Month: November 2022

Bao, Rui-Peng published the artcileIr(III)-Catalyzed Mono-Olefination of Aryl C-H Bonds Using -SCF₃ as a Weak Directing Group, Category: bromides-buliding-blocks, the publication is Organic Letters (2019), 21(19), 8116-8121, database is CAplus and MEDLINE.

The trifluoromethylthionyl group (-SCF₃) is an efficient weak directing group for Ir(III)-catalyzed aryl C-H olefination. Various trifluoromethylthioethers provide high levels of mono-olefination products in good to excellent yields under mild conditions with a 2,2′-bipyridine ligand or AgBF₄ as an additive. Mechanistic studies indicate the C-H cleavage is the rate-determining step. The directing group ability of the -SCF₃ group is benchmarked against several other weak directing groups by competition experiments under Ir(III)-catalyzed conditions.

Organic Letters 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, Category: bromides-buliding-blocks.

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

Lee, Yi-Huan published the artcileCo-crystallization phase transformations in all π-conjugated block copolymers with different main-chain moieties, Formula: C12H19BrS, the publication is Nanoscale (2014), 6(10), 5208-5216, database is CAplus and MEDLINE.

Driven by mol. affinity and balance in the crystallization kinetics, the ability to co-crystallize dissimilar yet self-crystallizable blocks of a block copolymer (BCP) into a uniform domain may strongly affect its phase diagram. In this study, we synthesize a new series of crystalline and monodisperse all-π-conjugated poly(2,5-dihexyloxy-p-phenylene)-b-poly(3-(2-ethylhexyl)thiophene) (PPP-P3EHT) BCPs and investigate this multi-crystallization effect. Despite vastly different side-chain and main-chain structures, PPP and P3EHT blocks are able to co-crystallize into a single uniform domain comprising PPP and P3EHT main-chains with mutually interdigitated side-chains spaced in-between. With increasing P3EHT fraction, PPP-P3EHTs undergo sequential phase transitions and form hierarchical superstructures including predominately PPP nanofibrils, co-crystalline nanofibrils, a bilayer co-crystalline/pure P3EHT lamellar structure, a microphase-separated bilayer PPP-P3EHT lamellar structure, and finally P3EHT nanofibrils. In particular, the presence of the new co-crystalline lamellar structure is the manifestation of the interaction balance between self-crystallization and co-crystallization of the dissimilar polymers on the resulting nanostructure of the BCP. The current study demonstrates the co-crystallization nature of all-conjugated BCPs with different main-chain moieties and may provide new guidelines for the organization of π-conjugated BCPs for future optoelectronic applications.

Nanoscale 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

Shen, Xingxing published the artcileSynthesis of thienoselenadiazole-containing conjugated copolymers and their application in polymer solar cells, SDS of cas: 52431-30-8, the publication is Polymer Journal (Tokyo, Japan) (2012), 44(9), 978-981, database is CAplus.

We have successfully synthesized the thienoselenadiazole unit through the condensation reaction between thiophene diamine and SeO₂ and applied the thienoselenadiazole unit for D-A-conjugated polymers. The thienoselenadiazole-based polymers exhibit good solubility in common organic solvents, good thermal stability, and deep HOMO levels. The solar cells based on thienoselenadiazole-containing polymers gave high open-circuit voltage. Further improving of the light-absorption properties of the thienoselenadiazole-containing polymers to achieve high short-circuit c.d. and high power conversion efficiency is currently underway.

Polymer Journal (Tokyo, Japan) 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 C9H7NO2, SDS of cas: 52431-30-8.

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

Chen, Wu published the artcileSynthesis and fungicidal evaluation of novel 1,2,4-triazolo[1,5-a]pyrimidine containing oxadiazolyl derivatives, Category: bromides-buliding-blocks, the publication is Youji Huaxue (2005), 25(11), 1477-1481, database is CAplus.

Reaction of 2-[[[(hydrazino)carbonyl]methyl]thio]-5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine with carbon disulfide in refluxing ethanol afforded 2-(5-mercapto-1,3,4-oxadiazol-2-ylmethylthio)-5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine, which was then treated with various benzyl halide derivatives in basic condition to yield 17 novel biheterocyclic derivatives The target compounds thus prepared were derivatives of 5,7-dimethyl-2-[[[5-[(phenylmethyl)thio]-1,3,4-oxadiazol-2-yl]methyl]thio][1,2,4]triazolo[1,5-a]pyrimidine. The structures of all compounds obtained were confirmed by elemental analyses, ¹H NMR and MS. Preliminary bioassay indicates that some compounds display antibacterial (sic) activity to certain extent. The target compounds thus prepared were evaluated for their activity against plant fungi, such as Gibberella zeae, Pellicularia filamentosa sasakii, Physalospora piricola, Whetzelinia sclerotiorum, etc.

Youji Huaxue published new progress about 76283-09-5. 76283-09-5 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzyl bromide,Benzene, name is 4-Bromo-1-(bromomethyl)-2-fluorobenzene, and the molecular formula is C7H5Br2F, Category: bromides-buliding-blocks.

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

Dieter, R. Karl published the artcileAsymmetric Synthesis of Enantioenriched (+)-Elaeokanine A, Application In Synthesis of 69361-41-7, the publication is Journal of Organic Chemistry (2006), 71(15), 5674-5678, database is CAplus and MEDLINE.

The key transformation in the total synthesis of (+)-elaeokanine A (I, R = COCH₂Et) was accomplished by asym. deprotonation of N-Boc pyrrolidine, followed by the reaction of the in situ generated enantioenriched stereogenic cuprate reagent with (E)-4-bromo-1-iodo-1-trimethylsilyl-1-butene with retention of configuration. N-Boc deprotection, followed by a one-pot olefin isomerization and intramol. amine alkylation afforded bicyclic vinyl bromide I (R = Br) that was converted into (+)-elaeokanine A by sequential halogen metal exchange and reaction of the organolithium reagent with N-butanoylmorpholine.

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, Application In Synthesis of 69361-41-7.

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

Yang, Zequn published the artcileTetrahydroxydiboron and Nickel Chloride Cocatalyzed Rapid Radical Cyclization toward Pyrrolizidine and Indolizidine Alkaloids, Formula: C4H6BrFO2, the publication is Journal of Organic Chemistry, database is CAplus and MEDLINE.

A novel tetrahydroxydiboron and nickel chloride cocatalyzed radical cyclization cascade with a broad substrate scope and an ultrashort reaction time was developed. The mechanistic investigation indicated that the reaction might involve a homo cleavage of tetrahydroxydiboron and nickel hydride intermediates. This approach enables the simple and efficient synthesis of a series of heteropolycycles.

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 C12H14BNO2, Formula: C4H6BrFO2.

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

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