Category: imidazoles-derivatives

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Cyclobutanone》. Authors are Conia, Jean Marie; Leriverend, Pierre; Ripoll, Jean Louis.The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).Reference of Pentaerythrityltetrabromide. Through the article, more information about this compound (cas:3229-00-3) is conveyed.

A procedure for the economical preparation of cyclobutanone (I) from pentaerythritol (II) was worked out. A mixture of 700 g. II, 1300 g. 62% HBr, 700 g. 48% HBr and 600 g. AcOH was refluxed 15 hrs. and then distilled to give 1300 g. pentaerythritol tribromide (III), b12 170-80°, m. 90-5°. To 1400 g. III heated to 180° and stirred was slowly added 600 g. PBr3, the temperature not to exceed 200°. After 15 hrs. at 180°, the mixture was cooled and poured into 3 l. H2O to give 1400 g. pentaerythritol tetrabromide (IV), m. 155° (EtOH). Methylenecyclobutane (V) was prepared from IV in 60-85% yield by the method of Shand, et al. (CA 38, 26342). Ozone was passed (100 l./hr.) for about 7 hrs. through a mixture of 30 g. V, 15 g. pyridine, and 200 ml. CH2Cl2 cooled to -80°. The unreacted ozone was swept out by O and the cooling bath withdrawn. When the temperature of the stirred solution reached -20°, an exothermic reaction set in. By cooling again the temperature was kept below 0°, then brought up to room temperature overnight. The solution was decanted from some brown tar, 10 ml. concentrated HCl added, the mixture stirred 2 hrs. and the upper aqueous layer removed. The organic layer was dried with CaCl2 and fractionated to yield 22 g. I, b. 97-100°, n21D 1.4205; 2,4-dinitrophenylhydrazone m. 144-5°.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Design and Synthesis of 56 Shape-Diverse 3D Fragments, published in 2020-07-25, which mentions a compound: 1116-98-9, mainly applied to alkyl piperidine pyrrolidine fragment diastereoselective preparation; 3D fragments; conformational diversity; fragment-based drug discovery; medicinal chemistry; synthesis design, Electric Literature of C7H11NO2.

Fragment screening collections were often predominantly populated with flat, 2D mols. A workflow for the design and synthesis of 56 3D disubstituted pyrrolidine and piperidine fragments that occupy under-represented areas of fragment space (as demonstrated by a principal moments of inertia (PMI) anal.) was described. A key, and unique, underpinning design feature of this fragment collection was that assessment of fragment shape and conformational diversity (by considering conformations up to 1.5 kcal mol-1 above the energy of the global min. energy conformer) was carried out prior to synthesis and was also used to select targets for synthesis. The 3D fragments were designed to contain suitable synthetic handles for future fragment elaboration. Finally, by comparing our 3D fragments with six com. libraries, it was clear that our collection was high three-dimensionality and shape diversity.

If you want to learn more about this compound(tert-Butyl 2-cyanoacetate)Electric Literature of C7H11NO2, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(1116-98-9).

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Imidazole – Wikipedia,
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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: tert-Butyl 2-cyanoacetate, is researched, Molecular C7H11NO2, CAS is 1116-98-9, about Quaternary stereocentres via catalytic enantioconvergent nucleophilic substitution reactions of tertiary alkyl halides.SDS of cas: 1116-98-9.

The development of efficient methods, particularly catalytic and enantioselective processes, for the construction of all-carbon quaternary stereocentres is an important (and difficult) challenge in organic synthesis due to the occurrence of this motif in a range of bioactive mols. One conceptually straightforward and potentially versatile approach is the catalytic enantioconvergent substitution reaction of a readily available racemic tertiary alkyl electrophile by an organometallic nucleophile; however, examples of such processes are rare. Here we demonstrate that a nickel-based chiral catalyst achieves enantioconvergent couplings of a variety of tertiary electrophiles (cyclic and acyclic α-halocarbonyl compounds) with alkenylmetal nucleophiles to form quaternary stereocentres with good yield and enantioselectivity under mild conditions in the presence of a range of functional groups. These couplings, which probably proceed via a radical pathway, provide access to an array of useful families of organic compounds, including intermediates in the total synthesis of two natural products, (-)-eburnamonine and madindoline A.

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Imidazole – Wikipedia,
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Related Products of 3724-19-4. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 3-Pyridinepropionic acid, is researched, Molecular C8H9NO2, CAS is 3724-19-4, about In vitro and in vivo anticancer activity of 2-deacetoxytaxinine J and synthesis of novel taxoids and their in vitro anticancer activity. Author is Reddy, K. Papi; Bid, Hemant K.; Nayak, V. Lakshma; Chaudhary, Preeti; Chaturvedi, J. P.; Arya, K. R.; Konwar, Rituraj; Narender, T..

The taxane diterpenoid 2-deacetoxytaxinine J (2-DAT-J; I) has been isolated from the bark of Himalayan yew, Taxus baccata L. spp. wallichiana in a reasonably good yield (0.1%) and its anticancer activity against breast cancer cell lines (MCF-7 and MDA-MB-231) and normal human kidney epithelial cell line (HEK-293) has been studied. 2-DAT-J showed significant in vitro activity against breast cancer cell line at a concentration of 20 μM and 10 μM in MCF-7 and MDA-MB-231 resp. A few novel taxoids were derived from the naturally occurring 2-DAT-J and screened for their anticancer activity. The structure-activity relationship studies indicated that the cinnamoyl group on C-5 and acetyl group on C-10 are essential for the anticancer activity. 2-DAT-J was also tested for its in vivo activity on DMBA-induced mammary tumors in virgin female Sprague Dawley rats at a dose of 10 mg/kg body weight orally for 30 days and showed significant regression in mammary tumors as compared to vehicle treated group (p < 0.05). Here is a brief introduction to this compound(3724-19-4)Related Products of 3724-19-4, if you want to know about other compounds related to this compound(3724-19-4), you can read my other articles.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 16961-25-4. 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: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Synthesis of ultra-small gold nanoparticles by polyphenol extracted from Salvia officinalis and efficiency for catalytic reduction of p-nitrophenol and methylene blue. Author is Oueslati, Mohamed Habib; Ben Tahar, Lotfi; Abdel Halim Harrath.

The present research work reports an eco-friendly route for preparing gold nanoparticles (AuNPs) with high catalytic activity using polyphenol extracted from salvia officinalis. In both alk. (pH ∼ 11) and acidic media (pH ∼ 5), the polyphenol induced rapid reduction of the Au (III) salt and lead to the formation of highly monodisperse and spherical small (S) and larger (L) AuNPs, resp. The average particle size was found to be ∼ 6 nm for S and ∼ 27 nm for L AuNPs, resp. FT-IR revealed that polyphenol species are capped onto the nanoparticles surface favorizing a high aqueous colloidal stability of the AuNPs in a wide pH range. In addition, the produced AuNPs exhibited significant size-dependent degradation rate of p-nitrophenol (p-NP) and methylene blue (MB) to p-aminophenol (p-AP) and leucomethylene blue (LMB), resp.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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: 4-(Bromomethyl)-1-chloro-2-fluorobenzene, is researched, Molecular C7H5BrClF, CAS is 206362-80-3, about Discovery of novel, potent, isosteviol-based antithrombotic agents.Quality Control of 4-(Bromomethyl)-1-chloro-2-fluorobenzene.

Thrombosis is a pathol. coagulation process and can lead to many serious thrombotic diseases. Here, we report a novel potent antithrombotic compound (6k) based on isosteviol with anticoagulant and antiplatelet activities. 6k selectively inhibited FXa (Ki = 0.015μM) against a panel of serine proteases and showed excellent anticoagulant activity (significant prolongation of ex vivo PT and aPTT over the vehicle, p < 0.01). 6k also significantly inhibited ADP-induced platelet aggregation in rats relative to the vehicle (p < 0.01). Furthermore, 6k exhibited potent ex vivo and in vivo antithrombotic activity in rats relative to the vehicle (p < 0.01 and p < 0.0001, resp.). Novel structure 6k, with potent antithrombotic activity, is expected to lead a promising approach for the development of antithrombotic agents. Here is a brief introduction to this compound(206362-80-3)Quality Control of 4-(Bromomethyl)-1-chloro-2-fluorobenzene, if you want to know about other compounds related to this compound(206362-80-3), you can read my other articles.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Studies of furan derivatives. I. Synthesis of chlorofuran derivatives, published in 1958, which mentions a compound: 58235-81-7, Name is Methyl 5-chlorofuran-2-carboxylate, Molecular C6H5ClO3, HPLC of Formula: 58235-81-7.

Tetrachloro-2-furoic acid (I) dissolved in methanol, dropped into methanolic NaOH solution, previously chilled below 0°, with stirring, the mixture kept 24 hrs., and methanol removed under reduced pressure, gave 3,4-dichloro-2-furoic acid (II), m. 167-8° (dilute EtOH). II (8 g.) heated in 50 cc. water at 100°, 20 g. 1% Na-Hg added gradually, and the mixture kept at 100° for 1 hr. with stirring, cooled, and acidified deposited 3.8 g. 3-chloro-2-furoic acid (III), m. 148-9° (water). III yielded a chloride (IV) with SOCl2. IV added 1 mole Cl; the mixture was distilled at room pressure, the fraction b. 180-20° gradually added to a cold ethanolic solution of NaOH with stirring, the deposit filtered off, and dissolved in water, and the solution acidified with HCl to give 5-chloro-2-furoic acid (V), yield 4%, m. 176-7° (dilute MeOH). A similar run with Me 5-chloro-2-furoate (VI), which was prepared from 30 g. V, 60 cc. ethanol, and 15 g. concentrated H2SO4, gave 3,5-dichloro-2-furancarboxylic acid (VII) in 22% yield, m. 155-6° (dilute methanol). The acid chloride of II (8 g.), heated with 0.8 g. Pd-BaSO4 (5%) and 75 cc. dry xylene in 140-5° oil bath while passing H with stirring, gave 3,4-dichlorofurfural in 83% yield, m. 52-3°. A similar run with the chlorides of III, VI, and VII gave 3-chlorofurfural (VIII), 60%, m. 28°, 5-chlorofurfural, 7%, m. 31-3%, and 3,5-chlorofurfural, 59%, m. 11-13°, b4 59-61°, resp.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Tan, Wen-Yun; Lu, Yi; Zhao, Jing-Feng; Chen, Wen; Zhang, Hongbin published an article about the compound: 3-Pyridinepropionic acid( cas:3724-19-4,SMILESS:OC(=O)CCC1=CC=CN=C1 ).Reference of 3-Pyridinepropionic acid. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:3724-19-4) through the article.

In this paper,a new chemoselective process for the oxidation of primary alcs. and aldehydes was reported. This metal-free reaction features a new oxidant, an easy to handle procedure, high isolated yields, and good to excellent functional group tolerance even in the presence of vulnerable secondary alcs. and tert-butanesulfinamides.

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Imidazole – Wikipedia,
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Product Details of 1116-98-9. 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: tert-Butyl 2-cyanoacetate, is researched, Molecular C7H11NO2, CAS is 1116-98-9, about An enantioconvergent halogenophilic nucleophilic substitution (SN2X) reaction. Author is Zhang, Xin; Ren, Jingyun; Tan, Siu Min; Tan, Davin; Lee, Richmond; Tan, Choon-Hong.

Bimol. nucleophilic substitution (SN2) plays a central role in organic chem. In the conventionally accepted mechanism, the nucleophile displaces a carbon-bound leaving group X, often a halogen, by attacking the carbon face opposite the C-X bond. A less common variant, the halogenophilic SN2X reaction, involves initial nucleophilic attack of the X group from the front and as such is less sensitive to backside steric hindrance. Herein, we report an enantioconvergent substitution reaction of activated tertiary bromides by thiocarboxylates or azides that, on the basis of exptl. and computational mechanistic studies, appears to proceed via the unusual SN2X pathway. The proposed electrophilic intermediates, benzoylsulfenyl bromide and bromine azide, were independently synthesized and shown to be effective.

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Imidazole – Wikipedia,
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Application In Synthesis of Tricyclohexylphosphonium tetrafluoroborate. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Tricyclohexylphosphonium tetrafluoroborate, is researched, Molecular C18H34BF4P, CAS is 58656-04-5, about Design and Synthesis of Polycyclic Imidazole-Containing N-Heterocycles based on C-H Activation/Cyclization Reactions. Author is Iaroshenko, Viktor O.; Ostrovskyi, Dmytro; Miliutina, Mariia; Maalik, Aneela; Villinger, Alexander; Tolmachev, Andrei; Volochnyuk, Dmitriy M.; Langer, Peter.

A new strategy for the synthesis of polycyclic imidazole-containing N-heterocycles, based on the two general synthetic ways, namely the Pd(II)-catalyzed intramol. arylation via CH/C-Hal and CH/CH coupling reactions, was developed (e.g., I → II). The method proposed here enables the synthesis of many fused N-heterocycles containing purine, 1-deazapurines and benzimidazole structural units.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem