Tag: M.W=100-200

Electric Literature of C10H10ClNO. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about New synthesis of N-aryl- and N-alkylpyrrolidones, and some of their properties. Author is Kukalenko, S. S.; Gracheva, N. A..

N-Aryl pyrrolidinones (I) [R = 2,3-Me2C6H3, 2-ClC6H4, 4-ClC6H4, 3,4-Cl2C6H3, 4-BrC6H4, and 2,4-(MeO)BrC6H3] were prepared with 85-98% yield by heating equimolar amounts of γ-butyrolactone (II) and hydrochlorides of primary aromatic amines at 60-210° for 4-20 hr. The reaction of II with hydrochlorides of aliphatic amines proceeds with difficulty and the yield of the corresponding N-alkyl pyrrolidinones is 20-33%. All the pyrrolidinones are active fungicides.

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Related Products of 7661-33-8. 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: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Copper-catalyzed C-N coupling of amides and nitrogen-containing heterocycles in the presence of cesium fluoride. Author is Phillips, Dean P.; Zhu, Xue-Feng; Lau, Thomas L.; He, Xiaohui; Yang, Kunyong; Liu, Hong.

The copper-catalyzed C-N coupling of amides to aryl halides usually requires the use of strong alkali metal bases, such as K2CO3, K3PO4, and Cs2CO3, at high temperature We discovered that CsF is sufficiently basic to promote the cross-coupling of amides and carbamates with aryl halides. Most aryl iodides coupled in high yield at room temperature This alternative base may be a suitable replacement for substrates that are incompatible with high temperature and strongly basic conditions and can further enhance the chemoselectivity of this reaction.

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Category: alcohols-buliding-blocks. 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-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Decrease in intestinal permeability to polyethylene glycol 1000 during development in the pig. Author is Westroem, B. R.; Tagesson, C.; Leandersson, P.; Folkesson, H. G.; Svendsen, J..

Changes in intestinal permeability during postnatal development in the pig were investigated by using different-sized polyethylene glycols (PEGs) in the Mr 766-1338 range (PEG 1000) as permeability probes. Pigs of varying age, newborn (0 h), 36-45 h old, and 22-28 days old, were gavage-fed PEG 1000 together with the macromol. markers bovine serum albumin, ovalbumin, or FITC-labeled dextran 70,000. The 4-h blood serum concentrations of the different markers were determined and taken as an estimate of their intestinal transmission. In the newborn pigs, high serum levels of PEGs were obtained, concomitant with high serum levels of bovine serum albumin and FITC-dextran. After intestinal macromol. closure in the 36-45 h-old pigs, lower serum PEG levels were found, especially of those with a Mr > 1100 Da. In the 22-28 day-old pigs, PEG levels were reduced to ≤10% of those in the 36-45-h-old pigs, with the levels decreasing markedly with increasing mol. size. These results show that there is a correlation between the intestinal permeability of PEGs, especially those >1100 Da, and macromols. in the newborn pig around intestinal closure, suggesting that such PEGs traverse the gut by the macromol. route. During later development, further intestinal maturation results in a markedly reduced permeability to PEG 1000.

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Quality Control of 1-(4-Chlorophenyl)pyrrolidin-2-one. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Selective Copper-Catalyzed N-Arylation of Lactams with Arylboronic Acids under Base- and Ligand-Free Conditions. Author is Bathini, Thulasiram; Rawat, Vikas Singh; Sreedhar, Bojja.

An oxidative copper-catalyzed cross-coupling of arylboronic acids with various ring-size lactams has been developed. The N-arylated lactams were obtained in moderate to excellent yields without any addnl. bases, ligands, or additives. This reaction shows complete selectivity for N-arylation of lactams in the presence of a hydroxyl group.

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Recommanded Product: Pyridine-3,5-dicarbonitrile. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Pyridine-3,5-dicarbonitrile, is researched, Molecular C7H3N3, CAS is 1195-58-0, about Electron-Deficient Heteroarenium Salts: An Organocatalytic Tool for Activation of Hydrogen Peroxide in Oxidations. Author is Sturala, Jiri; Bohacova, Sona; Chudoba, Josef; Metelkova, Radka; Cibulka, Radek.

A series of monosubstituted pyrimidinium and pyrazinium triflates and 3,5-disubstituted pyridinium triflates were prepared and tested as simple catalysts of oxidations with hydrogen peroxide, using sulfoxidation as a model reaction. Their catalytic efficiency strongly depends on the type of substituent and is remarkable for derivatives with an electron-withdrawing group, showing reactivity comparable to that of flavinium salts which are the prominent organocatalysts for oxygenations. Because of their high stability and good accessibility, 4-(trifluoromethyl)pyrimidinium and 3,5-dinitropyridinium triflates are the catalysts of choice and were shown to catalyze oxidation of aliphatic and aromatic sulfides to sulfoxides, giving quant. conversions, high preparative yields and excellent chemoselectivity. The high efficiency of electron-poor heteroarenium salts is rationalized by their ability to readily form adducts with nucleophiles, as documented by low pKR+ values (pKR+ < 5) and less neg. reduction potentials (Ered > -0.5 V). Hydrogen peroxide adducts formed in situ during catalytic oxidation act as substrate oxidizing agents. The Gibbs free energies of oxygen transfer from these heterocyclic hydroperoxides to thioanisole, obtained by calculations at the B3LYP/6-311++g(d,p) level, showed that they are much stronger oxidizing agents than alkyl hydroperoxides and in some cases are almost comparable to derivatives of flavin hydroperoxide acting as oxidizing agents in monooxygenases.

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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 Dihydropyridines. VII. Reactions of symmetrically alkylated 3,5-dicyanopyridines with sodium borohydride, published in 1964, which mentions a compound: 1195-58-0, Name is Pyridine-3,5-dicarbonitrile, Molecular C7H3N3, Application In Synthesis of Pyridine-3,5-dicarbonitrile.

cf. ibid. 1495; CA 60, 6817d. NaBH4 reduction of 3,5-dicyanopyridines I-VI gave 3,5-dicyano-1,2- and 1,4-dihydropyridines VII-XVII. I and LiAlH4 gave a mixture of VII and VIII which was separated by chromatography. Two procedures were used in the reduction of I-VI: Method A. EtOH (0.2 ml.) was added to a mixture of 38 mg. NaBH4 and 0.001 mole ground I-VI, and the precipitated product washed with 2.5 ml. cold H2O. Method B. NaBH4 (150 mg.) was added to a mixture of 0.002 mole I-VI and 5 ml. EtOH, the solution diluted with H2O to ∼80 ml. after several hrs., and the precipitated filtered off (starting compound, method, product, % yield, and m.p. given): I, B, VIII, 62, 205-6° (dilute EtOH); I, A, VII, 188-9° (Me2CO-cyclohexane) (VIII was also obtained); II, A, IX, 50, 214-15° (dilute EtOH); III, A, X + XI (92:8), 44, 154-72° (mixture); IV, B, XII, 89, 232-3° (MeOH); V, B, XIV + XV (71:29), 69, 138-69° (mixture); VI, -, XVI + XVII (86:14), 77, 108-22° (mixture). Similar results were obtained by reduction of I-IV with LiAlH4. Oxidation of 1.73 g. 3,5-dicyano-2-methyl-4-ethyl-1,2-dihydropyridine in 70 ml. EtOH with Ag2O from 7 g. AgNO3 gave 91% 3,5-dicyano-2-methyl-4-ethylpyridine (XVIII), m. 68-8.5°, sublimed 55-60°/0.4 mm. Treatment of 1.28 g. XVIII with MeMgI prepared from 750 mg. Mg and 1.9 ml. MeI gave 61% XVII, m. 101-2° (dilute acetone), which was oxidized with MnO2 to VI, m. 70-1°.

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Synthetic Route of C7H3N3. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Pyridine-3,5-dicarbonitrile, is researched, Molecular C7H3N3, CAS is 1195-58-0, about Synthesis and reactions of 3-methyl-5-cyanopyridine under oxidative ammonolysis conditions. Author is Suvorov, B. V.; Belova, N. A..

V2O5-TiO2 (1:32) was recommended over 1:16 V2O5-TiO2, 1:0.5 V2O5-SnO2 and 2:1 V2O5-Fe2O3 for the title synthesis, >90% selectivity with 100% 3,5-butadiene (I) conversion at 340° with 1:24:10:10-40 I-O2-NH3-H2O. The 3,5-dicyanopyridine yield was 4.2-5.3% under these conditions, but reached 65.2% at 380° in the absence of H2O.

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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: 1195-58-0, is researched, SMILESS is N#CC1=CC(C#N)=CN=C1, Molecular C7H3N3Journal, Collection of Czechoslovak Chemical Communications called Dihydropyridines. XV. Reactions of some 3,5-dicyanopyridines with complex aluminum hydrides, Author is Kuthan, Josef; Prochazkova, J.; Janeckova, E., the main research direction is aluminum hydrides pyridines reduction; hydrides aluminum pyridines reduction; pyridines reduction aluminum hydrides; reduction pyridines aluminum hydrides.Electric Literature of C7H3N3.

The effect of 4 complex Al hydrides on the formation of the 1,2- and 1,4-dihydro derivatives was studied. The reductions were carried out in tetrahydrofuran or Et2O and the products separated by thin layer chromatography (the starting compound I, reagent, % yield of the mixture, product(s), and their ratio given): I (R1 = R2 = H), LiAlH4, NaAlH4, NaAlH2(OEt)2, 41-98, II (R1 = R2 = H), III (R1 = R2 = H), 44-7: 53-6; I (R1 = R2 = H), NaAlH2(OCH2CH2OMe)2, 12, II (R1 = R2 = H), 100%; I (R1 = H, R2 = Me), LiAlH4, 36, III (R1 = H, R2 = Me), 100%; I (R1 = H, R2 = Et), LiAlH4, 25, II (R1 = H, R2 = Et), III (R1 = H, R2 = Et), 91:9; I (R1 = Me, R2 = H), LiAlH4, 80, II (R1 = Me, R2 = H), 100%; I (R1 = R2 = Me), LiAlH4, 65, II (R1 = R2 = Me), III (R1 = R2 = Me), 43:57; and I (R1 = Me, R2 = Et), LiAlH4, 48, II (R1 = Me, R2 = Et), III (R1 = Me, R2 = Et), 20:80.

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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 Regioselective metalation of the 4-position of pyridine. New and convenient alkylation and acylation of 3-amino-5-methoxypyridine, published in 1981-08-14, which mentions a compound: 77903-28-7, mainly applied to regioselective lithiation pyridine derivative; alkylation pyridinamine; acylation pyridinamine, Computed Properties of C7H10N2O.

The reaction of 3-methoxy-5-pivaloylaminopyridine with BuLi at low temperature in THF gives the 4-lithiopyridines, which react with various electrophiles to give the corresponding 4-substituted 3-methoxy-5-pivaloylaminopyridines. The conversion of the 5-pivaloylamino group to other substituents via the pyridyl radical was also examined

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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 Electrochemical reduction of cyanopyridines. General mechanism, published in 1972, which mentions a compound: 1195-58-0, Name is Pyridine-3,5-dicarbonitrile, Molecular C7H3N3, Related Products of 1195-58-0.

Electrochem. reduction of mono- and dicyanopyridines at a Hg electrode proceded via intermediates containing a cyclic π-electron septet formed after uptake of the 1st electron; these intermediates underwent either protonation, dimerization, or further 1-electron reduction, depending on the position of the cyano group(s), the acidity of the medium, and the electrode potential. This mechanism was substantiated by LCAO-MO and SCF calculations; the exptl. half-wave potentials were correlated to the energy of the lowest free MO of the substrate.

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