Category: bromides-buliding-blocks

Wu, Guojiao; Deng, Yifan; Wu, Chaoqiang; Zhang, Yan; Wang, Jianbo published the artcile< Synthesis of α-Aryl Esters and Nitriles: Deaminative Coupling of α-Amino-Esters and α-Aminoacetonitriles with Arylboronic Acids>, Safety of Ethyl 2-(3-bromophenyl)acetate, the main research area is nitrile benzeneacetonitrile preparation; benzeneacetic areneacetic acid ester preparation; arenes; boron; diazo compounds; nitriles; synthetic methods.

Transition-metal-free synthesis of α-aryl esters and nitriles using arylboronic acids with α-amino esters and α-(amino)acetonitrile derivatives, resp., as starting materials has been developed. The reaction represents a rare case of converting C(sp3)-N bonds (carbon-nitrogen bonds) into C(sp3)-C(sp2) bonds (carbon-carbon bonds). The reaction conditions are mild, demonstrate good functional-group tolerance, and can be scaled up. The synthesis of the target compounds was achieved using glycine ester hydrochloride, leucine ester hydrochloride, aspartate ester hydrochloride, alanine ester hydrochloride as starting materials in a reaction with (aryl)boronic acids. The title compounds thus formed included benzeneacetic acid esters, 1-naphthaleneacetic acid ester, benzenepropanoic acid esters, α-phenyl-1H-indole-3-propanoic acid ester, benzenebutanoic acid ester and similar substances. A reaction of (aryl)boronic acids with α-(amino)acetonitrile gave α-(alkyl)benzeneacetonitrile derivatives Nitriles included α-(hexyl)benzeneacetonitrile, α-phenyl-3-thiophenepropanenitrile and similar compounds

Angewandte Chemie, International Edition published new progress about Amino acid esters Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Alam, Ryan M.; Keating, John J. published the artcile< An Expedient Approach to Pyrazolo[3,4-b]pyridine-3-carboxamides via Palladium-Catalyzed Aminocarbonylation>, Recommanded Product: 4-Bromobenzylamine, the main research area is iodo fluorobenzyl pyrazolopyridine formic acid amine palladium catalyst aminocarbonylation; fluorobenzyl pyrazolopyridine carboxamide preparation.

A series of novel 1,3-disubstituted pyrazolo[3,4- b]pyridine-3-carboxamide derivatives was prepared by introducing the 3-carboxamide moiety using palladium-catalyzed aminocarbonylation methodol. and employing CO gas generated ex-situ using a two-chamber reactor (COware ). The functional group tolerance of this optimized aminocarbonylation protocol was highlighted through the synthesis of a range of diversely substituted C-3 carboxamide pyrazolo[3,4- b]pyridines in excellent yields of up to 99%.

Synthesis published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Recommanded Product: 4-Bromobenzylamine.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Mel’nikov, N. N.; Turetskaya, R. Kh.; Baskakov, Yu. A.; Boyarkin, A. N.; Kuznetsova, M. S. published the artcile< The structure and the physiological activity of substituted phenylacetic and naphthylacetic acids>, Product Details of C9H9BrO2, the main research area is .

Introduction of halogen into the ring of PhCH2CO2H increases the physiol. activity, which is greatest with Cl; Br is less active; iodine in the p-position does not increase activity. Most active are the 2-halo, least active the 4-halo derivatives, while the 3-halo derivatives are intermediate. This is the reverse order of activity in comparison with phenoxyacetic acids. Introduction of a 2nd halogen does not change the physiol. activity, while a 3rd halogen can either reduce or increase activity. A Me group in the p-position reduces the activity, and 3 Me groups reduce it very much. A smaller decrease in activity is caused by a p-MeO group. Halogenation of m-MeC6H4OCH2CO2H causes increased activity, the greatest activity resulting from 4-substitution, and lesser activity from 2-halogenation. With 2,4-D as the standard which gave 100% increase of wheat coleoptile growth at 1 mg./l. concentration, and heteroauxin as the standard which gave 100% increase of kidneybean root growth, the following physiol. results were obtained in plant tests; (in above order, with 1, 10, and 100 mg./l. concentrations tested for the wheat growth, and 10, 50 and 100 mg./l. concentrations for the kidney bean growth). Substituted phenylacetic acids (substituents given): H, m. 76°, -2%, +45%, -, -, +4%, 0%; ο-Cl, m. 95°, +70%, +84%, – +5%, +150%, -; m-Cl, m. 74°, +9%, +61%, -, -, +62%, +260%; p-Cl, m. 106°, +13%, +71%, -, -, +55%, +91%; ο-Br, m. 104°, +7%, +71%, -, -, +33%, +104%; p-Br, m. 114°, +2%, +80%, -, -, 0%, +8%; p-I, m. 135°, -4%, -6%, -, -, 0%, +21%; 2,4-di-Cl, m. 131°, +10%, +80%, -, -, +58%, +162%; 2,5-di-Cl, m. 105°, +13%, +80%, -, -, +30%, +120%; 2,3,4-tri-Cl, m. 136°, +40%, +71%, -, -, +150%, -60%; 2,4,5-tri-Cl analog, m. 126°, 0%, +56%, -, -, +98%, +100%; p-MeO, m. 83°, -, +20%, +20%, -, 0%, 0%; p-Me, m. 92°, -, +5%, +6%, -, 0%, 0%; 4,3-ClMe, m. 83°, +22%, +73%, -, -, +7%, +69%; 4,3-BrMe, m. 81°, +20%, +71%, -, -, 14%, +90%; 6,3-ClMe, m. 86°, -2%, +40%, -, -, 0%, -25%; 6,3-BrMe, m. 82°, -8%, +59%, -, -, +66%, +66%;, 2,4-ClMe, m. 106°, +13%, +44%, -, -, +12%, +33%; 3,4-Me(MeO), m. 127°, -, +1%, +34%, -, 0%, 0%; 2,4,5-Tri-Me, m. 117°, -, +3%, -6%, -, -21%, -25%; 2,4-Me(MeO), m. 107°, -, -12%, +25%, -, 0%, 0%. In substituted naphthylalkylcarboxylic acids it was shown that removal of CO2H from the ring by more than 1 C atom reduces the physiol. activity and the compounds with an acid group at the 1-position on C10H8 skeleton are the only active ones; substances with 2-substitution are inactive. Substitution of alkyl groups or MeO groups into the C10H8 ring leads to sharp decline in activity. The following results were obtained in biol. tests (same standards as above): Substituted 1-naphthaleneacetic acids (substituents given): H, m. 131°, +77%, + 169%, -, -, +92%, -; 4-MeO, m. 144°, +2%, -12%, -, +10%, +27%, +9%; 4-Me, m. 148°, +1%, +1%, +4%, +36%, +24%, -10%; 4-Et, m. 129°, +9%, -, -, +9%, +6%, +27%; 4-Pr, m. 119°, -5%, -7%, -, +24%, +50%, +32%; 4-Bu, m. 110°, -, -14%, -, +21%, +20%, +33%. 1-C10H7COCH2CH2CO2H, m. 132°, +9%, +60%, -, -, -, -; 1-C10H7(CH2)3CO2H, m. 1602, +9%, +46%, -, -, -, -; 2-C10H7COCH2CH2CO2H, m. 174°, -25%, -9%, -, -, -, -, 2-C10H7(CH2)3CO2H, m. 109°, -3%, -5%, -, -, -, -. Most of the above acids were prepared by the Willgerodt reaction others through the nitriles from the corresponding benzyl halides.

Doklady Akademii Nauk SSSR published new progress about Halogens. 215949-57-8 belongs to class bromides-buliding-blocks, and the molecular formula is C9H9BrO2, Product Details of C9H9BrO2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Mhadhbi, Oumaima; Liu, Linhao; Benzai, Amal; Mellah, Besma; Besbes, Neji; Ollivier, Jerome; Cordier, Marie; Doucet, Henri published the artcile< Palladium-catalyzed direct C5-arylation or C4,C5-diarylation of 2-alkylisothiazol-3-ones>, Reference of 401-78-5, the main research area is aryl alkylisothiazolone preparation regioselective; alkylisothiazolone aryl bromide paladium catalyst arylation.

The regioselectivity of the Pd-catalyzed direct arylation of unsubstituted 2-alkylisothiazol-3(2H)-ones was investigated. Conditions for the regioselective palladium-catalyzed direct C5-arylation of 2-alkylisothiazol-3-ones using aryl bromides as the coupling partners are reported. This procedure tolerates a wide variety of substituents such as nitro, nitrile, ester, chloro, fluoro, trifluoromethyl, trifluoromethoxy, difluoromethoxy at para-, meta- and also ortho-positions on the aryl bromide. Both methyl- and octyl-substituents at 2-position of alkylisothiazol-3-ones are tolerated. Moreover, at a more elevated temperature in the presence of a larger excess of the aryl bromide, the access to the C4,C5-diarylated alkylisothiazol-3-ones is also possible, revealing that the C4-position of isothiazol-3(2H)-ones is reactive for direct arylation when the C5-position is blocked. Therefore, this method provides a one pot access to a wide variety of isothiazolinone derivatives allowing to modify easily their biol. properties.

Tetrahedron 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, Reference of 401-78-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Mo, Di-Wei; Dong, Shuai; Sun, Haiyan; Chen, Jia-Sheng; Pang, Jian-Xin; Xi, Bao-Min; Chen, Wen-Hua published the artcile< Synthesis and potent inhibitory activities of carboxybenzyl-substituted 8-(3-(R)-aminopiperidin-1-yl)-7-(2-chloro/cyanobenzyl)-3-methyl-3,7-dihydro-purine-2,6-diones as dipeptidyl peptidase IV (DPP-IV) inhibitors>, Quality Control of 85070-57-1, the main research area is dihydropurinedione derivative preparation dipeptidyl peptidase IV inhibitory activity; 3-Methyl-3,7-dihydro-purine-2,6-dione; Diabetes; Dipeptidyl peptidase IV inhibitor; Inhibitory activity; Synthesis.

Fourteen 3-methyl-3,7-dihydro-purine-2,6-dione derivatives bearing carboxybenzyl and 2-chloro/cyanobenzyl groups at the N-1 and N-7 positions, resp., were synthesized as dipeptidyl peptidase IV (DPP-IV) inhibitors. These compounds were characterized on the basis of NMR (1H and 13C) and ESI MS data. In vitro bioassay indicates that most of these compounds showed moderate to good inhibitory activities against DPP-IV. Among them, compound I (IC50 = 36 nM) exhibited comparable activity with a pos. control, Sitagliptin (IC50 = 16 nM). In addition, the structure-activity relationship of these compounds is also briefly discussed.

Bioorganic & Medicinal Chemistry Letters published new progress about Antidiabetic agents. 85070-57-1 belongs to class bromides-buliding-blocks, and the molecular formula is C9H8BrFO2, Quality Control of 85070-57-1.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Klett, Johannes; Wozniak, Lukasz; Cramer, Nicolai published the artcile< 1,3,2-Diazaphospholene-Catalyzed Reductive Cyclizations of Organohalides>, Recommanded Product: 2-Bromo-4-(trifluoromethyl)phenol, the main research area is dihydrobenzofurane pyrrolidine preparation photochem; aryl alkyl halide reductive cyclization diazaphospholene hydride catalyst; Cyclizations; Diazaphospholenes; Homogeneous Catalysis; Photocatalysis; Radical Reactions.

1,3,2-Diazaphospholene hydrides (DAP-Hs) are highly nucleophilic organic hydrides serving as main-group catalysts for a range of attractive transformations. DAP hydrides can act as stoichiometric hydrogen atom transfer agents in radical reactions. Herein, authors report a DAP-catalyzed reductive radical cyclization of a broad range of aryl and alkyl halides under mild conditions. The pivotal DAP catalyst turnover was achieved by a DBU-assisted σ-bond metathesis between the formed DAP halide and HBpin, which rapidly regenerates DAP-H. The transformation is significantly accelerated by irradiation with visible light. Mechanistic investigations indicate that visible light irradiation leads to the formation of DAP dimers, which are in equilibrium with DAP radicals and accelerate the cyclization. The direct use of (DAP)2 enabled a catalytic protocol in the absence of light.

Angewandte Chemie, International Edition published new progress about Anilines Role: RCT (Reactant), RACT (Reactant or Reagent). 81107-97-3 belongs to class bromides-buliding-blocks, and the molecular formula is C7H4BrF3O, Recommanded Product: 2-Bromo-4-(trifluoromethyl)phenol.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Huang, Bin; Cheng, Yujun; Lei, Hui; Hu, Lin; Li, Zaifang; Huang, Xuexiang; Chen, Lie; Chen, Yiwang published the artcile< A novel AIE molecule as a hole transport layer enables efficient and stable perovskite solar cells>, SDS of cas: 184239-35-8, the main research area is perovskite solar cell hole transport layer aggregation induced emission.

A low-cost and efficient hole transport layer (HTL) material (TPE-CZ) with the aggregation-induced emission (AIE) effect has been synthesized. Due to the AIE effect, perovskite solar cells with TPE-CZ as the HTL deliver a higher power conversion efficiency (PCE) of 18% with better stability than those with the reference HTL (Spiro-OMeTAD).

Chemical Communications (Cambridge, United Kingdom) published new progress about Aggregation-induced emission. 184239-35-8 belongs to class bromides-buliding-blocks, and the molecular formula is C26H18Br2, SDS of cas: 184239-35-8.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Rueping, Magnus; Sugiono, Erli; Merino, Estibaliz published the artcile< Asymmetric iminium ion catalysis: an efficient enantioselective synthesis of pyranonaphthoquinones and β-lapachones>, Safety of 3-(4-Bromophenyl)acrylaldehyde, the main research area is asym synthesis pyranonaphthoquinone addition cyclization aliphatic aromatic aldehyde hydroxynaphthoquinone; lapachone derivative asym synthesis pyranonaphthoquinone.

An addition-cyclization reaction cascade triggered by an organocatalyst was used for the enantioselective preparation of a series of biol. active 1,2- and 1,4-pyranonaphthoquinones, e.g. I, from aliphatic and aromatic α,β-unsaturated aldehydes and 2-hydroxy-1-4-naphthoquinone. A trimethylsilyl-protected diarylprolinol serves as the Lewis base organocatalyst.

Angewandte Chemie, International Edition published new progress about Addition reaction catalysts. 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Safety of 3-(4-Bromophenyl)acrylaldehyde.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Jian-Yuan; Miklossy, Gabriella; Modukuri, Ram K.; Bohren, Kurt M.; Yu, Zhifeng; Palaniappan, Murugesan; Faver, John C.; Riehle, Kevin; Matzuk, Martin M.; Simmons, Nicholas published the artcile< Palladium-Catalyzed Hydroxycarbonylation of (Hetero)aryl Halides for DNA-Encoded Chemical Library Synthesis>, Quality Control of 188813-04-9, the main research area is palladium catalyzed hydroxycarbonylation heteroaryl halide DNA encoded library synthesis.

A strategy for DNA-compatible, palladium-catalyzed hydroxycarbonylation of (hetero)aryl halides on DNA-chem. conjugates has been developed. This method generally provided the corresponding carboxylic acids in moderate to very good conversions for (hetero)aryl iodides and bromides, and in poor to moderate conversions for (hetero)aryl chlorides. These conditions were further validated by application within a DNA-encoded chem. library synthesis and subsequent discovery of enriched features from the library in selection experiments against two protein targets.

Bioconjugate Chemistry published new progress about Carbonylation. 188813-04-9 belongs to class bromides-buliding-blocks, and the molecular formula is C8H7BrO, Quality Control of 188813-04-9.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Nonami, Reina; Morimoto, Yusei; Kanemoto, Kazuya; Yamamoto, Yasunori; Shirai, Tomohiko published the artcile< Cationic Iridium-Catalyzed Asymmetric Decarbonylative Aryl Addition of Aromatic Aldehydes to Bicyclic Alkenes>, Product Details of C7H6BrNO2, the main research area is formylphenyl acetamide norbornene iridium catalyst enantioselective decarbonylation; norbornanyl phenyl acetamide preparation; C−H bond activation; asymmetric catalysis; cationic iridium; decarbonylation; decarbonylative arylation.

An unprecedented catalytic protocol for the enantioselective decarbonylative transformation of aryl aldehydes. In this process, the decarbonylation of aldehydes catalyzed by chiral iridium complexes enabled the formation of asym. C-C bonds through the formation of an aryl-iridium intermediate. The decarbonylative aryl addition to bicyclic alkenes were fluidly performed without a stoichiometric aryl-metal reagent, such as aryl boronic acid, with a cationic iridium complex generated in-situ from Ir(cod)2(BArF4) and the sulfur-linked bis(phosphoramidite) ligand ((R,R)-S-Me-BIPAM). This reaction has broad functional group compatibility and no waste was generated, except carbon monoxide.

Chemistry – A European Journal published new progress about Acid chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 20776-50-5 belongs to class bromides-buliding-blocks, and the molecular formula is C7H6BrNO2, Product Details of C7H6BrNO2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary