Author: Jessica.F

Kato, Kahoko; Deng, Dian; Kita, Yusuke; Kamata, Keigo; Hara, Michikazu published the artcile< Primary amine synthesis by hydrogen-involving reactions over heterogeneous cobalt catalysts>, Reference of 3959-07-7, the main research area is primary amine selective preparation; nitrile hydrogenation cobalt catalyst; carbonyl compound reductive amination cobalt catalyst.

A composite of metallic cobalt and silica particles that exhibits high catalytic performance for the selective synthesis of primary amines RNH2 [R = heptyl, cyclohexyl, Bn, [5-(hydroxymethyl)oxolan-2-yl]methyl, etc.] via hydrogenation of nitriles RCN and reductive amination, even under mild conditions was reported. A mechanistic study revealed that the substrate nitrile and the product amine retarded the hydrogenation of secondary imine intermediates, which resulted in a selective reaction. On the basis of this knowledge, the selectivity for the primary amine was further improved by the addition of coordinating organic mols., which provided new insights into the control of selectivity toward primary amines unlike that with classical methods using ammonia.

Catalysis Science & Technology published new progress about Carbonyl compounds (organic) Role: RCT (Reactant), RACT (Reactant or Reagent). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Reference of 3959-07-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Jin, Sen; Wang, Hui; Li, Lei; Luo, Xiao; Sun, Xianshun; Zuo, Ming; Tian, Jie; Zhang, Xiaodong; Xie, Yi published the artcile< Surface modification boosts exciton extraction in confined layered structure for selective oxidation reaction>, Computed Properties of 3959-07-7, the main research area is exciton extraction layered structure selective oxidation reaction surface modification.

Extracting photogenerated species from bulk to surface is an essential process for gaining efficient semiconductor-based photocatalysis. However, compared with charged photogenerated carriers, neutral exciton exhibits negligible response to elec. field. Accordingly, traditional strategies involving band-alignment construction for boosting directional transfer of charge carriers are impracticable for extracting bulk excitons. To this issue, we here propose that the extraction of bulk exciton could be effectively implemented by surface modification. By taking confined layered bismuth oxycarbonate (Bi2O2CO3) as an example, we highlight that the incorporation of iodine atoms on the surface could modify the micro-region electronic structure and hence lead to reduced energy of surface excitonic states. Benefiting from the energy gradient between bulk and surface excitonic states, iodine-modified Bi2O2CO3 possesses high-efficiency bulk exciton extraction, and hence exhibits promoted performance in triggering 1O2-mediated selective oxidation reaction. This work presents the pos. role of surface modification in regulating excitonic processes of semiconductor-based photocatalysts.

Science China: Chemistry published new progress about Absorption spectra. 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

Li, Zhen; Huang, Meirong; Zhang, Xinhao; Chen, Jiean; Huang, Yong published the artcile< N-Heterocyclic Carbene-Catalyzed Four-Component Reaction: Chemoselective Cradical-Cradical Relay Coupling Involving the Homoenolate Intermediate>, Application In Synthesis of 3893-18-3, the main research area is beta tertiary gamma quaternary carboxylic acid chemoselective preparation; enal olefin nucleophile Togni reagent multicomponent relay coupling organocatalyst.

An organocatalytic four-component relay radical coupling to access a broad spectrum of β-tertiary-γ-quaternary carboxylic acid derivatives I [R = Ph, 4-MeC6H4, 2-thienyl, etc.; R1 = H, Ph, 4-BrC6H4, etc.; R2 = Et, Ph, 2-furyl, etc.; R3 = OMe, OEt, HNCH2C6H5, etc.] using simple reagents was reported. This strategy was complementary to the classical closed-shell synthetic approaches and was particularly effective in introducing a quaternary carbon substituent at β-carbon. Mechanistically, relay radical coupling involving N-heterocyclic carbene-derived homoenolates was challenging due to issues associated with site-selectivity and catalyst turnover. In this report, demonstrated high site control using a triazolium N-heterocyclic carbene catalyst and a transient acyl trapping strategy to prepare diversified carboxylic acid derivatives in a single pot.

ACS Catalysis published new progress about Alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Application In Synthesis of 3893-18-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Auti, Prashant S.; Nandi, Arijit; Kumari, Vijeta; Paul, Atish T. published the artcile< Design, synthesis, biological evaluation and molecular modelling studies of oxoacetamide warhead containing indole-quinazolinone based novel hybrid analogues as potential pancreatic lipase inhibitors>, Category: bromides-buliding-blocks, the main research area is obesity indole quinazolinone mol modeling pancreatic lipase inhibitor antiobesity.

A novel series of indolyl oxoacetamide-quinazolinone hybrid analogs (9aa-9df) were designed, synthesized, and evaluated for their in vitro pancreatic lipase (PL) inhibitory potential which may lead to efficient anti-obesity agents. All the synthesized hybrid analogs exhibited moderate to potent PL inhibitory activity (IC50 = 32.51 to 4.86 μM). Among all the analogs, 9ak, 9af, 9aj, and 9ah were found to have the most potent PL inhibitory activity (IC50 = 4.86, 5.73, 5.83, and 5.94 μM resp.), as compared to orlistat (IC50 = 0.86 μM). The most potent analogs 9af and 9ak were found to inhibit PL competitively with an inhibition constant (Ki) of 2.136, 1.648 μM. Furthermore, the docking study confirmed the binding of analogs 9ak and 9af (MolDock score of -161.25, -133.67 kcal mol-1) that exhibited docking interactions with important active site amino acids, namely Phe 77, Tyr 114, Ser 152, Arg 256, His 263, etc. Also, the anal. of analog 9ak and 9af in SeeSAR revealed the covalent inhibition of PL. In mol. dynamics simulations of 100 ns, the complex between each analog (9ak & 9af) and PL was found to be stable (RMSD < 1.5 Å). The present work highlights the importance of a hybrid drug design approach for the development of indole and quinazolinone containing hybrids as potential PL inhibitors. New Journal of Chemistry published new progress about Antiobesity agents. 20776-50-5 belongs to class bromides-buliding-blocks, and the molecular formula is C7H6BrNO2, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Xuan, Yi-ning; Chen, Zhen-yu; Yan, Ming published the artcile< An organocatalytic cascade reaction of 2-nitrocyclohexanone and α,β-unsaturated aldehydes with unusual regioselectivity>, Name: 3-(4-Bromophenyl)acrylaldehyde, the main research area is nitrocyclohexanone aldehyde unsaturated organocatalyst conjugate addition Henry reaction; nonanone bicyclo stereoselective preparation.

An organocatalytic cascade reaction of 2-nitrocyclohexanone and α,β-unsaturated aldehydes was developed. Bicyclo[3.3.1]nonanone products, e.g., I, were obtained with good yields and excellent enantioselectivities. The reaction occurred with unusual regioselectivity. A dienolate-iminium activation mechanism was proposed. The products were transformed to eight-membered cyclic ketones, e.g., II, with high enantioselectivity.

Chemical Communications (Cambridge, United Kingdom) published new progress about Bicyclic compounds, ketones Role: SPN (Synthetic Preparation), PREP (Preparation). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Name: 3-(4-Bromophenyl)acrylaldehyde.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kraszewski, Karol; Tomczyk, Ireneusz; Drabinska, Aneta; Bienkowski, Krzysztof; Solarska, Renata; Kalek, Marcin published the artcile< Mechanism of Iodine(III)-Promoted Oxidative Dearomatizing Hydroxylation of Phenols: Evidence for a Radical-Chain Pathway>, Synthetic Route of 1530-33-2, the main research area is phenol iodine oxidative dearomatization kinetics mechanism; hypervalent iodine; mechanistic investigations; phenol dearomatization; radical-chain pathway; synthetic methods.

The oxidative dearomatization of phenols with the addition of nucleophiles to the aromatic ring induced by hypervalent iodine(III) reagents and catalysts has emerged as a highly useful synthetic approach. However, exptl. mechanistic studies of this important process have been extremely scarce. In this report, we describe systematic investigations of the dearomatizing hydroxylation of phenols using an array of exptl. techniques. Kinetics, EPR spectroscopy, and reactions with radical probes demonstrate that the transformation proceeds by a radical-chain mechanism, with a phenoxyl radical being the key chain-carrying intermediate. Moreover, UV and NMR spectroscopy, high-resolution mass spectrometry, and cyclic voltammetry show that before reacting with the phenoxyl radical, the water mol. becomes activated by the interaction with the iodine(III) center, causing the Umpolung of this formally nucleophilic substrate. The radical-chain mechanism allows the rationalization of all existing observations regarding the iodine(III)-promoted oxidative dearomatization of phenols.

Chemistry – A European Journal published new progress about Activation entropy. 1530-33-2 belongs to class bromides-buliding-blocks, and the molecular formula is C21H22BrP, Synthetic Route of 1530-33-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Rong, Nianxin; Yuan, Yongsheng; Chen, Huijie; Yao, Changguang; Li, Teng; Wang, Yantao; Yang, Weiran published the artcile< A practical route to 2-iodoanilines via the transition-metal-free and base-free decarboxylative iodination of anthranilic acids under oxygen>, Related Products of 20776-50-5, the main research area is iodoaniline regioselective preparation; anthranilic acid oxygen decarboxylative iodination.

A simple and practical procedure for synthesizing 2-iodoanilines ArNH2 [Ar = 2-IC6H4, 2-I-4-BrC6H3, 2-I-4-MeOC6H3, etc.] had been developed. A series of highly regioselective 2-iodoanilines ArNH2 was obtained in satisfactory to good yields (of up to 90%) by carrying out the decarboxylative iodination of readily available anthranilic acids with inexpensive KI and I2 as halogen donors under transition-metal-free and base-free conditions. Oxygen was shown to be necessary for the transformation. This practical decarboxylative iodination route was operationally scalable and shown to exhibit high functional-group tolerance. Control experiments suggested that a radical pathway was involved in the transformation.

Organic Chemistry Frontiers published new progress about Aromatic amines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 20776-50-5 belongs to class bromides-buliding-blocks, and the molecular formula is C7H6BrNO2, Related Products of 20776-50-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Tianyu; Yang, Zhenkun; Zhou, Dapeng; Meng, Fuliang; Han, Zhengyu; Huang, Hai published the artcile< Non-metal Lewis acid-catalyzed cross-Claisen condensation for β-keto esters>, Safety of Ethyl 2-(3-bromophenyl)acetate, the main research area is alkoxy silyl ketene acetal keto ester Lewis acid catalyst; keto alkoxy ester cehmoselective preparation Claisen condensation.

A new catalytic and highly chemoselective cross-Claisen condensation of esters was disclosed. In the presence of TBSNTf2 as a non-metal Lewis acid, various esters can undergo cross-Claisen condensation to form β-keto esters which are important building blocks. Compared with the traditional Claisen condensation, this process, employing silyl ketene acetals (SKAs) as carbonic nucleophiles to achieve cross-Claisen condensation, requires mild conditions and has good tolerance of functional groups.

Organic & Biomolecular Chemistry published new progress about 1,3-Dicarbonyl compounds Role: SPN (Synthetic Preparation), PREP (Preparation). 14062-30-7 belongs to class bromides-buliding-blocks, and the molecular formula is C10H11BrO2, Safety of Ethyl 2-(3-bromophenyl)acetate.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Chacon-Huete, Franklin; Lasso, Juan David; Szavay, Paul; Covone, Jason; Forgione, Pat published the artcile< Synthesis of 2,5-diaryl nonsymmetric furans C6-platform chemicals via catalytic conversion of biomass and the formal synthesis of dantrolene>, HPLC of Formula: 401-78-5, the main research area is diarylfuran preparation biomass furancarboxylic acid decarboxylation arylation aryl bromide.

Biomass-derived commodity chem. 5-hydroxymethyl furfural is an underutilized C6-platform chem. derived from cellulose that is ideal to prepare next-generation value-added products. We have developed an efficient synthetic strategy to access 2,5-diaryl nonsym. furans from 5-hydroxymethyl furfural utilizing decarboxylative cross-couplings. A key finding was that the presence of the hydroxymethyl handle enhances the yields of the palladium-catalyzed decarboxylative cross-coupling reaction. The method provides access to a broad-range nonsym. 2,5-diaryl furans where each arene can be systematically introduced as required. Addnl., this green synthetic strategy was employed for a formal synthesis of the muscle relaxant Dantrolene in excellent yields.

Journal of Organic Chemistry published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 401-78-5 belongs to class bromides-buliding-blocks, and the molecular formula is C7H4BrF3, HPLC of Formula: 401-78-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Chen, Xu-Lin; Tao, Xiao-Dong; Wei, Zhuangzhuang; Meng, Lingyi; Lin, Fu-Lin; Zhang, Dong-Hai; Jing, Yan-Yun; Lu, Can-Zhong published the artcile< Thermally Activated Delayed Fluorescence Amorphous Molecular Materials for High-Performance Organic Light-Emitting Diodes>, HPLC of Formula: 576-83-0, the main research area is thermally activated delayed fluorescence amorphous mol material high performance; OLEDs; amorphous molecular materials; bimesitylene; film quality; stability; thermally activated delayed fluorescence.

Small-mol. thermally activated delayed fluorescence (TADF) materials have been extensively developed to actualize efficient organic LEDs (OLEDs). However, organic small mols. generally compromise thin film quality and stability due to the tendency of crystallization, aggregation, and phase separation, which hence degrade the efficiency and long-term stability of the OLEDs. Here, for the first time, we exploit the unique mol. configuration of the bimesitylene scaffold to design two highly efficient TADF amorphous mol. materials with excellent thermal and morphol. stabilities. The twisted and rigid bimesitylene scaffold thwarts regular mol. packing and crystallization, thereby guaranteeing homogeneous and stable amorphous thin films. Meanwhile, the highly twisted geometry of the bimesitylene scaffold efficiently breaks the mol. conjugation and thus conserves the high energies of the lowest locally excited triplet states (3LE) above the lowest charge transfer states (1CT and 3CT), leading to small singlet-triplet energy splitting and fast reverse intersystem crossing. These TADF emitters exhibit high photoluminescence quantum yields of 0.90 and 0.69 and short TADF lifetimes of 4.94 and 1.44μs in doped films, based on which the greenish-blue and greenish-yellow OLEDs achieve external quantum efficiencies of 23.2 and 16.2%, resp., with small efficiency roll-off rates and perfect color stability.

ACS Applied Materials & Interfaces published new progress about Crystallinity. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, HPLC of Formula: 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary