Tag: M.W=150-200

Zhang, Jingjing; Yang, Jin-Dong; Cheng, Jin-Pei published the artcile< Exploiting the radical reactivity of diazaphosphinanes in hydrodehalogenations and cascade cyclizations>, Synthetic Route of 576-83-0, the main research area is arene preparation; aryl bromide hydrodehalogenation bis tertbutyl diazaphosphinane mediated; dihydro indene preparation chemoselective; bromide aryl cascade cyclization bis tertbutyl diazaphosphinane mediated.

Radical reactivity of diazaphosphinanes to implement hydrodehalogenations of aryl bromides and their cascade cyclization by hydride transfer was reported to give aromatic hydrocarbons R-H [R = Ph, 2-naphthyl, 4-MeOC6H4, etc.] and dihydro-indene derivatives I [X = NH, O, S]. These reactions featured a broad substrate scope, high efficiency and simplicity of manipulation. The radical reactivity of diazaphosphinanes disclosed here differed from their well-established hydridic reactivity and hence opened a new avenue for diazaphosphinane applications in organic syntheses.

Chemical Science published new progress about Aromatic hydrocarbons Role: SPN (Synthetic Preparation), PREP (Preparation). 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

Arikawa, Shinobu; Shimizu, Akihiro; Shiomi, Daisuke; Sato, Kazunobu; Shintani, Ryo published the artcile< Synthesis and Isolation of a Kinetically Stabilized Crystalline Triangulene>, Quality Control of 576-83-0, the main research area is preparation mesityl substituted triangulene crystal structure triplet ground state.

The synthesis and isolation of hydrocarbons with a triplet ground state in crystalline forms have been sought in materials science. Triangulene is one of the most famous triplet-ground-state benzenoid hydrocarbons. Its unique electronic structure and highly sym. structure have prompted many scientists to synthesize and isolate triangulene and its derivatives, but all attempts so far to isolate them as crystals have been unsuccessful. Herein we report the synthesis and isolation of a kinetically stabilized crystalline triangulene for the first time. The key to success is the introduction of bulky substituents onto the reactive zigzag edges. Its highly sym. structure was confirmed by X-ray crystallog., and its fundamental properties, including the triplet ground state, were revealed. The achievement here will open the door for the synthesis and isolation of other hydrocarbons with higher spin multiplicity.

Journal of the American Chemical Society published new progress about Aromaticity. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Quality Control of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Shao, Ling-Yan; Xu, Zhi; Wang, Cun-Ying; Fu, Xiao-Pan; Chen, Miao-Miao; Liu, Hong-Wei; Ji, Ya-Fei published the artcile< Palladium-catalyzed direct mono-aroylation of O-arylmethyl and aryl-substituted acetoxime ethers>, Category: bromides-buliding-blocks, the main research area is ketone preparation regioselective; arylmethyl aryl acetoxime ether aromatic aldehyde aroylation palladium catalyst.

An efficient palladium-catalyzed ortho-aroylation of O-arylmethyl and aryl-substituted acetoxime ethers has been developed; this method has high mono-site selectivity and does not require exogenous ligands. Under the direction of a simple exo-acetoxime auxiliary, a broad scope of masked arylmethyl alcs. and phenols as well as various aromatic aldehydes are compatible with this transformation, which probably follows a mechanistic pathway involving a six- or five-membered exo-cyclopalladated intermediate. The strategy can be expediently adopted to prepare synthetically valuable 1H-benzo[d][1,2]oxazines and benzo[d]isoxazoles. The directing group can be easily removed from the products to afford the functionalized diaryl ketones.

Organic & Biomolecular Chemistry published new progress about Aroylation (regioselective). 188813-04-9 belongs to class bromides-buliding-blocks, and the molecular formula is C8H7BrO, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Xia, Youfu; Du, Yanqing; Xiang, Qian; Humphrey, Mark G. published the artcile< Highly efficient room-temperature phosphorescent materials with a heavy-atom effect of bromine>, Synthetic Route of 576-83-0, the main research area is bromine carbazole phosphorescent material crystal packing.

Room-temperature phosphorescent (RTP) materials with long luminescence lifetimes have stimulated considerable interest. However, pure organic mols. with persistent room-temperature phosphorescence are still rarely reported. In this work, we study two mols., DCzMPh and TCzMPh, in which persistent room-temperature phosphorescence in the amorphous state is achieved via the heavy-atom effect of bromine atoms in their structure. Their final quantum yields are found to be as high as 90 and 93%, resp., at the phosphorescence lifetimes of 0.27 and 0.28 s, resp. Moreover, both mols. are shown to be appropriate for security protection applications.

New Journal of Chemistry published new progress about Crystal packing (particle). 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

Li, Xia; Lyu, Shaoshuai; Lang, Xianjun published the artcile< Superoxide generated by blue light photocatalysis of g-C3N4/TiO2 for selective conversion of amines>, Reference of 3959-07-7, the main research area is graphitic carbon nitride titanium dioxide amine superoxide photocatalysis; Amines; Photocatalysis; Selective aerobic oxidation; Superoxide; Visible light.

Reactive oxygen species (ROS) are remarkably reactive chem. oxygen-containing mols. that not only occupy critical positions in cell signaling and homeostasis for regulating aerobic living organism’s growth and development but also broadly participate in the environmental management as extraordinary oxidizing agents. Inspired by the behaviors of ROS, we designed an artful visible light photocatalytic system for the selective conversion of amines due to the activation of oxygen (O2) to superoxide (O2·-) over g-C3N4/TiO2. Here, blue light was manipulated as a light source to circumvent the initiation of the strong nonselective hydroxyl radical (·OH) that is often generated by valence band holes (hvb+) of TiO2. Aerial O2 was employed to achieve the long-lived, exclusive ROS, O2·-, while acetonitrile, an aprotic solvent, was utilized to prolong the lifetime of O2·-. Importantly, the g-C3N4/TiO2 possesses an exceptional capability for the generation of O2·-. Based on the synergistic effect of two ingredients of the g-C3N4/TiO2 photocatalyst, the highly selective conversion of amines was achieved with superior conversions in comparison with the pristine TiO2 and g-C3N4. Furthermore, a mechanism dominated by O·- was proposed according to the kinetic studies, ESR (EPR), and ROS quenching experiments This work highlights the importance of ROS in defining the desirable outcomes over semiconductor photocatalysts.

Environmental Research published new progress about Adsorption (isotherm). 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

Xue, Gaijun; Xie, Fukai; Liang, Hongliang; Chen, Guoliang; Dai, Wen published the artcile< Copper-Catalyzed Oxidative C-C Bond Cleavage of Alkyl-(Hetero)arenes Enabling Direct Access to Nitriles>, SDS of cas: 2725-82-8, the main research area is aryl nitrile preparation copper catalyst; alkyl hetero arene oxidative carbon bond cleavage cyanation.

The cleavage and functionalization of C-C bonds has emerged as a powerful tool for discovery of new transformations. Herein, authors report a protocol that enables direct synthesis of nitriles via copper-catalyzed oxidative cleavage and cyanation of C-C bonds in a wide variety of multicarbon alkyl-substituted (hetero)arenes. Detailed mechanistic studies reveal that a tandem oxidative process is involved in this transformation.

Organic Letters published new progress about Aromatic compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 2725-82-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H9Br, SDS of cas: 2725-82-8.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Lu, Ru-Qiang; Wu, Shuang; Yang, Lin-Lin; Gao, Wen-Bin; Qu, Hang; Wang, Xiao-Ye; Chen, Jun-Bo; Tang, Chun; Shi, Hai-Yan; Cao, Xiao-Yu published the artcile< Stable Diindeno-Fused Corannulene Regioisomers with Open-Shell Singlet Ground States and Large Diradical Characters>, Related Products of 576-83-0, the main research area is diindeno corannulene regioisomer singlet triplet diradical crystal structure; corannulene; macrocycles; polycycles; radicals; structure elucidation.

The synthesis of open-shell polycyclic hydrocarbons with large diradical characters is challenging because of their high reactivities. Herein, two diindeno-fused corannulene regioisomers DIC-1 and DIC-2, curved fragments of fullerene C104, were synthesized that exhibit open-shell singlet ground states. The incorporation of the curved and non-alternant corannulene moiety within diradical systems leads to significant diradical characters as high as 0.98 for DIC-1 and 0.89 for DIC-2. Such high diradical characters can presumably be ascribed to the re-aromatization of the corannulene π system. Although the DIC compounds have large diradical characters, they display excellent stability under ambient conditions. The half-lives are 37 days for DIC-1 and 6.6 days for DIC-2 in solution This work offers a new design strategy towards diradicaloids with large diradical characters yet maintain high stability.

Angewandte Chemie, International Edition published new progress about Acylation, regioselective. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Related Products of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Jingjing; Yang, Jin-Dong; Cheng, Jin-Pei published the artcile< Exploiting the radical reactivity of diazaphosphinanes in hydrodehalogenations and cascade cyclizations>, Synthetic Route of 576-83-0, the main research area is arene preparation; aryl bromide hydrodehalogenation bis tertbutyl diazaphosphinane mediated; dihydro indene preparation chemoselective; bromide aryl cascade cyclization bis tertbutyl diazaphosphinane mediated.

Radical reactivity of diazaphosphinanes to implement hydrodehalogenations of aryl bromides and their cascade cyclization by hydride transfer was reported to give aromatic hydrocarbons R-H [R = Ph, 2-naphthyl, 4-MeOC6H4, etc.] and dihydro-indene derivatives I [X = NH, O, S]. These reactions featured a broad substrate scope, high efficiency and simplicity of manipulation. The radical reactivity of diazaphosphinanes disclosed here differed from their well-established hydridic reactivity and hence opened a new avenue for diazaphosphinane applications in organic syntheses.

Chemical Science published new progress about Aromatic hydrocarbons Role: SPN (Synthetic Preparation), PREP (Preparation). 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

Arikawa, Shinobu; Shimizu, Akihiro; Shiomi, Daisuke; Sato, Kazunobu; Shintani, Ryo published the artcile< Synthesis and Isolation of a Kinetically Stabilized Crystalline Triangulene>, Quality Control of 576-83-0, the main research area is preparation mesityl substituted triangulene crystal structure triplet ground state.

The synthesis and isolation of hydrocarbons with a triplet ground state in crystalline forms have been sought in materials science. Triangulene is one of the most famous triplet-ground-state benzenoid hydrocarbons. Its unique electronic structure and highly sym. structure have prompted many scientists to synthesize and isolate triangulene and its derivatives, but all attempts so far to isolate them as crystals have been unsuccessful. Herein we report the synthesis and isolation of a kinetically stabilized crystalline triangulene for the first time. The key to success is the introduction of bulky substituents onto the reactive zigzag edges. Its highly sym. structure was confirmed by X-ray crystallog., and its fundamental properties, including the triplet ground state, were revealed. The achievement here will open the door for the synthesis and isolation of other hydrocarbons with higher spin multiplicity.

Journal of the American Chemical Society published new progress about Aromaticity. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Quality Control of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Shao, Ling-Yan; Xu, Zhi; Wang, Cun-Ying; Fu, Xiao-Pan; Chen, Miao-Miao; Liu, Hong-Wei; Ji, Ya-Fei published the artcile< Palladium-catalyzed direct mono-aroylation of O-arylmethyl and aryl-substituted acetoxime ethers>, Category: bromides-buliding-blocks, the main research area is ketone preparation regioselective; arylmethyl aryl acetoxime ether aromatic aldehyde aroylation palladium catalyst.

An efficient palladium-catalyzed ortho-aroylation of O-arylmethyl and aryl-substituted acetoxime ethers has been developed; this method has high mono-site selectivity and does not require exogenous ligands. Under the direction of a simple exo-acetoxime auxiliary, a broad scope of masked arylmethyl alcs. and phenols as well as various aromatic aldehydes are compatible with this transformation, which probably follows a mechanistic pathway involving a six- or five-membered exo-cyclopalladated intermediate. The strategy can be expediently adopted to prepare synthetically valuable 1H-benzo[d][1,2]oxazines and benzo[d]isoxazoles. The directing group can be easily removed from the products to afford the functionalized diaryl ketones.

Organic & Biomolecular Chemistry published new progress about Aroylation (regioselective). 188813-04-9 belongs to class bromides-buliding-blocks, and the molecular formula is C8H7BrO, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary