Category: bromides-buliding-blocks

Kropp, Paul J. published the artcileSurface-Mediated Reactions. 4. Hydrohalogenation of Alkynes, COA of Formula: C6H12Br2, the publication is Journal of Organic Chemistry (1994), 59(11), 3102-12, database is CAplus.

The use of appropriately prepared silica gel and alumina has been found to mediate the addition of hydrogen halides to alkynes. The technique has been rendered even more convenient by the use of various organic and inorganic acid halides that react in the presence of silica gel or alumina to generate hydrogen halides in situ. Treatment in this fashion of 1-propynylbenzene (1), which underwent no reaction in CH₂Cl₂ solution saturated with HCl, readily afforded the syn addition product alkenyl chloride (E)-PhCX:CHMe, [(E)-4, X = Cl]. On extended treatment (E)-4 (X = Cl) underwent subsequent isomerization to the thermodynamically more stable Z isomer. In a similar way bromides (E)- and (Z)-4 (X = Br) were obtained without competing formation of the radical products (E)- and (Z)-PhCH:CMeBr, which occurred in solution In contrast with slow solution-phase hydriodination of alkyne 1, surface-mediated addition readily afforded (E)-4 (X = I), followed by isomerization to the Z isomer. Equilibration E ⇌ Z of the alkenyl halides 4 was shown to involve, at least in part, addition-elimination via the gem-dihalides PhCX₂Et. Analogous behavior was exhibited by the phenylalkynes PhCCPh and PhCCCMe₃ on surface-mediated hydrohalogenation. Surface-mediated addition of HBr and HI to the internal alkylalkyne PrCCPr afforded principally the anti addition products (Z)-PrCX:CHPr. Treatment of the terminal alkynes BuCH₂CCH and Me₃CCCH with (COBr)₂ over alumina gave the dibromides, whereas use of acetyl bromide as the HBr precursor afforded the alkenyl bromides.

Journal of Organic 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, COA of Formula: C6H12Br2.

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

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

Ding, Yahui published the artcileIdentification of a small molecule as inducer of ferroptosis and apoptosis through ubiquitination of GPX4 in triple negative breast cancer cells, Name: 7-Bromohept-1-yne, the publication is Journal of Hematology & Oncology (2021), 14(1), 19, database is CAplus and MEDLINE.

TNBC is the most aggressive breast cancer with higher recurrence and mortality rate than other types of breast cancer. There is an urgent need for identification of therapeutic agents with unique mode of action for overcoming current challenges in TNBC treatment. Different inhibitors were used to study the cell death manner of DMOCPTL. RNA silencing was used to evaluate the functions of GPX4 in ferroptosis and apoptosis of TNBC cells and functions of EGR1 in apoptosis. Immunohistochem. assay of tissue microarray were used for investigating correlation of GPX4 and EGR1 with TNBC. Computer-aided docking and small mol. probe were used for study the binding of DMOCPTL with GPX4. DMOCPTL, a derivative of natural product parthenolide, exhibited about 15-fold improvement comparing to that of the parent compound PTL for TNBC cells. The cell death manner assay showed that the anti-TNBC effect of DMOCPTL mainly by inducing ferroptosis and apoptosis through ubiquitination of GPX4. The probe of DMOCPTL assay indicated that DMOCPTL induced GPX4 ubiquitination by directly binding to GPX4 protein. To the best of our knowledge, this is the first report of inducing ferroptosis through ubiquitination of GPX4. Moreover, the mechanism of GPX4 regulation of apoptosis is still obscure. Here, we firstly reveal that GPX4 regulated mitochondria-mediated apoptosis through regulation of EGR1 in TNBC cells. Compound 13, the prodrug of DMOCPTL, effectively inhibited the growth of breast tumor and prolonged the lifespan of mice in vivo, and no obvious toxicity was observed These findings firstly revealed novel manner to induce ferroptosis through ubiquitination of GPX4 and provided mechanism for GPX4 inducing mitochondria-mediated apoptosis through up-regulation of EGR1 in TNBC cells. Moreover, compound 13 deserves further studies as a lead compound with novel mode of action for ultimate discovery of effective anti-TNBC drug.

Journal of Hematology & Oncology published new progress about 81216-14-0. 81216-14-0 belongs to bromides-buliding-blocks, auxiliary class Linker,PROTAC Linker, name is 7-Bromohept-1-yne, and the molecular formula is C7H11Br, Name: 7-Bromohept-1-yne.

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

Zhang, Shuzhen published the artcileEffect of C7 modifications on benzothiadiazine-1,1-dioxide derivatives on their inhibitory activity and selectivity toward aldose reductase, HPLC of Formula: 76283-09-5, the publication is ChemMedChem (2013), 8(4), 603-613, database is CAplus and MEDLINE.

The development and progression of chronic complications in diabetic patients, such as retinopathy, nephropathy, neuropathy, cataracts, and stroke, are related to the activation and/or overexpression of aldose reductase (ALR2), which is a member of the aldo-keto reductase superfamily. A structure-activity relationship study focused on the C7 position of 1,2,4-benzothiadiazine-1,1-dioxide derivatives was pursued in an attempt to discover ALR2 inhibitors with enhanced potency and selectivity. These studies led to a series of new C7-substituted compounds, which were evaluated for their inhibitory activity against ALR2; they exhibited IC₅₀ values in the range of 2.80-45.13 nM. Two compounds with a C7-dimethylcarbamoyl and a C7-diethylcarbamoyl substituent, resp., were found to be the most active and presented excellent selectivity for ALR2 over aldehyde reductase (ALR1). The structure-activity relationship analyses and mol. modeling studies presented herein highlight the importance of hydrophobic and bulky groups at the C7 position for inhibitory activity and selectivity toward ALR2.

ChemMedChem 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 C6H9N3, HPLC of Formula: 76283-09-5.

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

Marks, Adam published the artcileSynthetic Nuances to Maximize n-Type Organic Electrochemical Transistor and Thermoelectric Performance in Fused Lactam Polymers, SDS of cas: 111-83-1, the publication is Journal of the American Chemical Society (2022), 144(10), 4642-4656, database is CAplus and MEDLINE.

A series of fully fused n-type mixed conduction lactam polymers p(g₇NC_nN), systematically increasing the alkyl side chain content, are synthesized via an inexpensive, nontoxic, precious-metal-free aldol polycondensation. Employing these polymers as channel materials in organic electrochem. transistors (OECTs) affords state-of-the-art n-type performance with p(g₇NC₁₀N) recording an OECT electron mobility of 1.20 x 10^-2 cm² V^-1 s^-1 and a μC* figure of merit of 1.83 F cm^-1 V^-1 s^-1. In parallel to high OECT performance, upon solution doping with (4-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)phenyl)dimethylamine (N-DMBI), the highest thermoelec. performance is observed for p(g₇NC₄N), with a maximum elec. conductivity of 7.67 S cm^-1 and a power factor of 10.4 μW m^-1 K^-2. These results are among the highest reported for n-type polymers. Importantly, while this series of fused polylactam organic mixed ionic-electronic conductors (OMIECs) highlights that synthetic mol. design strategies to bolster OECT performance can be translated to also achieve high organic thermoelec. (OTE) performance, a nuanced synthetic approach must be used to optimize performance. Herein, we outline the performance metrics and provide new insights into the mol. design guidelines for the next generation of high-performance n-type materials for mixed conduction applications, presenting for the first time the results of a single polymer series within both OECT and OTE applications.

Journal of the American Chemical Society 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, SDS of cas: 111-83-1.

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

Lei, Ming published the artcileHomogeneous and Heterogeneous Pd-Catalyzed Selective C-P Activation and Transfer Hydrogenation for “Group-Substitution” Synthesis of Trivalent Phosphines, Synthetic Route of 143-15-7, the publication is Organic Letters (2022), 24(15), 2868-2872, database is CAplus and MEDLINE.

A group-substitution synthesis of trivalent phosphines via a C-P activation of phosphonium salts is reported. The alkyl groups were introduced by alkylation of phosphines to form phosphonium salts. The de-arylation of phosphonium salts was achieved by C-P activation and transfer hydrogenation with homogeneous or heterogeneous Pd (0) catalysts. With this method, trivalent phosphines were prepared from com. available triarylphosphines. A chiral monophosphine ligand could be prepared from BINAP in a de-phosphination process.

Organic Letters 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, Synthetic Route of 143-15-7.

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

Sun, Pengfei published the artcileThienothiadiazole-Based NIR-II Dyes with D-A-D Structure for NIR-II Fluorescence Imaging Systems, COA of Formula: C4Br2N2O4S, the publication is ACS Applied Bio Materials (2021), 4(5), 4542-4548, database is CAplus and MEDLINE.

Fluorescence imaging (FI) in the second near-IR optical window (NIR-II, 1000-1700 nm) has received increasing focus due to its capacity of high spatiotemporal resolution, rapid real-time imaging, and deep penetration depth. In addition, D-A-D-based organic small mols. have also attracted wide attention due to their designed chem. structure and rapid renal metabolism However, most of the fluorescent cores were based on benzobisthiadiazole (BBTD) and 6,7-diphenyl-[1,2,5]thiadiazolo[3,4-g]quinoxaline (TTQ). The design and development of fluorescent core still remain challenging. Therefore, two NIR-II dyes based on the acceptor 4,6-di(2-thienyl)thieno[3,4-c][1,2,5]thiadiazole (TTDT) were designed and developed with donors tributyl(5-(9,9-dioctyl-9H-fluoren-2-yl)thiophen-2-yl)stannane (TF) and (5-(9,9′-spirobi[fluoren]-2-yl)thiophen-2-yl)tributylstannane (TSF) by the Stille coupling reaction, resp. Subsequently, the corresponding nanoparticles were prepared, and then TTDT-TF-based nanoparticles with superior photostability and strong NIR-II fluorescence signals were chosen for NIR-II FI. More importantly, the in vivo experiments suggested that TTDT-TF NPs exhibited significant accumulation at tumor sites and high signal-to-background ratio (SBR). The two D-A-D-type fluorophores based on TTDT have potential for NIR-II FI with superior imaging quality and imaging-guided surgery or therapy.

ACS Applied Bio Materials 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 C19H17N3O, COA of Formula: C4Br2N2O4S.

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

Saha, Subhadeep published the artcileCoordination cage-based emulsifiers: templated formation of metal oxide microcapsules monitored by in situ LC-TEM, Synthetic Route of 143-15-7, the publication is Chemistry – A European Journal (2022), 28(5), e202103406, database is CAplus and MEDLINE.

Metallo-supramol. self-assembly has yielded a plethora of discrete nanosystems, many of which show competence in capturing guests and catalyzing chem. reactions. However, the potential of low-mol. bottom-up self-assemblies in the development of structured inorganic materials has rarely been methodically explored so far. Herein, we present a new type of metallo-supramol. surfactant with the ability to stabilize non-aqueous emulsions for a significant period. The mol. design of the surfactant is based on a heteroleptic coordination cage (CGA-3; CGA=Cage-based Gemini Amphiphile), assembled from two pairs of organic building blocks, grouped around two Pd(II) cations. Shape-complementarity between the differently functionalized components generates discrete amphiphiles with a tailor-made polarity profile, able to stabilize non-aqueous emulsions, such as hexadecane-in-DMSO. These emulsions were used as a medium for the synthesis of spherical metal oxide microcapsules (titanium oxide, zirconium oxide, and niobium oxide) from soluble, water-sensitive alkoxide precursors by allowing a controlled dosage of water to the liquid-liquid phase boundary. Synthesized materials were analyzed by a combination of electron microscopic techniques. In situ liquid cell transmission electron microscopy (LC-TEM) was utilized for the first time to visualize the dynamics of the emulsion-templated formation of hollow inorganic titanium oxide and zirconium oxide microspheres.

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, Synthetic Route of 143-15-7.

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

Zhou, Xinlian published the artcilePigeon egg white protein-based transparent durable hydrogel via monodisperse ionic surfactant-mediated protein condensation, Product Details of C12H25Br, the publication is Scientific Reports (2022), 12(1), 4633, database is CAplus and MEDLINE.

The thermal gelation property of proteins is useful in creating protein-based materials. The gelation of protein solution often proceeds by the random aggregation of denatured proteins, and the protein-based gels are typically brittle or opaque, or both. Improvement in the mech. and optical properties of protein-based materials are required for them to be practical and functional. This study investigated pigeon egg white, which is semitransparent in its thermally gelled state, as a protein source for creating hydrogel materials. The protein thermal gelation process was initiated from the orderly condensed state of proteins complexed with monodisperse ionic surfactants to suppress random aggregation. The resultant gel showed transparency in the visible light region and was not destroyed at 99% compression under 17.8 MPa compressive stress, 350-fold higher than the compressive fracture strength of typical boiled pigeon egg white. These results showed that durable transparent hydrogels could be fabricated by the rational combination of natural proteins and surfactants.

Scientific Reports 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 C8H5F3N4, Product Details of C12H25Br.

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