Category: bromides-buliding-blocks

Barber, E. Ryan; Hynds, Hannah M.; Stephens, Claudia P.; Lemons, Holli E.; Fredrickson, Emily T.; Wilger, Dale J. published the artcile< Nickel-Catalyzed Hydroarylation of Alkynes under Reductive Conditions with Aryl Bromides and Water>, SDS of cas: 2725-82-8, the main research area is nickel catalyzed hydroarylation alkyne aryl bromide; reductive cross coupling alkyne arylbromide water anti selectivity.

An operationally simple nickel-catalyzed hydroarylation reaction for alkynes is described. This three-component coupling reaction utilizes com. available alkynes and aryl bromides, along with water and Zn. An air-stable and easily synthesized Ni(II) precatalyst is the only entity used in the reaction that is not com. available. This reductive cross-coupling reaction displays a fairly unusual anti selectivity when aryl bromides with ortho substituents are used. In addition to optimization data and a preliminary substrate scope, complementary experiments including deuterium labeling studies are used to provide a tentative catalytic mechanism. We believe this report should inspire and inform other Ni-catalyzed carbofunctionalization reactions.

Journal of Organic Chemistry published new progress about Alkynes 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

Zhang, Yajun; Jiang, Dandan; Fang, Zheng; Zhu, Ning; Sun, Naixian; He, Wei; Liu, Chengkou; Zhao, Lili; Guo, Kai published the artcile< Photomediated core modification of organic photoredox catalysts in radical addition: mechanism and applications>, Application of C8H8BrF, the main research area is bismethoxyphenyl dihydrophenazine bromoalkane photochem cross coupling; alkyl bisphenyl dihydrophenazine preparation.

Here, a new kind of core modification for dihydrophenazines, phenoxazines and phenothiazines was developed through this cross-coupling process. Mechanistic studies suggested that the radical species would be more likely to couple with OPC’ radical cations rather than the ground-state OPC. Core modification of OPCs could stabilize the radical ions in an oxidative quenching catalytic cycle. Significantly, core modifications of OPCs could lower the energy of light required for photoexcitation. Compared with their noncore-modified counterparts, all the core-modified dihydrophenazines and phenoxazines exhibited efficient performance in controlling O-ATRP for the synthesis of poly(Me methacrylate) with higher initiator efficiencies under the irradiation of simulated sunlight.

Chemical Science published new progress about Atom transfer radical polymerization. 405931-46-6 belongs to class bromides-buliding-blocks, and the molecular formula is C8H8BrF, Application of C8H8BrF.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Berger, Martin; Carboni, Davide; Melchiorre, Paolo published the artcile< Photochemical Organocatalytic Regio- and Enantioselective Conjugate Addition of Allyl Groups to Enals>, Quality Control of 3893-18-3, the main research area is prenyl enal preparation regioselective chemoselective enantioselective photochem; unsaturated aldehyde allyl silane allylation organocatalyst; allylation; enantioselectivity; organocatalysis; photochemistry; regioselectivity.

Synthesis of first catalytic enantioselective conjugate addition of allyl groups R1R2C=CH-CH2Si(CH3)3 [R1 = i-Pr, Me, cyclohexyl; R2 = i-Pr, cyclohexyl, n-hexyl, Ph; R1R2 = -(CH2)5-, -(CH2)2O(CH2)2-] (I) to α,β-unsaturated aldehydes ArCH=CHCHO (II) (Ar = Ph, 4-chlorophenyl, 3-methylphenyl, etc.) was reported. The chem. exploits the visible-light-excitation of chiral iminium ions to activate allyl silanes I towards the formation of allylic radicals, which are then intercepted stereoselectively. The underlying radical mechanism of this process overcomes the poor regio- and chemoselectivity that traditionally affects the conjugate allylation of enals II proceeding via polar pathways. Synthesis demonstrates that this organocatalytic strategy could selectively install a valuable prenyl fragment at the β-carbon of enals R1R2C=CHCH2CH(Ar)CH2CHO.

Angewandte Chemie, International Edition published new progress about Aldehydes Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Quality Control of 3893-18-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Meng; Chen, Jun; Chen, Zongjia; Zhong, Changxu; Lu, Ping published the artcile< Enantioselective Desymmetrization of Cyclobutanones Enabled by Synergistic Palladium/Enamine Catalysis>, Computed Properties of 135999-16-5, the main research area is cyclobutanone enantioselective desymmetrization palladium enamine catalyst; arylation; cyclobutanones; desymmetrization; palladium; synergistic catalysis.

The enantioselective intramol. α-arylation of cyclobutanones was established by combining palladium and enamine catalyst systems. Two different enantioselective control strategies were developed for cyclobutanone substrates bearing O- or N-tethered aryl bromides. Further synthetic applications are also reported.

Angewandte Chemie, International Edition published new progress about Arylation. 135999-16-5 belongs to class bromides-buliding-blocks, and the molecular formula is C7H7BrO2, Computed Properties of 135999-16-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Choudhuri, Khokan; Maiti, Saikat; Mal, Prasenjit published the artcile< Iodine(III) Enabled Dehydrogenative Aryl C-S Coupling by in situ Generated Sulfenium Ion>, Related Products of 576-83-0, the main research area is diaryl sulfide preparation; thiol arene phenyliodo diacetate dehydrogenative coupling reaction; aryl sulfinyl arene preparation; arene thiol phenyliodo diacetate sulfoxidation.

An umpolung based one pot and direct C-S coupling approach under metal free and mild condition were described. Electrophile sulfenium ions were generated in situ from thiols RSH (R = Ph, Et, 4-nitrophenyl, 3-chlorophenyl, etc.) using iodine(III) reagent PhI(OAc)2 (PIDA) and subsequently used for aromatic electrophilic substitution (EArS) to synthesize diaryl sulfides R1SR (R1 = 2,4,6-trimethylphenyl, 4-methoxyphenyl, 2,4-dimethylphenyl, etc.). Also by using of appropriate amount of PIDA, cascaded synthesis of C-S and S=O bonds led to aryl sulfinyl arenes R1S(O)R in one pot. Covalent self-sorting or competitive experiments further confirmed the involvement of sulfenium ion in the EArS.

Advanced Synthesis & Catalysis published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Hassaballah, Aya I.; Ramadan, Sayed K.; Rizk, Sameh A.; El-Helw, Eman A. E.; Abdelwahab, Salwa S. published the artcile< Ultrasonic Promoted Regioselective Reactions of the Novel Spiro 3,1-Benzoxazon-Isobenzofuranone Dye Toward Some Organic Base Reagents>, Synthetic Route of 82-73-5, the main research area is spiro benzoxazinone isobenzofuranone nucleophile electrophile multicomponent reaction regioselective ultrasonic; antitumor antibacterial antifungal activity human green chem.

4′-Bromo-3′H-spiro[benzo[d][1,3]-oxazine-2,1′-isobenzofuran]-3′,4(1H)-dione dye is prepared via condensation of 2-aminobenzoic acid with 4-bromoisobenzofuran-1,3-dione under Ultrasonic, solvent-free and basic reaction conditions. The spiro product exhibited both electrophilic and nucleophilic centers. A series of nitrogen nucleophiles such as hydrazine, glycine, 2-aminopyridine, pyridin-2-ylmethanamine, 4-methoxyaniline, 4-aminoacetophenone, morpholine, piperidine or 1-ethylpiperazine and carbon electrophiles such as (chloromethyl)oxirane, Et chloroacetate, chloroacetyl chloride can be treated with 2-benzoxazine-2-yl benzoic acid (BBA) via multicomponent reaction. The fluorescence of the spiro product dyes decreases proportionally to the initial chloride concentration in the solution The chem. structures of the synthesized compounds can be confirmed by microanal., spectral data and optimized by quantum chem. parameters. Biol. evaluation showed that these synthesized spiro compounds exhibited moderate to good cytotoxic activity. Among them, compounds and displayed the best cytotoxic activity against MCF7 and Wl-38 cell lines.

Polycyclic Aromatic Compounds published new progress about Antibacterial agents. 82-73-5 belongs to class bromides-buliding-blocks, and the molecular formula is C8H3BrO3, Synthetic Route of 82-73-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hanafi, Maha; Chen, Xinde; Neamati, Nouri published the artcile< Discovery of a Napabucasin PROTAC as an Effective Degrader of the E3 Ligase ZFP91>, Recommanded Product: 4-Bromoisobenzofuran-1,3-dione, the main research area is tumorigenesis oncogenic pathways PROTACs STAT3 E3 ligase cytotoxicity degrader.

Napabucasin, undergoing multiple clin. trials, was reported to inhibit the signal transducer and transcription factor 3 (STAT3). To better elucidate its mechanism of action, we designed a napabucasin-based proteolysis targeting chimera (PROTAC), XD2-149(I) that resulted in inhibition of STAT3 signaling in pancreatic cancer cell lines without inducing proteasome-dependent degradation of STAT3. Proteomics anal. of XD2-149 revealed the downregulation of the E3 ubiquitin-protein ligase ZFP91. XD2-149 degrades ZFP91 with DC50 values in the nanomolar range. The cytotoxicity of XD2-149 was significantly, but not fully, reduced with ZFP91 knockdown providing evidence for its multi-targeted mechanism of action. The NQO1 inhibitor, dicoumarol, rescued the cytotoxicity of XD2-149 but not ZFP91 degradation, suggesting that the NQO1-induced cell death is independent of ZFP91. ZFP91 plays a role in tumorigenesis and is involved in multiple oncogenic pathways including NF-κB and HIF-1α.

Journal of Medicinal Chemistry published new progress about Antitumor agents. 82-73-5 belongs to class bromides-buliding-blocks, and the molecular formula is C8H3BrO3, Recommanded Product: 4-Bromoisobenzofuran-1,3-dione.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Da, Ya-jing; Yuan, Wei-dong; Xin, Ting; Nie, Yong-yan; Ye, Ying; Yan, Yi-Jia; Liang, Li-sha; Chen, Zhi-long published the artcile< Synthesis and biological evaluation of new fluorine substituted derivatives as angiotensin II receptor antagonists with anti-hypertension and anti-tumor effects>, Category: bromides-buliding-blocks, the main research area is fluorine compound preparation angiotensin II receptor antagonist SAR; antihypertensive antitumor losartan fluorinated derivative preparation SAR.

The synthesis and pharmaceutical activity of new potent non-tetrazole angiotensin II (Ang II) receptor antagonists were described. These compounds were fluorine substituted derivatives of Losartan, Valsartan and Irbesartan with carboxylic acid group as replacements to the known potent tetrazole moiety at the 2′-biphenyl position. Their activities were evaluated by Ang II receptor binding assay as well as by in vivo assay. All of the synthesized compounds showed nanomolar affinity for the AT1 receptor subtype. The vivo biol. evaluation showed that compounds 1a, 2 and 4 (I) produced a dose-dependent antihypertensive effect both in spontaneously hypertensive rats (SHR) and renal hypertensive rats (RHR). Compound 4 especially showed an efficient and long-lasting effect in reducing blood pressure which can last more than 24 h at dose of 10 mg/kg in SHR, which was much better than control Losartan and Valsartan. Compound 4 can also inhibit the prostate cancer in vitro and in vivo. So compound 4 was selected for in-depth investigation as potent, novel and long-lasting non-tetrazole anti-hypertension and anti-tumor drug candidate.

Bioorganic & Medicinal Chemistry published new progress about Angiotensin II receptor antagonists. 6942-39-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H6BrFO2, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Cody, John; Fahrni, Christoph J. published the artcile< Fluorescence sensing based on cation-induced conformational switching: copper-selective modulation of the photoinduced intramolecular charge transfer of a donor-acceptor biphenyl fluorophore>, Recommanded Product: 4-Bromo-3-formylbenzonitrile, the main research area is fluorescence sensing cation induced conformational switching copper selective modulation; photoinduced intramol charge transfer donor acceptor biphenyl fluorophore.

The fluorescence emission energy of donor-acceptor substituted biphenyls is highly sensitive towards conformational changes of the interannular twist angle. By integrating 4-dimethylamino-4′-cyano-biphenyl into the ligand backbone of a thioether-rich metal receptor we designed a fluorescence sensor that exhibits high selectivity towards copper. Upon metal binding the ligand undergoes a significant conformational change, which induces a strong hypsochromic shift of the photoinduced charge-transfer emission. Steady-state absorption and fluorescence spectroscopy revealed a high affinity towards Cu(I) with a well-defined 1:1 metal-ligand complex stoichiometry. The nature of the conformational changes upon Cu(I) coordination were analyzed in detail by 1H NMR and 2D NOESY experiments The spectroscopic data provide a coherent picture, which is consistent with a Boltzmann ground-state distribution of several rotamers that are locked into a more flattened geometry upon coordination of Cu(I).

Tetrahedron published new progress about Fluorescence spectroscopy. 89003-95-2 belongs to class bromides-buliding-blocks, and the molecular formula is C8H4BrNO, Recommanded Product: 4-Bromo-3-formylbenzonitrile.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Yaxuan; Fu, Yajie; Ren, Chaojie; Tang, Dong; Wu, Ping; Meng, Xu; Chen, Baohua published the artcile< Copper-catalyzed oxidative coupling reaction of α,β-unsaturated aldehydes with amidines: synthesis of 1,2,4-trisubstituted-1H-imidazole-5-carbaldehydes>, Category: bromides-buliding-blocks, the main research area is aldehyde amidine oxidative coupling reaction; imidazole carbaldehyde preparation.

Practical and highly functional group-compatible synthesis of 1,2,4-trisubstituted-1H-imidazole-5-carbaldehydes were developed via copper-catalyzed oxidative coupling of amidines and α,β-unsaturated aldehydes, which features aldehyde preservation, cheap catalysts, as well as high atom economy and mild conditions.

Organic Chemistry Frontiers published new progress about Amidines Role: RCT (Reactant), RACT (Reactant or Reagent). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary