Tag: M.W=100-200

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Carbon-13, nitrogen-15m, and oxygen-17 NMR chemical shifts of substituted 1-phenyl-2-pyrrolidinones, the main research direction is NMR phenylpyrrolidinone derivative.Name: 1-(4-Chlorophenyl)pyrrolidin-2-one.

The C-13 and N-15 NMR chem. shifts and the direct C-proton coupling constants of 1-phenyl-2-pyrrolidinone and its 2′-Me,3′-Me,4′-Me,2′-chloro,3′-chloro,4′-chloro,3′-methoxy,4′-methoxy and 4′-nitro derivatives were measured in di-Me sulfoxidde. The O-17 NMR chem. shifts of some of the compounds were determined in acetone. The effect of substituents on the chem. shifts of carbonyl carbons correlates well with the Hammett substituent parameters and the N chem. shifts seem to follow a similar trend. The variation of the O chem. shift due to the substituents is small. The chem. shifts of aromatic carbons can mainly be derived using the substituent parameters of benzene, some deviation probably due to steric effects is observable, however.

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Name: 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 A study of solvent effect on photochemically induced reactions between pyridinedicarbonitriles and alkenes: an easy approach to the synthesis of cyclopenta[b or c]pyridines. Author is Bernardi, Rosanna; Caronna, Tullio; Luogo, Daniela dal Pio; Morrocchi, Sergio; Poggi, Gabriella; Vittimberga, Bruno M..

Photochem. induced reactions of pyridinedicarbonitriles and alkenes showed an interesting dependence on solvent polarity. In non-polar solvents ipso-substitution of the cyano groups in positions α or γ to the heterocyclic nitrogen occurred to a larger extent, while in polar solvents the reaction provided a path to the formation of a new ring between the carbon atom of one of the cyano groups and a ring position, forming a cyclopenta[b]pyridine or cyclopenta[c]pyridine derivatives Studies on the multiplicity of the excited state controlling the reaction showed that the singlet state was involved in the ipso-substitution, while the triplet state controlled the formation of the pyridine. An explanation for the solvent effect was given in terms of shift of the excited states with the solvent used. Theor. calculations justified the position of the cyclization, although no correlation was found for the regioisomers ratio. This reaction represented an effective entry to the biol. interesting pyrindine systems.

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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 The reduction of pyridine derivatives with lithium aluminum hydride, published in 1953, which mentions a compound: 1195-58-0, mainly applied to , HPLC of Formula: 1195-58-0.

When pyridine derivatives (I) with CO2Et or CN groups at the 3- and 5-positions are treated with LiAlH4 (II) the ring system is attacked first; when the 2-, 4-, and 6-positions are substituted, the functional group are reduced. The reductions are carried out by adding a large excess of II in ether to the I in absolute ether with stirring and ice-cooling, treating the mixture with saturated NH4Cl solution, and evaporating the washed ether solution Reduction of 5 g. di-Et 2,6-lutidine-3,5-dicarboxylate in 50 cc. ether with 780 mg. II in 40 cc. ether gives 40% Et 3-hydroxymethyl-2,6-lutidine-5-carboxylate, m. 100-1°; when the mixture is refluxed 2 hrs. 65% 3,5-bis(hydroxymethyl)-2,6-lutidine, m. 141-2°, is obtained. Reduction of di-Me dinicotinate gives 50% di-Me 1,4-dihydrodinicotinate, m. 150-60°, λmaximum 220, 375 mμ (MeOH). Reduction of di-Me 2-methyl-dinicotinate also gives a dihydro derivative, b0.02 115-20°, yellow needles, m. 126°, λmaximum 220, 375 mμ (MeOH). Reduction of 10 g. 2-chloropyridine (III) with 1 g. II at 0° gives unchanged III. Reduction of 1 g. Et picolinate gives 2-pyridine methanol (picrate m. 159°). Reduction of Et 2-pyridyl-acetate gives 2-pyridineëthanol, b15 120° (picrate, m. 120°). Refluxing 50 g. dinicotinic acid with 150 cc. SOCl2 15 hrs. and treating the acid chloride with NH4OH give 26 g. diamide, m. 302°, which, warmed in 130 cc. C5H5N with 19 cc. POCl3 3 hrs at 60°, yields 15 g. dinitrile (IV), m. 113° after sublimation at 70°/1 mm. Reduction of 1 g. IV in 20 cc. ether with 300 mg. II in 10 cc. ether gives 1,4-dihydrodinicotinonitrile, yellow crystals, m. 197°, λmaximum 360 mμ (MeOH). Similar reduction of 0.43 g. 2,6-lutidine-3,5-dicarbonitrile gives the 1,4-dihydro derivative, yellow crystals, m. 225°, λmaximum 362.5 mμ (MeOH). Catalytic hydrogenation of 0.5 g. IV in 20 cc. MeOH 3 hrs. with 50 mg. PtO2, 0.5 g., gives a dihydro derivative with λmax. 360 mμ which reduces neutral AgNO3. Adding (0.5 hr.) 6.5 g. II in 300 cc. ether to 46 g. Me nicotinate in 300 cc. ether at 0°, decomposing the mixture with NH4Cl, and distilling the residue of the ether extract give 31.3 g. 3-pyridine methanol, b0.1 110° (picrate, m. 158-60°). The difference in the behavior of the pyridine esters and nitriles toward II is explained as resulting from the different polarization of the pyridine rings in these compounds

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Kukalenko, S. S.; Gracheva, N. A. published the article 《New synthesis of N-aryl- and N-alkylpyrrolidones, and some of their properties》. Keywords: aryl pyrrolidinones.They researched the compound: 1-(4-Chlorophenyl)pyrrolidin-2-one( cas:7661-33-8 ).Reference of 1-(4-Chlorophenyl)pyrrolidin-2-one. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:7661-33-8) here.

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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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1-(4-Chlorophenyl)pyrrolidin-2-one(SMILESS: O=C1N(C2=CC=C(Cl)C=C2)CCC1,cas:7661-33-8) is researched.Name: (S)-5-(Hydroxymethyl)dihydrofuran-2(3H)-one. The article 《Amidation of Aryl Chlorides Using a Microwave-Assisted, Copper-Catalyzed Concurrent Tandem Catalytic Methodology》 in relation to this compound, is published in Organometallics. Let’s take a look at the latest research on this compound (cas:7661-33-8).

A copper iodide-catalyzed concurrent tandem catalytic (CTC) methodol. has been developed for the amidation of aryl chlorides where the aryl chloride is first converted to an aryl iodide via halogen exchange and the aryl iodide is subsequently transformed into the N-aryl secondary or tertiary amide. A variety of aryl chlorides were converted to aryl amides in up to 85% isolated yield using 20 mol% CuI, 60 mol% N,N’-cyclohexane-1,2-diamine, 2.2 equiv of K2CO3, and 1.05-1.5 equiv of amide in acetonitrile at 200° after 0.75-1 h. The same copper/ligand system served as multifunctional catalyst for both steps of the concurrent catalytic process with iodide present in substoichiometric amounts Mechanistic studies are consistent with CTC amidation occurring via a nonradical mechanism. Kinetic modeling was conducted to investigate the effect of competitive direct amidation of an aryl chloride or aryl bromide on the formation of product over time during a CTC amidation reaction.

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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: 23002-78-0, is researched, SMILESS is CC(C1=CSC(C)=N1)=O, Molecular C6H7NOSJournal, Pharmazie called Heteroarylquinoxalines as thiabendazole analogs. Part 4: Synthesis of 2-thiazolylquinoxalines, Author is Sarodnick, G.; Kempter, G., the main research direction is thiabendazole analog thiazolylquinoxaline; quinoxaline thiazolyl thiabendazole analog.Computed Properties of C6H7NOS.

Thiazolylquinoxalines I (R1 = H, Me, Ph, NH2, CO2Et, R2 = H; R1 = H, Ph, NH2, CO2Et, R2 = Me) and II (R1 = Me, Ph) were prepared by 2 methods. In the 1st method, acetylthiazoles III and IV (R3 = Me) were converted to glyoxals III and IV (R3 = CHO), isonitroso ketones IV (R3 = CH:NOH), or bromo ketones IV (R3 = CH2Br) which cyclized with o-(H2N)2C6H4 to I and II. In the 2nd method, acetylquinoxalines V were brominated and the products cyclized with thioamides to I. I (R1 = CO2Et, R2 = H, Me) underwent saponification, ammonolysis, aminolysis, and hydrazinolysis to give I (R1 = CO2K, CO2H, CONR4R5; R4 = H, Me, Et, Bu, NH2, R5 = H; R4 = R5 = Me; NR4R5 = morpholino, piperidino).

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Pyridine-3,5-dicarbonitrile(SMILESS: N#CC1=CC(C#N)=CN=C1,cas:1195-58-0) is researched.Category: dioxole. The article 《Oxidative ammonolysis of 3,5-lutidine on vanadium oxide contacts modified by additives of tin and titanium oxides》 in relation to this compound, is published in Izvestiya Akademii Nauk Kazakhskoi SSR, Seriya Khimicheskaya. Let’s take a look at the latest research on this compound (cas:1195-58-0).

Ammoxidation of 3,5-lutidine on the title catalysts at 340-420° gave 5-methylnicotinonitrile (I) and 3,5-pyridinedicarbonitrile (II) in yields as high as 85 and 65%, resp. At the lower temperatures and contact times, II was formed sequentially via I, but under the more drastic conditions II could also be formed directly from 3,5-lutidine.

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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, Australian Journal of Chemistry called The synthesis of 2-(heteroaryl)imidazo[1,2-a]pyridin-3-ols and related compounds, Author is Deady, Leslie W.; Stanborough, Mark S., which mentions a compound: 23002-78-0, SMILESS is CC(C1=CSC(C)=N1)=O, Molecular C6H7NOS, Quality Control of 1-(2-Methylthiazol-4-yl)ethanone.

A reaction between pyridin-2-amine 1-oxides and bromoacetyl heteroaromatic compounds gave the title compounds,e.g., I. The reaction of some 2-aminodiazine 1-oxides with phenacyl bromides was also studied. The imidazo[1,2-a]pyrimidine and imidazo[2,1-a]phthalazine systems were prepared but reaction of pyrazin-2-amine 1-oxide did not give the desired cyclization.

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Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 1195-58-0, is researched, Molecular C7H3N3, about Alkylation of pyridine-3,5-dicarboxamide and pyridine-3,5-dicarbonitriles by radical substitution, the main research direction is alkylation pyridinedicarboxamide pyridinedicarbonitrile; radical substitution pyridinedicarboxamide pyridinedicarbonitrile.Reference of Pyridine-3,5-dicarbonitrile.

Structural modification of NAD(P) model compounds, N,N,N’,N’-tetramethylpyridine-3,5-dicarboxamide (1), pyridine-3,5-dicarbonitrile (2), and 4-methylpyridine-3,5-dicarbonitrile (3), have been explored by the reaction with alkyl radicals such as the 1-adamantyl, tert-Bu, and iso-Pr radicals. The alkyl substitutions of compounds 1, 2, and 3 with the 1-adamantyl and the tert-Bu radical gave both 2-mono and 2,6-disubstitution products, whereas the reaction of compound 2 with the iso-Pr radical gave 2-mono- I, 2,4-di-, 2,6-di-, and 2,4,6-trisubstitution products.

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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: 1-(2-Methylthiazol-4-yl)ethanone, is researched, Molecular C6H7NOS, CAS is 23002-78-0, about Synthesis of 4-acetylthiazole and its 2-carboxylic acid ethyl ester.Reference of 1-(2-Methylthiazol-4-yl)ethanone.

4-Acetylthiazole (I, R = H) was prepared by treating BrCH2COCMe:NOH with P2S5 and HCONH2 to give 30% 4-acetylthiazole oxime which was treated with aqueous CH2O to give 65% I (R = H). I (R = Me, Ph) were also obtained by cleaving their oximes with CH2O. I (R = CO2Et) was prepared by thiolating Et oxamate, treating Et thiooxamate with BrCH2COCMe:NOH and cleaving the oxime with CH2O.

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