Category: bromides-buliding-blocks

Ma, Yuanyuan; Gao, Qianwen; Zhou, Lan; Liu, Shanshan; Cheng, Hong-Gang; Zhou, Qianghui published the artcile< Diversity-Oriented Synthesis of Flavones and Isoflavones via Palladium/Norbornene Cooperative Catalysis>, COA of Formula: C8H6BrFO2, the main research area is arylated chromone chemoselective preparation; iodochromone aryl bromide olefin Heck palladium catalyst norbornene; potassium trifluoroborate iodochromone aryl bromide Suzuki palladium catalyst norbornene; alkylating reagent potassium trifluoroborate iodochromone alkylation palladium catalyst norbornene.

Diversity-oriented synthesis of arylated chromones I [R = H, 6-F, 7-Cl, etc.; R1 = CH=CHC6H5, Ph, 2-thienyl, etc.; R2 = Me, 2-NO2C6H4, 2-CO2MeC6H4, etc.] from 3-iodochromones via palladium/norbornene cooperative catalysis was reported. The success of this research reliesd on the use of a unique bridge-head ester modified norbornene derivative as the mediator. Salient features of this include readily available starting materials regarding 3-iodochromones, ortho-C-H arylating and alkylating reagents and ipso-terminating reagents, broad substrate scope, good chemoselectivity, good step-economy and scalability. A large number of structurally diversified flavones, isoflavones and 2,3-diarylated chromones could be quickly prepared in a predictable manner. As showcased by the efficient formal synthesis of umbralisib, this chem. could be treated as another valuable addition to the toolbox of medicinal chemists.

Chinese Journal of Chemistry published new progress about Alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 6942-39-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H6BrFO2, COA of Formula: C8H6BrFO2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Chen, Lian-Mei; Zhao, Juan; Xia, An-Jie; Guo, Xiao-Qiang; Gan, Ya; Zhou, Chuang; Yang, Zai-Jun; Yang, Jun; Kang, Tai-Ran published the artcile< A base-promoted cascade reaction of α,β-unsaturated N-tosylhydrazones with o-hydroxybenzyl alcohols: highly regioselective synthesis of N-sec-alkylpyrazoles>, HPLC of Formula: 3893-18-3, the main research area is hydroxymethyl arylalc arylethenyl tosylhydrazone base tandem heterocyclization aza Michael; arylpyrazolylmethyl aryl alc preparation regioselective.

An efficient method for the synthesis of N-sec-alkylpyrazoles through a base-promoted cascade cyclization/Michael addition reaction of α,β-unsaturated N-tosylhydrazones with ortho-hydroxybenzyl alcs. was developed. The desired products containing di- or triaryl groups at the same carbon atom were afforded in good to excellent yields with excellent regioselectivities (>20 : 1). Moreover, a three-component reaction of ortho-hydroxybenzyl alcs., α,β-unsaturated N-tosylhydrazones and saturated N-tosylhydrazones also took place to afforded pyrazoles in good yields. This reaction offered a new route to triarylmethanes with a simple operation and was applicable for large-scale synthesis.

Organic & Biomolecular Chemistry published new progress about Alkylarenes Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, HPLC of Formula: 3893-18-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Qiao, Lulin; Zhang, An-An; Chen, Jingchao; Li, Gao-Wei; Gao, Yuan-Yuan; Fan, Baomin; Liu, Lantao published the artcile< Palladium-catalyzed disilylation of 2-bromoarylferrocenes: An efficient approach to 1-Trimethylsilyl-2-(2-trimethylsilylaryl)ferrocenes>, Quality Control of 51605-97-1, the main research area is crystal structure mol disilylated ferrocene preparation; palladium catalyst disilylation bromoaryl ferrocene mechanism.

An unprecedented method for the palladium-catalyzed disilylation of 2-bromoarylferrocenes with hexamethyldisilane has been developed. The catalytic cycle is initiated by oxidative addition of 2-bromoarylferrocenes to Pd(0), followed by C-H activation to form a reactive five-membered C,C-palladacycle. By using this protocol, a variety of disilylated ferrocene compounds were obtained in moderate to good yields.

Tetrahedron Letters published new progress about C-H bond activation. 51605-97-1 belongs to class bromides-buliding-blocks, and the molecular formula is C9H12BrN, Quality Control of 51605-97-1.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

He, Zhao-Quan; Zhou, Quan; Wu, Li; Chen, Ying-Chun published the artcile< Asymmetric organocatalytic tandem reaction to chiral pyrimidinone derivatives using urea as dinitrogen source>, Synthetic Route of 3893-18-3, the main research area is substituted pyrimidinone derivative asym preparation; urea unsaturated aldehyde cyclocondensation chiral amines.

A facile method for the asym. synthesis of pyrimidinone derivatives was developed via an organocatalytic tandem aza-Michael addition-hemiaminal formation-dehydroxylation reaction, using N,N’-dialkyloxyurea as dinitrogen source (up to 97% ee). The transformations of hemiaminal intermediates to pyrimidinones with more complex structures have been also investigated.

