Tag: M.W=150-200

Frogley, Benjamin J.; Hill, Anthony F.; Shang, Rong; Sharma, Manab; Willis, Anthony C. published the artcile< In Search of Fulminate Analogues: LnMCP:NR>, SDS of cas: 576-83-0, the main research area is carbyne iminophosphino molybdenum tungsten complex fulminate analog preparation; nucleophilic addition iminophosphino carbyne molybdenum tungsten complex; alkylidyne; binuclear; carbyne; fulminate; iminophosphane.

Nucleophilic addition reactions of molybdenum and tungsten iminophosphino-substituted carbyne complexes are explored. The “”CPNR”” ligand may be viewed as being isolobal with fulminate, CNO; however, attempts to prepare a complex of such a ligand resulted instead in a range of novel imino and aminophosphinocarbyne complexes. Metalation-phosphination of carbyne [MoCBr(CO)2(Tp*)] [Tp* = hydrotris(dimethylpyrazolyl)borate] with BuLi and ClP:NMes* (Mes* = 2,4,6-tBi3C6H2) afforded mixtures of the complexes [MoCPBuNHMes*(CO)2(Tp*)] and traces of the bimetallic products [Mo2[μ-C2P2O(NHMes)2](CO)4(Tp*)2] and [Mo2(μ-C2PNHMes)(CO)4(Tp*)2]. The reaction of [WCBr(CO)2(Tp*)] with BuLi and ClP:NMes* afforded predominantly the mononuclear carbyne [W[CP(:NMes*)Bu2](CO)2(Tp*)] and traces of the binuclear complex [W2(μ-C2PNHMes)(CO)4(Tp*)2] which is also obtained when tBuLi is used. Although not isolable, the intended complexes [MCPNMes*(CO)2(Tp*)] could be generated in situ and spectroscopically characterized via the reactions of the stannyl carbynes [MCSnBu3(CO)2(Tp*)] and ClP:NMes*. The preceding observations are mechanistically interpreted with reference to a computational interrogation of the model complex [MoCP:NMe(CO)2(Tp*)], the LUMO of which has considerable phosphorus character.

Chemistry – A European Journal published new progress about Carbyne complexes Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, SDS of cas: 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Umakoshi, Yuki; Takemoto, Yusuke; Tsubouchi, Akira; Zhdankin, Viktor V.; Yoshimura, Akira; Saito, Akio published the artcile< Dehydrogenative Cycloisomerization/Arylation Sequence of N-Propargyl Carboxamides with Arenes by Iodine(III)-Catalysis>, Quality Control of 576-83-0, the main research area is oxazole preparation; amide arene dehydrogenative cycloisomerization arylation hypervalent iodine catalyst.

Dehydrogenative cycloisomerization/arylation sequence of heteroatom nucleophile-tethered unactivated alkynes provides a facile and powerful approach to C-C bond formation between the generated heterocycles and unfunctionalized arenes. Here, authors describe a hypervalent iodine(III)-catalyzed synthesis of oxazoles concomitant with the introduction of aryl groups into side chain from N-propargyl carboxamides and arenes, representing first C(sp3)-C(sp2) bond formation by the catalytic dehydrogenative cycloisomerization/arylation reaction in exo-dig modes.

Advanced Synthesis & Catalysis published new progress about Amides Role: RCT (Reactant), RACT (Reactant or Reagent) (N-propargyl carboxamides). 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

Liu, Lin; Guo, Kai-Xin; Tian, Yu; Yang, Chang-Jiang; Gu, Qiang-Shuai; Li, Zhong-Liang; Ye, Liu; Liu, Xin-Yuan published the artcile< Copper-Catalyzed Intermolecular Enantioselective Radical Oxidative C(sp3)-H/C(sp)-H Cross-Coupling with Rationally Designed Oxazoline-Derived N,N,P(O)-Ligands>, Quality Control of 2725-82-8, the main research area is cycloalkene alkyne copper catalyst regioselective enantioselective oxidative cross coupling; cycloalkenyl alkyne preparation; alkyne aryl alkene copper catalyst enantioselective oxidative cross coupling; aryl alkyne preparation regioselective; alkynylation; anionic N,N,P(O)-ligands; copper catalysis; oxidative cross-coupling; radical asymmetric chemistry.

Here, a copper-catalyzed asym. C(sp3)-C(sp) cross-coupling of (hetero)benzylic and (cyclic)allylic C-H bonds with terminal alkynes that occurs with high to excellent enantioselectivity was reported. Critical to the success is the rational design of chiral oxazoline-derived N,N,P(O)-ligands that not only tolerate the strong oxidative conditions which were requisite for intermol. hydrogen atom abstraction (HAA) processes but also induce the challenging enantiocontrol. Direct access to a range of synthetically useful chiral benzylic alkynes and 1,4-enynes, high site-selectivity among similar C(sp3)-H bonds, and facile synthesis of enantioenriched medicinally relevant compounds make this approach very attractive.

Angewandte Chemie, International Edition published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 2725-82-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H9Br, Quality Control of 2725-82-8.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Adachi, Yohei; Arai, Fuka; Yamada, Kohei; Kurihara, Maho; Ohshita, Joji published the artcile< Optical Properties of Boron-Incorporated Analogues of Tetrathienoanthracene>, Related Products of 576-83-0, the main research area is borepin incorporated analog tetrathienoanthracene preparation emission fluorescence DFT; crystal structure borepin incorporated analog tetrathienoanthracene; mol structure borepin incorporated analog tetrathienoanthracene.

B-introduced aromatic systems have caught the interest of materials chemists because of their unique photophys. properties and tunable Lewis acidity. The authors prepared B-incorporated analogs of tetrathienoanthracene (TTA) containing aromatic borepin rings. Despite the low aromaticity of the borepin rings, the bis-borepins showed high chem. stability and no decomposition in air. The bis-borepins exhibited bluish fluorescence at room temperature and bright greenish phosphorescence at a low temperature The specific electronic structure of the B-incorporated analogs of TTA was revealed by comparing the photophys. properties of the bis-borepins with those of TTA and the parent mono-borepin. The electronic structure was further studied by DFT/TD-DFT calculations Titration experiments using cyanide as the anion revealed the high Lewis acidity and the turn-off fluorescence response of the bis-borepins to the addition of cyanide.

Organometallics published new progress about Anthracenes Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), SPN (Synthetic Preparation), PROC (Process), PREP (Preparation) (borepin-incorporated analogs of tetrathienoanthracene). 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

He, Zhi-Tao; Zhao, Yi-Shuang; Tian, Ping; Wang, Chuan-Chuan; Dong, Han-Qing; Lin, Guo-Qiang published the artcile< Copper-Catalyzed Asymmetric Hydroboration of α-Dehydroamino Acid Derivatives: Facile Synthesis of Chiral β-Hydroxy-α-amino Acids>, Category: bromides-buliding-blocks, the main research area is dehydroamino acid preparation asym hydroboration copper catalyst; hydroxy amino acid asym preparation.

The Cu-catalyzed asym. conjugate hydroboration reaction of β-substituted α-dehydroamino acid derivatives has been established, affording enantio-enriched syn- and anti-β-boronate-α-amino acid derivatives with excellent combined yields (83-99%, dr ≈ 1:1) and excellent enantioselectivities (92-98% ee). The hydroboration products were expediently converted into valuable β-hydroxy-α-amino acid derivatives, which were widely used in the preparation of chiral drugs and bioactive mols.

Organic Letters published new progress about Amino acids, hydroxy Role: SPN (Synthetic Preparation), PREP (Preparation). 188813-04-9 belongs to class bromides-buliding-blocks, and the molecular formula is C8H7BrO, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gong, Zehao; Wang, Yixin; Yan, Qiang published the artcile< Polymeric partners breathe together: using gas to direct polymer self-assembly via gas-bridging chemistry>, Name: 2,4,6-Trimethylbromobenzene, the main research area is self assembly gas bridging chem polymer breathe.

The quest for a general and facile way to regulate polymer self-assembled nanostructures with low- to high-order ergodicity is an eternal theme in soft nanoparticle fabrication. Here we present an unprecedented gas-bridging strategy that allows to use gas to direct polymer self-assembly in continuous and tunable manners. Such system comprises a partner of frustrated Lewis polymers with bulky Lewis acid and base groups. They can together ′breathe in′ external gases to form gas-bridged structures between the two complementary moieties, which drive their mutual complexation and assemble into polymer nanoparticles of diverse geometries and dimensionalities. This strategy is applicable to a broad family of gas substances including but not limited to carbon oxides, nitrogen oxides, sulfur oxides, and even olefins; moreover, tailoring gas types and levels can dictate distinct assembling evolutionary pathways and deformable behaviors among spherical, fibrous, polymersomal, tubesomal and cubosomal morphologies. We also discover that the gas-based bonding chem. is the mechanistic basis underlying the phase transitional control and phase window regulation. This will open a new direction of making bespoke polymer nanostructures with gas.

Science China: Chemistry published new progress about Alkenes Role: PEP (Physical, Engineering or Chemical Process), PROC (Process). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Name: 2,4,6-Trimethylbromobenzene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary