Tag: M.W=100-200

Application of 4144-22-3. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1-(tert-Butyl)-1H-pyrrole-2,5-dione, is researched, Molecular C8H11NO2, CAS is 4144-22-3, about Cobalt(III)-catalyzed cross-coupling of enamides with allyl acetates/maleimides. Author is Yu, Wenlong; Zhang, Wei; Liu, Yue; Liu, Zhanxiang; Zhang, Yuhong.

Cp*Co(III)-catalyzed direct allylation of enamides RC(=CH2)NHC(O)CH3 (R = C6H5, 2-thienyl, 2-naphthyl, etc.) has been accomplished with the exclusive formation of allylated Z-enamides RC(=CHCH2CH=CH2)NHC(O)CH3 with high efficiency. In addition, the employment of maleimides I (R2 = H, Cy, Ph, etc.) as the reaction partner under the same catalytic conditions provides a series of succinimide-substituted Z-enamides II (R1 = C6H5, 2-thienyl, 1-naphthyl, etc.).

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

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Journal of Combinatorial Chemistry called Solution-phase parallel synthesis of novel membrane-targeted antibiotics, Author is Vooturi, Sunil K.; Firestine, Steven M., which mentions a compound: 37481-18-8, SMILESS is NCCN1CCCC2=C1C=CC=C2, Molecular C11H16N2, Electric Literature of C11H16N2.

The increase in the incidence of antibiotic-resistant infections is a major concern to healthcare workers and requires the development of novel antibacterial agents. Recently, we described a series of benzophenone-containing antibiotics which displayed activity against antibiotic-resistant bacteria. We have shown that these agents function by disrupting the bacterial membrane. To further explore these compounds, a practical and efficient solution-phase parallel synthesis method was developed which allowed us to prepare combinatorial libraries of these agents. Using this method, we prepared 218 compounds in 58 reactions, e.g. I. All of the compounds were characterized by HPLC and MALDI-TOF mass spectrometry. Anal. of this library for antibacterial activity identified six compounds which displayed MIC values of 2.0 mg/L against Staphylococcus aureus. Examination of the structure-function relationships of these agents revealed that cationic groups were required and that cyclic, aliphatic amines were crucial for activity. Using the information generated here, we speculate on how the various structural features of the mol. are necessary for the interaction with the bacterial membrane.

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Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 1-(tert-Butyl)-1H-pyrrole-2,5-dione, is researched, Molecular C8H11NO2, CAS is 4144-22-3, about Recent advances in photoinduced donor/acceptor copolymerization.Formula: C8H11NO2.

For certain combinations of A and D type monomers, a direct photolysis of the ground state complex or the excitation of the acceptor, followed by the formation of an exciplex, was shown to initiate the copolymerization The main route of initiation of free radical polymerization of donor (D)/acceptor (A) type monomers is based on inter or intra mol. H-abstraction from an excited state maleimide, whereby no exciplex formation takes place. H-abstraction will predominantly take place in systems where easily abstractable hydrogens are present. Laser flash photolysis studies, ESR, and phosphorescence emission studies show that triplet excited states of N-alkyl substituted maleimides (RMI), which are well known strong precursors for direct H-abstractions from aliphatic ethers and secondary alcs., are formed upon excitation. Rates of copolymerization and degrees of conversion for copolymerization of maleimide/vinyl ether pairs in air and nitrogen were measured as a function of hydrogen abstractability of the excited triplet state MI and the influence of concentration and hydrogen donating effect of the hydrogen donor.

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Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 2-((1R,5S)-6,6-Dimethylbicyclo[3.1.1]hept-2-en-2-yl)ethanol, is researched, Molecular C11H18O, CAS is 35836-73-8, about The photochemical nucleophile-olefin combination, aromatic substitution (photo-NOCAS) reaction. Part 5: methanol-monoterpenes (α- and β-pinene, tricyclene, and nopol), 1,4-dicyanobenzene, the main research direction is photochem nucleophile terpene olefin combination; aromatic substitution dicyanobenzene benzenedicarbonitrile.Category: chlorides-buliding-blocks.

The reactivity of the radical cations of α- and β-pinene (I and II), tricyclene (III), and nopol (IV) has been studied. The radical ions were generated, in acetonitrile-methanol (3:1), by single electron transfer (set) to the singlet excited state of 1,4-dicyclobenzene. Biphenyl was used as a codonor. The cyclobutane rings of the initially formed radical cations of I and II cleave to distonic radical cations that react as tertiary alkyl cations and allylic radicals. The results of ab initio MO calculations (STO-3G) are consistent with the observation that the pos. charge is largely associated with the tertiary alkyl moiety while the spin d. is largely distributed over the allylic radical. There was no evidence, exptl. or theor., indicative of a bonding interaction between the cationic and allylic moieties of these distonic radical cations. The cyclobutane ring cleavage is irreversible. The radical cation of III also gives 1:1:1 (nucleophile:cyclopropyl:aromatic) adducts. The regio- and stereochem. of the adducts, and the nucleophile selectivity, are all indicative of nucleophile-assisted cleavage of the radical cation. The radical cation of IV also cleaves to the distonic radical cation. The cyclobutane ring cleavage must be rapid; intramol. 1,5-endo cyclization of the hydroxy group cannot compete.

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Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Application In Synthesis of 2-((1R,5S)-6,6-Dimethylbicyclo[3.1.1]hept-2-en-2-yl)ethanol. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 2-((1R,5S)-6,6-Dimethylbicyclo[3.1.1]hept-2-en-2-yl)ethanol, is researched, Molecular C11H18O, CAS is 35836-73-8, about Stereospecific Synthesis of E-Alkenes through Anti-Markovnikov Hydroalkylation of Terminal Alkynes. Author is Hazra, Avijit; Chen, Jason; Lalic, Gojko.

The authors have developed a method for stereospecific synthesis of E-alkenes from terminal alkynes and alkyl iodides. The hydroalkylation reaction is enabled by a cooperative action of copper and nickel catalysts and proceeds with excellent anti-Markovnikov selectivity. The authors demonstrate the broad scope of the reaction, which can be accomplished in the presence of esters, nitriles, aryl bromides, ethers, alkyl chlorides, anilines, and a wide range of nitrogen-containing heteroaromatic compounds Mechanistic studies provide evidence that the copper catalyst activates the alkyne by hydrocupration, which controls both the regio- and diastereoselectivity of the overall reaction. The nickel catalyst activates the alkyl iodide and promotes cross coupling with the alkenyl copper intermediate.

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Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Name: 1-(tert-Butyl)-1H-pyrrole-2,5-dione. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 1-(tert-Butyl)-1H-pyrrole-2,5-dione, is researched, Molecular C8H11NO2, CAS is 4144-22-3, about Visible Light Mediated Cyclization of Tertiary Anilines with Maleimides Using Nickel(II) Oxide Surface-Modified Titanium Dioxide Catalyst.

Surface-modified titanium dioxides by highly dispersed NiO particles have an extended absorption in the visible light region and a reduced hole-electron pair recombination than unmodified TiO2. They have now been successfully applied as highly active heterogeneous photocatalysts in the visible light mediated direct cyclization of tertiary anilines with maleimides to give tetrahydroquinoline products in moderate to high yields at ambient temperature In contrast with unmodified titanium dioxide catalysts that are conventionally used in a stoichiometric amount in combination with UVA light, only a catalytic amount (1 mol %) of the surface-modified TiO2 catalyst is needed along with visible light to efficiently catalyze the reaction. Compared with transition-metal complexes such as Ru(bpy)3Cl2 or Ir(ppy)2(dtbbpy)PF6, advantages of these surface-modified titanium dioxides as photocatalyst include high catalytic activity, low cost, ease of recovering, and being able to be used for at least nine times without significant decay of catalytic activity.

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Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

SDS of cas: 498-95-3. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Piperidine-3-carboxylic acid, is researched, Molecular C6H11NO2, CAS is 498-95-3, about Synthesis and Biological Evaluation of Nipecotic Acid and Guvacine Derived 1,3-Disubstituted Allenes as Inhibitors of Murine GABA Transporter mGAT1. Author is Schaarschmidt, Maren; Hoefner, Georg; Wanner, Klaus T..

A new class of nipecotic acid I [R = Ph, 2-fluorophenyl, 4-biphenyl, etc.] and guvacine derivatives II [R1 = 2,4-difluoropheny, 2,4-dichlorophenyl, 2-phenylphenyl] were synthesized and characterized for their inhibitory potency at mGAT1-4 and binding affinity for mGAT1. Compounds I and II were defined by a four-carbon-atom allenyl spacer connecting the nitrogen atom of the nipecotic acid or guvacine head with an aromatic residue. Among the compounds investigated, the mixture of nipecotic acid derivatives I [R = terphenyl] possessing an o-terphenyl residue, was identified as highly selective and the most potent mGAT1 inhibitor in this study. For the (R)-nipecotic acid derived from of compound I [R = terphenyl], the inhibitory potency in [3H]GABA uptake assays was determined as pIC50=6.78±0.08, and the binding affinity in MS Binding Assays as pKi=7.10±0.12. The synthesis of the designed compounds I and II was carried out by a two-step procedure, generating the allene moiety via allenylation of terminal alkynes which allowed broad variation of the terminal Ph and biphenyl subunit.

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Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Synthetic Route of C11H18O. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 2-((1R,5S)-6,6-Dimethylbicyclo[3.1.1]hept-2-en-2-yl)ethanol, is researched, Molecular C11H18O, CAS is 35836-73-8, about Radical chain monoalkylation of pyridines. Author is Rieder, Samuel; Melendez, Camilo; Denes, Fabrice; Jangra, Harish; Mulliri, Kleni; Zipse, Hendrik; Renaud, Philippe.

The monoalkylation of N-methoxypyridinium salts with alkyl radicals generated from alkenes (via hydroboration with catecholborane), alkyl iodides (via iodine atom transfer) and xanthates to afford alkylated quinoline derivatives R-R1 [R = 4-methylquinolinyl, 4-Cl-quinolinyl, 3-Br-quinolinyl, etc.; R1 = Et, iPr, cyclohexyl, etc.] and pyridine derivatives R2-R3 [R2 = 4-phenylpyridinyl, 4-tBu-pyridinyl, 4-Br-pyridinyl, etc.; R3 = iPr, 1-adamantyl, cyclohexyl, etc.] was reported. The reaction proceeded under neutral conditions since no acid was needed to activate the heterocycle and no external oxidant was required. A rate constant for the addition of a primary radical to N-methoxylepidinium >107 M-1 s-1 was exptl. determined This rate constant was more than one order of magnitude larger than the one measured for the addition of primary alkyl radicals to protonated lepidine demonstrating the remarkable reactivity of methoxypyridinium salts toward radicals. The reaction was used for the preparation of unique pyridinylated terpenoids and was extended to a three-component carbopyridinylation of electron-rich alkenes including enol esters, enol ethers and enamides.

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

Related Products of 4144-22-3. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1-(tert-Butyl)-1H-pyrrole-2,5-dione, is researched, Molecular C8H11NO2, CAS is 4144-22-3, about C2-symmetric bisamidines: chiral Bronsted bases catalysing the Diels-Alder reaction of anthrones. Author is Akalay, Deniz; Duerner, Gerd; Bats, Jan W.; Goebel, Michael W..

C2-sym. bisamidines 8 have been tested as chiral Bronsted bases in the Diels-Alder reaction of anthrones and N-substituted maleimides. High yields of cycloadducts and significant asym. inductions up to 76% ee are accessible. The proposed mechanism involves proton transfer between anthrone and bisamidine, association of the resulting ions and finally a cycloaddition step stereoselectively controlled by the chiral ion pair.

Although many compounds look similar to this compound(4144-22-3)Related Products of 4144-22-3, numerous studies have shown that this compound(SMILES:O=C(C=C1)N(C(C)(C)C)C1=O), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

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

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 4144-22-3, is researched, SMILESS is O=C(C=C1)N(C(C)(C)C)C1=O, Molecular C8H11NO2Journal, Advanced Synthesis & Catalysis called 1,2-Diamine-Derived (thio)Phosphoramide Organocatalysts in Asymmetric Michael Additions, Author is Kozma, Viktoria; Fueloep, Ferenc; Szollosi, Gyoergy, the main research direction is aldehyde ketone maleimide asym Michael addition phosphoramide thiophosphoramide catalyst; phosphoramide thiophosphoramide diamine catalyst preparation.Name: 1-(tert-Butyl)-1H-pyrrole-2,5-dione.

Phosphoramides and thiophosphoramides were prepared from optically pure C2-sym. 1,2-diamines and were used as chiral organocatalysts in the asym. Michael additions of aldehydes and ketones to N-substituted maleimides. The 1,2-diphenylethane-1,2-diamine derived thiophosphoramide, which could be prepared in good yield in a one-step procedure, was found to be more active and selective catalyst in the addition of aldehydes to various maleimide derivatives, when compared to sulfonamides having the same backbone. Products resulted in reactions of ketones with maleimides were also obtained in high yields and enantioselectivities. The thiophosphoramide derivative was also efficient in the asym. conjugate addition of carbonyl compounds to β-nitrostyrene and in the reaction of nitromethane with α,β-unsaturated ketones. Based on results obtained with (thio)phosphoramides in asym. additions to maleimides it was suggested that a weaker, more flexible hydrogen-bonding of the rigid electrophile to the catalyst is responsible for the improved performance of these bifunctional organocatalysts, as compared with sulfonamides.

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