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Tayama, Eiji’s team published research in RSC Advances in 2021 | 3959-07-7

RSC Advances published new progress about Azetidines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (aryl). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Electric Literature of 3959-07-7.

Tayama, Eiji; Kawai, Kohei published the artcile< Synthesis of tertiary alkyl fluorides and chlorides by site-selective nucleophilic ring-opening reaction of α-aryl azetidinium salts>, Electric Literature of 3959-07-7, the main research area is chloride alkyl fluoride preparation regioselective; aryl azetidinium salt nucleophilic ring opening.

Site-selective nucleophilic ring-opening reactions of 2-arylazetidine-2-carboxylic acid ester-derived tetraalkyl ammonium salts with tetrabutylammonium halides (Bu4NX) to give tertiary alkyl halides I [R = 5-Me, 5-MeO, 3-Br, 4-Br, 5-Br, 4-CF3, 5-CF3; R1 = NEt2, F, Cl; R2 = NEt2, F, Cl] were successfully demonstrated. For example, a nucleophilic ring-opening reaction of 2-(o-tolyl) derivative with 1.2 equiv of tetrabutylammonium fluoride (Bu4NF) in THF at 60°C preferentially proceeded at a more substituted carbon atom (2-position) compared to a less-substituted carbon atom (4-position) and afforded tert-Bu 4-(dimethylamino)-2-fluoro-2-(o-tolyl)butanoate in 71% yield as the corresponding tertiary alkyl fluoride. This result was applied to synthesize optically active organofluorine compounds starting from com. available (R)-1-phenylethylamine.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Liu, Xin’s team published research in Tetrahedron Letters in 2022-01-05 | 2725-82-8

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

Liu, Xin; Geng, Haoxing; Zhu, Qing published the artcile< Visible light-mediated, high-efficiency oxidation of benzyl to acetophenone catalyzed by fluorescein>, Formula: C8H9Br, the main research area is ketone preparation green chem chemoselective; benzyl compound oxidation fluorescein catalyst.

An environmentally friendly aerobic oxidation of benzyl C(sp3)-H bonds to ketones, e.g., 1,2,3,4-tetrahydronaphthalen-1-one via selective oxidation catalysis was developed. Fluorescein is an efficient photocatalyst with excellent chem. selectivity. The reaction has a wide substrate scope, and a successful gram-scale experiment demonstrated its potential industrial utility.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Menzel, Karsten’s team published research in Synlett in 2006-08-01 | 603-78-1

Synlett published new progress about Aromatic carboxylic acids Role: SPN (Synthetic Preparation), PREP (Preparation) (bromo-). 603-78-1 belongs to class bromides-buliding-blocks, and the molecular formula is C7H4Br2O2, Recommanded Product: 2,3-Dibromobenzoic acid.

Menzel, Karsten; Dimichele, Lisa; Mills, Paul; Frantz, Doug E.; Nelson, Todd D.; Kress, Michael H. published the artcile< Regioselective halogen-metal exchange reaction of 3-substituted 1,2-dibromo arenes: the synthesis of 2-substituted 5-bromobenzoic acids>, Recommanded Product: 2,3-Dibromobenzoic acid, the main research area is substituted dibromoarene isopropylmagnesium chloride regioselective halogen metal exchange; bromoarene substituted preparation; bromobenzoic acid substituted preparation; regioselective halogen metal exchange reagent isopropylmagnesium chloride.

Regioselective halogen-metal exchange reactions using isopropylmagnesium chloride were carried out on 3-substituted 1,2-dibromo arenes, e.g., I. When the 3-substituent was either electron-withdrawing and/or possessed lone pair electrons that enabled chelation of isopropylmagnesium chloride, a high regioselectivity for the halogen-metal exchange adjacent to the 3-substituents resulted.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wu, Xiaoyu’s team published research in European Journal of Organic Chemistry in 2011 | 3893-18-3

European Journal of Organic Chemistry published new progress about Cyclization (cyclic β-enamino esters). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Safety of 3-(4-Bromophenyl)acrylaldehyde.

Wu, Xiaoyu; Nie, Linlin; Fang, Huihui; Chen, Jie; Cao, Weiguo; Zhao, Gang published the artcile< Organocatalyzed Cascade Reactions of Cyclic β-Enamino Esters and α,β-Unsaturated Aldehydes Leading to Indoloquinolizidines and Benzoquinolizidines>, Safety of 3-(4-Bromophenyl)acrylaldehyde, the main research area is quinolizidine fused preparation; indoloquinolizidine preparation; benzoquinolizidine preparation; organocatalyst cascade reaction cyclic enamino ester unsaturated aldehyde.

Organocatalyzed cascade reactions between cyclic β-enamino esters and α,β-unsaturated aldehydes have been developed. They provide highly substituted indolo[2,3-a]quinolizidines and benzo[a]quinolizidines in moderate to good yields and with good to excellent enantioselectivities. Both aromatic and aliphatic α,β-unsaturated aldehydes react readily with enamino esters to furnish the desired products. E.g., organocatalyzed reaction of enamino ester (I) with 4-BrC6H4CH:CHCHO gave 77% indolo[2,3-a]quinolizidine (II).

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kuratsu, Masato’s team published research in Angewandte Chemie, International Edition in 2005-06-27 | 135999-16-5

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

Kuratsu, Masato; Kozaki, Masatoshi; Okada, Keiji published the artcile< 2,2':6',2'':6'',6-trioxytriphenylamine: Synthesis and properties of the radical cation and neutral species>, Reference of 135999-16-5, the main research area is trioxytriphenylamine synthesis property radical cation mol structure.

A flat radical: Oxygen-bridged triphenylamine 1 and its radical cation 2 were prepared The neutral compound has a shallow bowl structure, whereas the radical cation is planar. The properties of the highly stable radical cation were clarified; such compounds have potential applicability in electronic and magnetic materials.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Lei’s team published research in Chemistry – A European Journal in 2016 | 3893-18-3

Chemistry – A European Journal published new progress about Aldol condensation. 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Computed Properties of 3893-18-3.

Wang, Lei; Li, Sun; Chauhan, Pankaj; Hack, Daniel; Philipps, Arne R.; Puttreddy, Rakesh; Rissanen, Kari; Raabe, Gerhard; Enders, Dieter published the artcile< Asymmetric, Three-Component, One-Pot Synthesis of Spiropyrazolones and 2,5-Chromenediones from Aldol Condensation/NHC-Catalyzed Annulation Reactions>, Computed Properties of 3893-18-3, the main research area is pyrazolone enal NHC chiral aldol condensation annulation catalyst; spiropyrazolone stereoselective preparation; diketone cyclic enal NHC chiral aldol condensation annulation catalyst; chromenedione stereoselective preparation; N-heterocyclic carbene; asymmetric synthesis; chromenedione; multicomponent reaction; spiropyrazolone.

A novel one-pot, three-component diastereo- and enantioselective synthesis of spiropyrazolones has been developed involving the aldol condensation of an enal to generate α,β-unsaturated pyrazolones, which react with a second equivalent of enal through an N-heterocyclic carbene (NHC)-catalyzed [3+2] annulation. The desired spirocyclopentane pyrazolones I (R = Ph, 4-MeOC6H4, 2-MeOC6H4, 4-ClC6H4, 4-BrC6H4, 2-furanyl, 3-thienyl, etc.; R1 = t-Bu, Et, 4-MeOC6H4, 2-naphthyl; R2 = Ph, 4-MeOC6H4, 4-BrC6H4, Bn, t-Bu, etc.) are obtained in moderate to good yields and good to excellent stereoselectivities. Alternatively, starting from cyclic 1,3-diketones, 2,5-chromenediones II (R = Ph, 4-MeOC6H4, 4-MeC6H4, 4-ClC6H4, 2-MeOC6H4, etc.; R1= R2= Me, H; R1= H, R2= Ph) are available through [2+4] annulation.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Song-Lin’s team published research in Organic & Biomolecular Chemistry in 2016 | 6942-39-8

Organic & Biomolecular Chemistry published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 6942-39-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H6BrFO2, Safety of Methyl 2-bromo-5-fluorobenzoate.

Zhang, Song-Lin; Yu, Ze-Long published the artcile< Divergent synthesis of indoles, oxindoles, isocoumarins and isoquinolinones by general Pd-catalyzed retro-aldol/α-arylation>, Safety of Methyl 2-bromo-5-fluorobenzoate, the main research area is indole oxindole isocoumarin isoquinolinone preparation; aryl halide hydroxy carbonyl retro aldol arylation palladium catalyst.

Divergent synthesis of indoles I (R = H, 6-CH3, 5-F, etc.; R1 = CH3, C6H5), oxindoles II, isocoumarins e.g., III and isoquinolinones IV (R2 = CH3, C6H5) is described in this report by using a general Pd-catalyzed tandem reaction of β-hydroxy carbonyl compounds R3C(O)CH2C(R4)(OH)CH3 (R3 = CH3, C6H5, OCH3CH2; R4 = CH3, C6H5) with aryl halides bearing an ortho-nitro, -ester or -cyano substituent e.g., Me 2-chloropyridine-3-carboxylate. A key retro-aldol/α-arylation reaction is involved that merges classic Pd cross-coupling chem. with novel Pd-promoted retro-aldol C-C activation to produce α-arylated ketones or esters. Subsequent intramol. condensation of the carbonyl with the ortho-synthon gives target heterocycles I, II, e.g., III and IV. The use of common, com. available and cheap substrates and catalyst system adds addnl. synthetic advantages to the conceptual significance.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Xiao, Yuting’s team published research in Journal of the American Chemical Society in 2019-02-13 | 3959-07-7

Journal of the American Chemical Society 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, Name: 4-Bromobenzylamine.

Xiao, Yuting; Tian, Guohui; Li, Wei; Xie, Ying; Jiang, Baojiang; Tian, Chungui; Zhao, Dongyuan; Fu, Honggang published the artcile< Molecule Self-Assembly Synthesis of Porous Few-Layer Carbon Nitride for Highly Efficient Photoredox Catalysis>, Name: 4-Bromobenzylamine, the main research area is self assembly porous carbon nitride efficient photoredox catalysis.

Polymeric C nitride (C3N4) has emerged as the most promising candidate for metal-free photocatalysts but is plagued by low activity due to the poor quantum efficiency and low sp. surface area. Exfoliation of bulk crystals into ultrathin nanosheets proved to be an effective and widely used strategy for enabling high photocatalytic performances; however, this process is complicated, time-consuming, and costly. Here, the authors report a simple bottom-up method to synthesize porous few-layer C3N4, which involves mol. self-assembly into layered precursors, alc. mols. intercalation, and subsequent thermal-induced exfoliation and polycondensation. The as-prepared few-layer C3N4 expose more active sites and greatly enhance the separation of charge carriers, thus exhibiting a 26-fold higher hydrogen evolution activity than bulk counterpart. Also, both the high activity and selectivity for the oxidative coupling of amines to imines can be obtained under visible light that surpass those of other metal-free photocatalysts so far.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gopalaiah, Kovuru’s team published research in Tetrahedron in 2021-10-08 | 3959-07-7

Tetrahedron published new progress about Alkynes, aryl Role: RCT (Reactant), RACT (Reactant or Reagent). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Category: bromides-buliding-blocks.

Gopalaiah, Kovuru; Choudhary, Renu published the artcile< Synthesis of Krohnke pyridines through iron-catalyzed oxidative condensation/double alkynylation/amination cascade strategy>, Category: bromides-buliding-blocks, the main research area is arylacetylene arylmethylamine iron regioselective tandem oxidative condensation alkynylation amination; triarylpyridine preparation.

An efficient protocol for the synthesis of sym. and unsym. 2,4,6-trisubstituted pyridines via oxidative cascade annulation of arylacetylenes with benzylamines was developed. The reaction proceeded smoothly by utilizing iron(II) triflate as a catalyst and mol. oxygen as an oxidant with broad substrate scope. Mechanistic studies revealed that the reaction may experience an oxidative condensation followed by double alkynylation and amination process.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Xu, Peng’s team published research in Angewandte Chemie, International Edition in 2020 | 2725-82-8

Angewandte Chemie, International Edition published new progress about Arenesulfonium compounds Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 2725-82-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H9Br, Synthetic Route of 2725-82-8.

Xu, Peng; Zhao, Da; Berger, Florian; Hamad, Aboubakr; Rickmeier, Jens; Petzold, Roland; Kondratiuk, Mykhailo; Bohdan, Kostiantyn; Ritter, Tobias published the artcile< Site-Selective Late-Stage Aromatic [18F]Fluorination via Aryl Sulfonium Salts>, Synthetic Route of 2725-82-8, the main research area is aromatic fluorination aryl sulfonium salt; 18F labeling; C−H functionalization; fluorination; late-stage functionalization; radiochemistry.

Site-selective functionalization of C-H bonds in small complex mols. is a long-standing challenge in organic chem. Herein, the authors report a broadly applicable and site-selective aromatic C-H dibenzothiophenylation reaction. The conceptual advantage of this transformation is further demonstrated through the two-step C-H [18F]fluorination of a series of marketed small-mol. drugs.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary