Category: chlorides-buliding-blocks

Lee, Ho H.; Denny, William A. published the artcile< An improved synthesis of substituted dibenzo[1,4]dioxines>, Category: chlorides-buliding-blocks, the main research area is catechol cyclocondensation halobenzene; dibenzodioxine.

An improved general synthesis of substituted dibenzo[1,4]dioxines I (R = H, 1-Cl, 2-Cl, 1-NO2, 2-NO2, 1-CO2R1, 2-CO2CHMe2; R1 = H, Me, CHMe2) by reaction of 2-HOC6H4OH and R2C6H3R3R4-1,2 (R2 = H, 3-Cl, 3-NO2, 3-CO2R1, 4-Cl, 4-NO2; R3 = R4 = Cl, F, NO2; R3, R4 = Cl, NO2) with K in HMPA is reported. The yields are generally superior to those in published methods.

Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) published new progress about Cyclocondensation reaction. 2905-54-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H6Cl2O2, Category: chlorides-buliding-blocks.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Javed, Erman; Guthrie, Jacob D.; Neu, Justin; Chirayath, George S.; Huo, Shouquan published the artcile< Introducing an α-Keto Ester Functional Group through Pt-Catalyzed Direct C-H Acylation with Ethyl Chlorooxoacetate>, Recommanded Product: 4-Chloro-2-methoxyphenol, the main research area is aryloxy pyridine chlorooxoacetate platinum catalyst regioselective acylation; aryl oxoacetate preparation.

Platinum-catalyzed selective C-H acylation of 2-aryloxypyridines with Et chlorooxoacetate provided an efficient way of introducing an α-keto ester functional group. The reaction is oxidant-free, additive-free and more significantly free of any decarbonylative side reactions. The reaction tolerated a variety of substituents from strongly electron-donating to strongly electron-withdrawing groups. Double acylation was feasible for 2-phenoxypyridine and its derivatives with only one substituent at the para position. Although the reaction of 2-(2-methylphenoxy)pyridine with Et malonyl chloride did not produce the desired β-keto ester, the reaction with Et succinyl chloride proceeded smoothly to give the γ-keto ester. Et chlorooxoacetate was much more reactive than Et succinyl chloride in this Pt-catalyzed C-H acylation reaction.

ACS Omega published new progress about Acylation catalysts (regioselective). 16766-30-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C7H7ClO2, Recommanded Product: 4-Chloro-2-methoxyphenol.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Hanessian, Stephen; Therrien, Eric; van Otterlo, Willem A. L.; Bayrakdarian, Malken; Nilsson, Ingemar; Fjellstroem, Ola; Xue, Yafeng published the artcile< Phenolic P2/P3 core motif as thrombin inhibitors - design, synthesis, and X-ray co-crystal structure>, Formula: C7H6Cl2O2S, the main research area is trisubstituted phenol preparation thrombin inhibitor.

Prototypical thrombin inhibitors were synthesized based on a trisubstituted phenol as a core motif. A naphthylsulfonamide analog (I) showed excellent antithrombin activity. An X-ray co-crystal structure of I bound to thrombin showed the expected interactions.

Bioorganic & Medicinal Chemistry Letters published new progress about Phenols Role: PAC (Pharmacological Activity), SPN (Synthetic Preparation), BIOL (Biological Study), PREP (Preparation). 42413-03-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C7H6Cl2O2S, Formula: C7H6Cl2O2S.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Yang, Yongjie; Jiang, Kai; Zhu, Hua; Yin, Biaolin published the artcile< Synthesis of Highly Conjugated Functionalized 2-Pyridones by Palladium-Catalyzed Aerobic Oxidative Dicarbonation Reactions of N-(Furan-2-ylmethyl) Alkyne Amides and Alkenes as Coupling Partners>, COA of Formula: C9H5ClO2, the main research area is furanylmethylpropynamide ethene palladium catalyst diastereoselective aerobic oxidative dicarbonation; oxopropenyl ethenyl pyridinone preparation.

A mild, step-economical method for the synthesis of highly conjugated functionalized 2-pyridones from N-(furan-2-ylmethyl) alkyne amides was reported. This method involved Pd-catalyzed aerobic oxidative dicarbonation reactions of alkynes with carbon nucleophiles of a furan ring and an acrylate or styrene as coupling partners. The UV-vis absorption spectra of some of the 2-pyridones indicated that they absorbed shortwave radiation, suggested their potential utility for filtration of such radiation.

Journal of Organic Chemistry published new progress about Alkenes Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 3240-10-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H5ClO2, COA of Formula: C9H5ClO2.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Farran, Daniel; Bertrand, Philippe published the artcile< Hammett constants effects in microwave cascade etherification-cyclization-Krapcho reaction to access [2,3]-dihydrobenzofuran-3-ones from salicylic derivatives>, Product Details of C8H7ClO3, the main research area is salicylate bromopropionate etherification cyclization Krapcho cascade microwave Hammett constant; hydrobenzofuranone preparation.

Two methods were evaluated for the synthesis of substituted 2,3-dihydro-2-methylbenzofuran-3-ones from the corresponding salicylate esters under microwave irradiation A 2-step sequence via ether intermediates was convenient for various substituted salicylate derivatives, while the 2nd strategy involving a 1-pot procedure was efficient for electron-donating substituted salicylates. Results allowed correlation of the Hammett constants effects in the intramol. cyclization of O-ethoxycarbonyl ethers of salicylic esters.

Synthetic Communications published new progress about Aromatic hydroxycarboxylic acids Role: RCT (Reactant), RACT (Reactant or Reagent) (esters). 22717-55-1 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H7ClO3, Product Details of C8H7ClO3.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Zhang, Kun; Jelier, Benson; Passera, Alessandro; Jeschke, Gunnar; Katayev, Dmitry published the artcile< Synthetic Diversity from a Versatile and Radical Nitrating Reagent>, Product Details of C8H6ClNO2, the main research area is nitroalkene preparation diastereoselective regioselective chemoselective; alkene nitrosuccinimide nitration ruthenium photocatalyst; nitrohydrin preparation regioselective chemoselective; ketone alkene nitrosuccinimide nitration ruthenium photocatalyst; isoxazoline preparation regioselective chemoselective; nitrosuccinimide ketone alkene dipolar cycloaddition ruthenium photocatalyst; isoxazole preparation regioselective chemoselective; alkyne nitrosuccinimide ketone dipolar cycloaddition ruthenium photocatalyst; C−H nitration; alkenes; photoredox; radicals; reaction mechanisms.

A new methodol. was described for the activation of N-nitrosuccimide for the direct synthesis of β-nitroalkenes, β-nitrohydrins, β-nitroethers, isoxazolines I [R = Me, cyclopropyl; R1 = n-heptyl, Bn, CH2OPh; R2 = H, R1R2 = (CH2)4, (CH2)9, (CH2)10C(O)(CH2)3; R3 = H, Me] and isoxazoles II [R4 = CO2Et, CH2CH2Br, cyclohexyl, etc.]. Detailed mechanistic studies strongly suggested that a mesolytic N-N bond fragmentation liberates a nitryl radical. Using in situ photo-sensitized, ESR spectroscopy, direct evidence of a nitryl radical in solution by nitrone spin-trapping was observed To further exhibit versatility of N-nitrosuccinimide under photoredox conditions, the late-stage diversification of an extensive number of C-H partners to prepare isoxazolines I and isoxazoles II was presented. This approach allowed for the formation of an in situ nitrile oxide from a ketone partner, the presence of which was detected by the formation of the corresponding furoxan when conducted in the absence of a dipolarophile. This 1,3-dipolar cycloaddition with nitrile oxides and alkenes or alkynes proceeded in a single-operational step using a mild, regioselective and general protocol with broad chemoselectivity.

Chemistry – A European Journal published new progress about 1,3-Dipolar cycloaddition catalysts (regioselective). 5153-70-8 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H6ClNO2, Product Details of C8H6ClNO2.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Wang, Bingbing; Peng, Pan; Ma, Wan; Liu, Zhao; Huang, Cheng; Cao, Yangmin; Hu, Ping; Qi, Xiaotian; Lu, Qingquan published the artcile< Electrochemical Borylation of Alkyl Halides: Fast, Scalable Access to Alkyl Boronic Esters>, Synthetic Route of 16799-05-6, the main research area is electrochem borylation alkyl halide reduction mechanism DFT; alkyl boronic ester preparation electrochem; mol structure optimized boronic ester alkyl halide DFT.

Herein, a fast, scalable, and transition-metal-free borylation of alkyl halides (X = I, Br, Cl) enabled by electroreduction is reported. This process provides an efficient and practical access to primary, secondary, and tertiary boronic esters at a high current. More than 70 examples, including the late-stage borylation of natural products and drug derivatives, are furnished at room temperature, thereby demonstrating the broad utility and functional-group tolerance of this protocol. Mechanistic studies disclosed that B2cat2 serves as both a reagent and a cathodic mediator, enabling electroreduction of difficult-to-reduce alkyl bromides or chlorides at a low potential.

Journal of the American Chemical Society published new progress about Bond cleavage. 16799-05-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H8BrCl, Synthetic Route of 16799-05-6.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Zhang, Hong; Di, Shu-Sheng; Huang, Xiao-Bo; Zhou, Yun-Bing; Liu, Miao-Chang; Wu, Hua-Yue published the artcile< Direct dilithiation of N-aryl heterocycles for the construction of condensed N-heterocycles>, Electric Literature of 17082-09-6, the main research area is condensed heterocycle preparation; aryl heterocycle direct dilithiation acyl chloride trapping.

A 1,4-dilithio intermediate can be prepared from N-heterocycles by n-BuLi-promoted direct C-H dilithiation. The subsequent trapping of the 1,4-dilithio intermediate with acyl chlorides affords condensed N-heterocycles in high yields in a one-pot fashion. This protocol features a broad substrate scope, good efficiency, and high atom economy. The control experiments support the presence of a 1,4-dilithio intermediate.

Organic Chemistry Frontiers published new progress about Acid chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 17082-09-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H7ClO, Electric Literature of 17082-09-6.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Li, Zi-Hao; Fiser, Bela; Jiang, Biao-Lin; Li, Jian-Wei; Xu, Bao-Hua; Zhang, Suo-Jiang published the artcile< N-Hydroxyphthalimide/benzoquinone-catalyzed chlorination of hydrocarbon C-H bond using N-chlorosuccinimide>, COA of Formula: C4H4ClNO2, the main research area is hydroxyphthalimide benzoquinone catalyzed chlorination benzylic bond chlorosuccinimide.

The direct chlorination of C-H bonds has received considerable attention in recent years. In this work, a metal-free protocol for hydrocarbon C-H bond chlorination with com. available N-chlorosuccinimide (NCS) catalyzed by N-hydroxyphthalimide (NHPI) with 2,3-dicyano-5,6-dichlorobenzoquinone (DDQ) functioning as an external radical initiator is presented. Aliphatic and benzylic substituents and also heteroaromatic ones were found to be well tolerated. Both the experiments and theor. anal. indicate that the reaction goes through a process wherein NHPI functions as a catalyst rather than as an initiator. On the other hand, the hydrogen abstraction of the C-H bond conducted by a PINO species rather than the highly reactive N-centered radicals rationalizes the high chemoselectivity of the monochlorination obtained by this protocol as the latter is reactive towards the C(sp3)-H bonds of the monochlorides. The present results could hold promise for further development of a nitroxy-radical system for the highly selective functionalization of the aliphatic and benzylic hydrocarbon C-H.

Organic & Biomolecular Chemistry published new progress about C-H bond (hydrocarbon). 128-09-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C4H4ClNO2, COA of Formula: C4H4ClNO2.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Cheng, Hua; Shen, Yan-Qing; Pan, Xia-Yan; Hou, Yi-Ping; Wu, Qiong-You; Yang, Guang-Fu published the artcile< Discovery of 1,2,4-triazole-1,3-disulfonamides as dual inhibitors of mitochondrial complex II and complex III>, Reference of 35852-58-5, the main research area is triazoledisulfonamide preparation inhibitor mitochondria complex II III; antibacterial activity Xanthomonas.

Respiratory chain succinate-ubiquinone oxidoreductase (SQR or complex II) and ubihydroquinone-cytochrome (cyt) c oxidoreductase (cyt bc1 or complex III) have been demonstrated as the promising targets of numerous antibiotics and fungicides. As a continuation of our research work on the development of new fungicides, a series of 1,2,4-triazole-1,3-disulfonamide derivatives with dual functions targeting both SQR and cyt bc1 were designed and synthesized by coupling diverse di-Ph ether moieties with triazolesulfonamide units. These newly synthesized compounds were characterized by elemental analyses, 1H NMR and ESI-MS spectrometry. The in vitro assay indicated that most of the synthesized compounds displayed good inhibition against porcine succinate-cytochrome reductase (SCR) with IC50 values ranging from 3.2 to 81.8 μM, revealing much higher activity than that of the com. control amisulbrom whose IC50 value is 93.0 μM. Further evaluation against the resp. SQR and cyt bc1 indicated that most compounds exhibited SQR-inhibiting activity as well as cyt bc1-inhibiting activity, but the inhibition potency against SQR is much higher than that against cyt bc1, showing that the SCR inhibition might be contributed greatly by the SQR inhibition. The further antibacterial evaluation against Xanthomonas oryzae pv. oryzae revealed that four compounds showed excellent potency at the concentration of 20 μg mL-1. In particular, compounds (I) and (II) exhibited much better antibacterial activity than the com. control bismerthiazol in terms of their EC50. Impressively, II has an EC90 of 33.62 μg mL-1, more than 10-fold higher than that of bismerthiazol.

New Journal of Chemistry published new progress about Antibacterial agents. 35852-58-5 belongs to class chlorides-buliding-blocks, and the molecular formula is C7H4ClF3O, Reference of 35852-58-5.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics