Month: November 2022

Gao, Caiyan published the artcileIn situ oxidation synthesis of p-type composite with narrow-bandgap small organic molecule coating on single-walled carbon nanotube: flexible film and thermoelectric performance, Formula: C4Br2N2O4S, the publication is Small (2018), 14(12), n/a, database is CAplus and MEDLINE.

Although composites of organic polymers or n-type small mol./carbon nanotube (CNT) have achieved significant advances in thermoelec. (TE) applications, p-type TE composites of small organic mols. as thick surface coating layers on the surfaces of inorganic nanoparticles still remain a great challenge. Taking advantage of in situ oxidation reaction of thieno[3,4-b]pyrazine (TP) into TP di-N-oxide (TPNO) on single-walled CNT (SWCNT) surface, a novel synthesis strategy is proposed to achieve flexible films of TE composites with narrow-bandgap (1.19 eV) small mol. coating on SWCNT surface. The TE performance can be effectively enhanced and conveniently tuned by poly(sodium-p-styrenesulfonate) content, TPNO/SWCNT mass ratio, and posttreatment by various polar solvents. The maximum of the composite power factor at room temperature is 29.4 ± 1.0 μW m^-1 K^-2. The work presents a way to achieve flexible films of p-type small organic mol./inorganic composites with clear surface coating morphol. for TE application.

Small 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, Formula: C4Br2N2O4S.

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

Richard, Jean-Alexandre published the artcileA Chiral-Pool-Based Approach to the Core Structure of (+)-Hyperforin, Product Details of C7H13BrSi, the publication is European Journal of Organic Chemistry (2012), 2012(3), 484-487, S484/1-S484/38, database is CAplus.

Asym. entry to the bicyclic core structure I of (+)-hyperforin is presented. The developed synthetic strategy features a carefully orchestrated stereochem. relay from the single chiral center residing within (-)-Wieland-Miescher ketone and an intramol. aldol reaction to cast the [3.3.1] bicyclic scaffold found in a diverse array of polycyclic polyprenylated acylphloroglucinols.

European Journal of Organic Chemistry 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, Product Details of C7H13BrSi.

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

Cheng, Yen-Ju published the artcileThieno[3,2-b]pyrrolo donor fused with benzothiadiazolo, benzoselenadiazolo and quinoxalino acceptors: Synthesis, characterization, and molecular properties, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Organic Letters (2011), 13(20), 5484-5487, database is CAplus and MEDLINE.

Nitrogen-bridged donor-acceptor multifused dithienopyrrolobenzothiadiazole (DTPBT) and dibenzothiadiazolopyrrolothiophene (DBTPT) were successfully synthesized by intramol. Cadogan annulation. The electron-deficient benzothiadiazole unit in DTPBT can be converted to benzoselenadiazole and quinoxaline moieties through reduction/cyclization to generate dithienopyrrolobenzoselenadiazole (DTPBSe) and dithienopyrroloquinoxaline (DTPQX), resp. The nitrogen atoms function as the bridges for covalent planarization to induce intermol. interaction and intramol. charge transfer.

Organic Letters 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, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene.

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

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

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

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

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

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

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