemisphere, I, exploiting a gold-catalyzed directed spiroketalization as a key step. Stereochem. anal. of this strategic transformation provides insight on the impact of the directing group carbinol stereogenicity on the reaction efficiency and, in turn, permits the conversion of the minor isomer of the spiroketal precursor to the requisite congener for successful spiroketalization.

Organic Letters 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 C13H16O2, Safety of (4-Bromobut-1-yn-1-yl)trimethylsilane.

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

Dai, Chaofeng published the artcileUsing boronolectin in MALDI-MS imaging for the histological analysis of cancer tissue expressing the sialyl Lewis X antigen, Name: 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, the publication is Chemical Communications (Cambridge, United Kingdom) (2011), 47(37), 10338-10340, database is CAplus and MEDLINE.

Certain carbohydrate-based biomarkers are known to correlate with cancer formation and progression. By targeting sialyl Lewis X, the authors have developed the first boronolectin-MS tag conjugate, which allows for MALDI-based imaging of cancer based on its cell surface carbohydrate.

Chemical Communications (Cambridge, United Kingdom) published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C12H16BBrO2, Name: 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane.

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

Shi, Qingzhao published the artcileSolubilization and release of fragrance agents in aqueous solution of carbon dioxide switchable surfactants, Application of 1-Bromooctane, the publication is Journal of Surfactants and Detergents (2022), 25(2), 245-253, database is CAplus.

This study describes the enhancement in the solubility and controlled-release of fragrance agents (menthol, four n-alkanols, and three aromatic esters) using three CO₂ switchable surfactants (N-alkylimidazolium bicarbonates). The surfactants significantly improved the solubility of fragrance agents in water. N-Dodecylimidazolium bicarbonate was the most effective surfactant to solubilize menthol. A stability test indicated that the surfactant could stably disperse menthol in water. Moreover, the surfactants improved the solubility of n-alkanols to different levels, however, the solubility of the aromatic esters equally. The release of menthol from the surfactant solution under N₂ at different durations of bubbling time, temperatures, and flow velocities were studied.

Journal of Surfactants and Detergents 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 C6H13NO2, Application of 1-Bromooctane.

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

Shi, Qingzhao published the artcileSolubilization and release of fragrance agents in aqueous solution of carbon dioxide switchable surfactants, Application of 1-Bromododecane, the publication is Journal of Surfactants and Detergents (2022), 25(2), 245-253, database is CAplus.

This study describes the enhancement in the solubility and controlled-release of fragrance agents (menthol, four n-alkanols, and three aromatic esters) using three CO₂ switchable surfactants (N-alkylimidazolium bicarbonates). The surfactants significantly improved the solubility of fragrance agents in water. N-Dodecylimidazolium bicarbonate was the most effective surfactant to solubilize menthol. A stability test indicated that the surfactant could stably disperse menthol in water. Moreover, the surfactants improved the solubility of n-alkanols to different levels, however, the solubility of the aromatic esters equally. The release of menthol from the surfactant solution under N₂ at different durations of bubbling time, temperatures, and flow velocities were studied.

Journal of Surfactants and Detergents 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 C14H21BO2, Application of 1-Bromododecane.

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

Anand, Radhika published the artcileStereoselective Synthesis of Nonpsychotic Natural Cannabidiol and Its Unnatural/Terpenyl/Tail-Modified Analogues, Formula: C12H25Br, the publication is Journal of Organic Chemistry (2022), 87(7), 4489-4498, database is CAplus and MEDLINE.

Here, we report a three-step concise and stereoselective synthesis route to one of the most important phytocannabinoids, namely, (-)-cannabidiol (-CBD), from inexpensive and readily available starting material R-(+)-limonene. The synthesis involved the diastereoselective bifunctionalization of limonene, followed by effective elimination leading to the generation of key chiral p-mentha-2,8-dien-1-ol. The chiral p-mentha-2,8-dien-1-ol on coupling with olivetol under silver catalysis provided regiospecific (-)-CBD, contrary to reported ones which gave a mixture The newly developed approach was further extended to its structural analogs cannabidiorcin and other tail/terpenyl-modified analogs. Moreover, its opposite isomer (+)-cannabidiol was also successfully synthesized from S-(-)-limonene.

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, Formula: C12H25Br.

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

Chochos, Christos L. published the artcileExperimental and theoretical investigations on the optical and electrochemical properties of π-conjugated donor-acceptor-donor (DAD) compounds toward a universal model, Computed Properties of 52431-30-8, the publication is Journal of Chemical Physics (2018), 149(12), 124902/1-124902/9, database is CAplus and MEDLINE.

A series of nine (9) donor-acceptor-donor (DAD) π-conjugated small mols. were synthesized via palladium catalyzed Stille aromatic cross-coupling reactions by the combination of six (6) heterocycle building blocks (thiophene, furan, thiazole, 2,1,3-benzothiadiazole, 2,1,3-pyridinothiadiazole, thienothiadiazole) acting as electron donating (thiazole, furan, thiophene) and electron deficient (benzothiadiazole, pyridinethiadiazole, thienothiadiazole) units. These model compounds enable determining the correspondence between the theor. and exptl. optical and electrochem. properties for the first time, via D. Functional Theory (DFT), time-dependent DFT, UV-Vis spectroscopy, and cyclic voltammetry, accordingly. The obtained theor. models can be utilized for the design and synthesis of new DAD structures with precise optical bandgaps, absorption maxima, and energy levels suitable for different optoelectronic applications. (c) 2018 American Institute of Physics.

Journal of Chemical Physics 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 C4Br2N2O4S, Computed Properties of 52431-30-8.

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

Lebrun, Stewart published the artcileAscorbic acid specifically reduces the misclassification of nonirritating reactive chemicals in the OptiSafe macromolecular eye irritation test, Name: 1-Bromooctane, the publication is Toxicology In Vitro (2022), 105313, database is CAplus and MEDLINE.

Recently, we showed that the addition of physiol. concentrations of ascorbic acid, a tear antioxidant, to the OptiSafe macromol. eye irritation test reduced the false-pos. (FP) rate for chems. that had reactive chemistries, leading to the formation of reactive oxygen species (ROS) and mol. crosslinking. The purpose of the current study was to 1) increase the number of chems. tested to comprehensibly determine whether the antioxidant-associated reduction in OD is specific to FP chems. associated with ROS chemistries and 2) determine whether the addition of antioxidants interferes with the detection of true pos. (TP) and true neg. (TN) ocular irritants. We report that when ascorbic acid is added to the test reagents, retesting of FP chems. with reactive chemistries show significantly reduced OD values (P < 0.05). Importantly, ascorbic acid had no significant effect on the OD values of TP or TN chems. regardless of chem. reactivity. These findings suggest that supplementation of ascorbic acid in alternative ocular irritation tests may help improve the detection of TN for those commonly misclassified reactive chems.

Toxicology In Vitro 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, Name: 1-Bromooctane.

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