Advanced Synthesis & Catalysis published new progress about Amines, chiral Role: CAT (Catalyst Use), USES (Uses). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Synthetic Route of 3893-18-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Perez-Castillo, Yunierkis; Montes, Ricardo Carneiro; da Silva, Cecilia Rocha; Neto, Joao Batista de Andrade; Dias, Celidarque da Silva; Brunna Sucupira Duarte, Allana; Junior, Helio Vitoriano Nobre; de Sousa, Damiao Pergentino published the artcile< Antifungal Activity of N-(4-Halobenzyl)amides against Candida spp. and Molecular Modeling Studies>, SDS of cas: 3959-07-7, the main research area is Candida halobenzyl amide mol modeling antifungal activity; Candida auris; anticandidal drugs; antimicrobial activity; benzoic acid; candidiasis; cinnamic acid; fungi; molecular docking; natural products; plants.

Fungal infections remain a high-incidence worldwide health problem that is aggravated by limited therapeutic options and the emergence of drug-resistant strains. Cinnamic and benzoic acid amides have previously shown bioactivity against different species belonging to the Candida genus. Here, 20 cinnamic and benzoic acid amides were synthesized and tested for inhibition of C. krusei ATCC 14243 and C. parapsilosis ATCC 22019. Five compounds inhibited the Candida strains tested, with compound 16 (MIC = 7.8 μg/mL) producing stronger antifungal activity than fluconazole (MIC = 16 μg/mL) against C. krusei ATCC 14243. It was also tested against eight Candida strains, including five clin. strains resistant to fluconazole, and showed an inhibitory effect against all strains tested (MIC = 85.3-341.3 μg/mL). The MIC value against C. krusei ATCC 6258 was 85.3 mcg/mL, while against C. krusei ATCC 14243, it was 10.9 times smaller. This strain had greater sensitivity to the antifungal action of compound 16. The inhibition of C. krusei ATCC 14243 and C. parapsilosis ATCC 22019 was also achieved by compounds 2, 9, 12, 14 and 15. Computational experiments combining target fishing, mol. docking and mol. dynamics simulations were performed to study the potential mechanism of action of compound 16 against C. krusei. From these, a multi-target mechanism of action is proposed for this compound that involves proteins related to critical cellular processes such as the redox balance, kinases-mediated signaling, protein folding and cell wall synthesis. The modeling results might guide future experiments focusing on the wet-lab investigation of the mechanism of action of this series of compounds, as well as on the optimization of their inhibitory potency.

International Journal of Molecular Sciences published new progress about Candida albicans. 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, SDS of cas: 3959-07-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yakovenko, Georgiy G.; Yagodkina, Marta S.; Bol’but, Andriy V.; Shishkina, Svitlana V.; Vovk, Mykhailo V. published the artcile< Synthesis of new triazolo[1,5-b][2,4]benzodiazepines via tandem cyclization of o-(azidomethyl)benzoates with cyanoacetamides>, Electric Literature of 337536-14-8, the main research area is crystal mol structure bromo methylpiperazine benzo triazole diazepinone; tandem cyclization azidomethy benzoate cyanoacetamide; triazolo benzodiazepine preparation tandem cyclization.

Based on the tandem anionic cyclization of o-(azidomethyl)benzoates with 2-cyanoacetamides, an efficient synthetic route to the hitherto unknown heterocyclic system, triazolo[1,5-b][2,4]benzodiazepine, has been developed. The optimum reaction conditions have been found which provide 59-74% yields of target compounds Their structural determination has been performed by the IR, LCMS, and NMR spectral methods as well as by X-ray diffraction anal.

Monatshefte fuer Chemie published new progress about Active methylene compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 337536-14-8 belongs to class bromides-buliding-blocks, and the molecular formula is C9H8Br2O2, Electric Literature of 337536-14-8.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Takeda, Mitsumi; Maejima, Saki; Yamaguchi, Eiji; Itoh, Akichika published the artcile< Iodine-mediated direct α-amination of dimethyl methylmalonate using non-protected amines>, SDS of cas: 3959-07-7, the main research area is dimethyl methylmalonate amine iodine regioselective amination; alkylamino dimethyl methylmalonate preparation.

In this study, direct C-N bond formation was achieved via the reaction of a di-Me methylmalonate with various amines in the presence of mol. iodine to produce α-aminocarbonyl compounds This versatile methodol. of the α-amination of a carbonyl-containing compound involves the in situ iodination of the di-Me methylmalonate, thus promoting the formation of its enolate isomer, which then facilitates its nucleophilic substitution reaction with an amine. This strategy is highly practical and can be used in industry due to its requirement of only readily available reagents without any pre-preparation of the amines and other substrates.

Tetrahedron Letters published new progress about Amination, regioselective. 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, SDS of cas: 3959-07-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Leng, Haijun; Zhao, Qian; Mao, Qing; Liu, Shuaijiang; Luo, Menglan; Qin, Rui; Huang, Wei; Zhan, Gu published the artcile< NHC-catalysed retro-aldol/aldol cascade reaction enabling solvent-controlled stereodivergent synthesis of spirooxindoles>, Recommanded Product: 3-(4-Bromophenyl)acrylaldehyde, the main research area is spirocyclopentaneoxindole preparation diastereo enantioselective solvent controlled stereodivergent NHC catalyst; oxindole unsaturated aldehyde Michael retro aldol tandem reaction.

An N-heterocyclic carbene (NHC)-catalyzed retro-aldol/aldol cascade reaction of spirooxindole-based β-hydroxyaldehydes has been developed. The ring opening-closure process enables the diastereodivergent synthesis of spirocyclopentaneoxindole products I (R’ = Bn, allyl; R1 = H, 5-Me, 6-Br, etc.; R2 = C6H5, 4-MeC6H4, 4-FC6H4; R3 = C6H5, 4-MeC6H4, 3-FC6H4, etc.) and II with four consecutive stereocenters by simply changing the reaction solvents (THF or DCE). The Michael/aldol/retro-aldol/aldol sequential protocol allows the diastereodivergent synthesis of spirocyclopentaneoxindoles from 3-substituted oxindoles and α,β-unsaturated aldehydes under the relay catalysis of a chiral secondary amine and an NHC catalyst. Moreover, four stereoisomers of the product can be selectively provided by using different combinations of a chiral secondary amine and a solvent.

Chinese Chemical Letters published new progress about Aldol condensation. 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Recommanded Product: 3-(4-Bromophenyl)acrylaldehyde.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gupta, Priyanka; Siewert, Jan-Erik; Wellnitz, Tim; Fischer, Malte; Baumann, Wolgang; Beweries, Torsten; Hering-Junghans, Christian published the artcile< Reactivity of phospha-Wittig reagents towards NHCs and NHOs>, Synthetic Route of 576-83-0, the main research area is phosphaWittig reagent reaction heterocyclic carbene olefin; crystal structure carbene phosphinidene phosphinoimidazolylidene adduct; mol structure carbene phosphinidene phosphinoimidazolylidene adduct; optimized geometry carbene phosphinidene phosphinoimidazolylidene adduct DFT.

Phospha-Wittig reagents, RPPMe3 (R = Mes* 2,4,6-tBu3-C6H2; MesTer 2,6-(2,4,6-Me3C6H2)-C6H3; DipTer 2,6-(2,6-iPr2C6H3)-C6H3), can be considered as phosphine-stabilized phosphinidenes. PMe3 can be displaced by NHCs or NHOs. Phosphinidene-like reactivity results in a subsequent C(sp2)-H activation of the exocyclic CH2 group in NHOs. This concept was further extended to allyl-appended NHOs, which resulted in phosphine-substituted allyl species.

Dalton Transactions published new progress about Crystal structure. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Synthetic Route of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sheng, Wenlong; Shi, Ji-Long; Hao, Huimin; Li, Xia; Lang, Xianjun published the artcile< Polyimide-TiO2 hybrid photocatalysis: Visible light-promoted selective aerobic oxidation of amines>, Computed Properties of 3959-07-7, the main research area is visible light promoted selective aerobic oxidation amine; Polyimide titania hybrid photocatalysis.

Polyimides are a class of high-performance polymers with good thermal and chem. stability. One specific polyimide can be formed via thermal polymerization of melamine (MA) and pyromellitic dianhydride (PMDA) precursors. Herein, polyimide-TiO2 hybrids were straightforwardly synthesized with a mixture of MA, PMDA and TiO2 by annealing at 325 °C. The crystal phase of anatase TiO2 can be preserved and polyimide can be formed on the surface of TiO2 to enable visible light absorption and high sp. surface areas for the polyimide-TiO2 hybrid. Next, this polyimide-TiO2 hybrid as a photocatalyst were successfully applied for visible light-promoted selective aerobic oxidation of amines into imines under irradiation of 460 nm blue light-emitting diodes (LEDs). With 4 mol% of (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) as the co-catalyst, polyimide-TiO2 hybrid photocatalyst reached 8 times of that of pristine TiO2 for the selective aerobic oxidation of benzylamine. Overall, the cooperative photocatalysis of polyimide-TiO2 hybrid and TEMPO was demonstrably efficient for visible light-promoted selective oxidation of amines with aerial O2 as the oxidant. Moreover, by means of reactive oxygen species (ROS) quenching experiments and in-situ ESR spectroscopy, superoxide anion radical (O·-2) was certified as the crucial ROS in coupling polyimide-TiO2 hybrid photocatalysis and TEMPO catalysis. This work suggests that hybridization of metal oxide semiconductor with polymer like polyimides is viable to forge visible light photocatalysts.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Computed Properties of 3959-07-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary