Author: Jessica.F

Li, Jin published the artcileDifluoroalkylation/C-H Annulation Cascade Reaction Induced by Visible-Light Photoredox Catalysis, Synthetic Route of 401-55-8, the publication is Journal of Organic Chemistry (2016), 81(20), 9992-10001, database is CAplus and MEDLINE.

We report the first example of difluoroalkylation/ C-H annulation cascade reactions of cyclopropyl olefins induced by visible-light photoredox catalysis regioselectively affording partially hydrogenated naphthalenes and quinolines with a variety of difluorinated side chains. The alkylation reagent could be extended to monofluoro and trifluoro reagents, nitrile and malonate. The regioselectivity was investigated by means of d. functional theory calculations

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 C4H6BrFO2, Synthetic Route of 401-55-8.

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

Deng, Jian-Chao published the artcileSulfite-Induced N-Alkylation and Thioketonization of Azoles Enable Access to Diverse Azole Thiones, Safety of Ethylbromofluoroacetate, the publication is Advanced Synthesis & Catalysis (2018), 360(24), 4795-4806, database is CAplus.

The direct modification of azole skeletons enables access to drug-like mols. The development of a highly compatible reaction platform for this pursuit still remains challenging. Herein, we report the use of sulfite as the single electron transfer (SET) reducing agent for the activation of functionalized bromoalkanes, elemental sulfur, and imidazoliniums for the transition metal-free and base-free N-alkylation and thioketonization of azoles. Excellent functional group tolerance and high synthetic efficiency proved particularly advantageous for the rapid assembly of a large array of pharmaceutically-oriented azole thiones , e.g., I, many of which contain synthetically and biol. useful functional groups. The direct transformation of drug mols. (such as Ketoconazole, Econazole, and Fluconazole) into their corresponding azole thiones has also been successfully achieved. Reactions with selenium also proceeded smoothly under the optimized conditions. Successful gram-scale reactions demonstrate the good applicability of this methodol.

Advanced Synthesis & Catalysis 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 C4H6BrFO2, Safety of Ethylbromofluoroacetate.

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

Chao, Pengjie published the artcileA Benzo[1,2-b:4,5-c′]Dithiophene-4,8-Dione-Based Polymer Donor Achieving an Efficiency Over 16%, Recommanded Product: 2-Bromo-3-(2-ethylhexyl)thiophene, the publication is Advanced Materials (Weinheim, Germany) (2020), 32(10), 1907059, database is CAplus and MEDLINE.

It is of great significance to develop efficient donor polymers during the rapid development of acceptor materials for nonfullerene bulk-heterojunction (BHJ) polymer solar cells. Herein, a new donor polymer, named PBTT-F, based on a strongly electron-deficient core (5,7-dibromo-2,3-bis(2-ethylhexyl)benzo[1,2-b:4,5-c′]dithiophene-4,8-dione, TTDO), is developed through the design of cyclohexane-1,4-dione embedded into a thieno[3,4-b]thiophene (TT) unit. When blended with the acceptor Y6, the PBTT-F-based photovoltaic device exhibits an outstanding power conversion efficiency (PCE) of 16.1% with a very high fill factor (FF) of 77.1%. This polymer also shows high efficiency for a thick-film device, with a PCE of ≈14.2% being realized for an active layer thickness of 190 nm. In addition, the PBTT-F-based polymer solar cells also show good stability after storage for ≈700 h in a glove box, with a high PCE of ≈14.8%, which obviously shows that this kind of polymer is very promising for future com. applications. This work provides a unique strategy for the mol. synthesis of donor polymers, and these results demonstrate that PBTT-F is a very promising donor polymer for use in polymer solar cells, providing an alternative choice for a variety of fullerene-free acceptor materials for the research community.

Advanced Materials (Weinheim, Germany) 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, Recommanded Product: 2-Bromo-3-(2-ethylhexyl)thiophene.

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

Wang, Xiaosha published the artcilePrecise fluorination of polymeric donors towards efficient non-fullerene organic solar cells with balanced open circuit voltage, short circuit current and fill factor, Formula: C6HBrF4O, the publication is Journal of Materials Chemistry A: Materials for Energy and Sustainability (2021), 9(26), 14752-14757, database is CAplus.

Three polymer donors named Qx-8F, Qx-10F, and Qx-12F, with similar chem. structures, were synthesized. The energy level of these donors is manipulated by precisely controlling the fluorination sites. We demonstrate that the exciton dissociation efficiency is gradually enhanced from Qx-8F:Y6 to Qx-12F:Y6, leading to improved open circuit voltage VOC and short circuit c.d. JSC for donors with a higher degree of fluorination. Simultaneously, the trap-assisted recombination or bimol. recombination intensity is reduced, while the extraction rate is enhanced because of increased charge carrier mobilities, leading to an increase in fill factor for donors with higher amount of fluorine atoms. The optimized device based on Qx-12F with the most fluorine atoms and the non-fullerene acceptor Y6 shows the highest power conversion efficiency of 15.21%, with a VOC of 0.85 V, JSC of 24.55 mA cm-2, and fill factor of 72.88%. It is further demonstrated that the optimized ternary device based on the Qx-12F:PM6:Y6 blend provides a power conversion efficiency of 16.32%.

Journal of Materials Chemistry A: Materials for Energy and Sustainability 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 C65H82N2O18S2, Formula: C6HBrF4O.

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

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