Category: alcohols-buliding-blocks

Quality Control of Dichloro(1,5-cyclooctadiene)platinum(II). 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: Dichloro(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12Cl2Pt, CAS is 12080-32-9, about Phosphorylation of 1,4:3,6-Dianhydro-D-sorbitol. Author is Anfilov, K. L.; Kurochkina, G. I.; Bratash, G. S.; Grachev, M. K..

Regioselective mono- and diphosphorylation of 1,4:3,6-dianhydro-D-sorbitol containing two hydroxyl groups differing in steric availability has been studied. The nature of the amine acting as activator and acceptor of hydrogen chloride have had significant impact on the direction of phosphorylation and the structure of the resulting products.

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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 Classics Meet Classics: Theoretical and Experimental Studies of Halogen Bonding in Adducts of Platinum(II) 1,5-Cyclooctadiene Halide Complexes with Diiodine, Iodoform, and 1,4-Diiodotetrafluorobenzene, published in 2021-02-03, which mentions a compound: 12080-32-9, mainly applied to halogen bonding platinum cyclooctadiene halide complex diiodine iodoform diiodotetrafluorobenzene; safety cyclooctadiene health hazard, Safety of Dichloro(1,5-cyclooctadiene)platinum(II).

Complexes of PtX2COD (X = Cl, Br, I; COD = 1,5-cyclooctadiene) were cocrystd. with classical halogen-bond donors (CHI3, I2, and 1,4-diiodotetrafluorobenzene (FIB)), resulting in noncovalently bound supramol. aggregates of various lengths-from heterotrimers to polymers. The influence of halides in the complexes on the geometry and strength of the halogen bond (XB) was studied both exptl. by single-crystal XRD and theor. by quantum chem. methods such as noncovalent interaction plots (NCI-plot), electrostatic potential (ESP) surface anal., and a combination of electron localization function (ELF) and quantum theory of atoms in mols. (QTAIM) analyses. It was shown that strength of XB interactions in the adducts increases in the order CHI3 > FIB > I2. Although halogen bonding was found to be the main preorganizing force in the structures, in the case of FIB adducts a rare Pt···I interaction was involved in addnl. stabilization of the structure. Hence, fine-tuning of halogen bonding can influence the length of the polymer, as well as the strength and directionality of interactions in the adduct. Since Hassel’s already classical work on charge-transfer interactions, halogen bonding has attracted a great deal of attention as a potentially useful instrument to organize mols. Due to the tunability, relative strength, and directionality, halogen bonding has been used as a self-assembly tool in crystal engineering. In this study classics meet classics: classical halogen bond donors XBD (such as mol. iodine, iodoform, and FIB) and classical synthons PtX2COD were used to create metallopolymeric adducts. In the obtained systems the XBD influenced the geometry (1D or 2D) and the length (heterotrimer or polymer) of the adduct. To understand differences among the obtained systems, they were further studied with computational methods, and addnl. stabilizing weak interactions were discovered. Caution: COD is hazardous to health and should be handled with care.

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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.Product Details of 2208-59-5. The article 《Lactams. VIII. Conformation of N-aryl lactams》 in relation to this compound, is published in Tetrahedron. Let’s take a look at the latest research on this compound (cas:7661-33-8).

N-Aryl β-lactams were characterized by strong uv maximum at about 250 mμ. Some N-aryl γ-lactams also show similar absorption maximum but heavily substituted γ-lactams or N-phenyl δ-lactam display only low absorption in this region. A study of uv and N.M.R. spectra indicates that in N-aryl β-lactams, the heterocyclic ring and the three valences of N are planar and the N-aryl ring lies in the plane of the β-lactam. This planarity as well as the strong uv absorption are the result of an extended conjugation between the aryl ring and the amide function. Ortho substitution on the aryl ring causes a slight departure from this planarity and reduces the intensity of the uv absorption. In case of N-aryl γ-lactams, ortho substitution on the aryl ring causes enough departure from planarity to eliminate altogether the absorption maximum near 250 mμ. 22 references.

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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: 651780-02-8, is researched, Molecular C12H13BrN2O2, about Indazoles: Regioselective Protection and Subsequent Amine Coupling Reactions, the main research direction is indazole regioselective protection Buchwald amine coupling.Application of 651780-02-8.

Indazoles are unselectively protected under strongly basic conditions to give a mixture at positions N-1 and N-2. Under mildly acidic conditions, regioselective protection at N-2 takes place. Thermodn. conditions lead to regioselective protection at N-1. This trend applies to various substituted indazoles. Protected 5-bromoindazoles participate in Buchwald reactions with a range of amines to generate novel derivatives

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Formula: C10H10ClNO. 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 Amidation of Aryl Chlorides Using a Microwave-Assisted, Copper-Catalyzed Concurrent Tandem Catalytic Methodology. Author is Chang, Raymond K.; Clairmont, Brice P.; Lin, Shirley; MacArthur, Amy H. Roy.

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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Puttock, Emma V.; Sturala, Jiri; Kistemaker, Jos C. M.; Williams, J. A. Gareth published an article about the compound: Dichloro(1,5-cyclooctadiene)platinum(II)( cas:12080-32-9,SMILESS:C1=CCC/C=CCC/1.[Pt+2].[Cl-].[Cl-] ).Reference of Dichloro(1,5-cyclooctadiene)platinum(II). 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:12080-32-9) through the article.

Five Pt(II) complexes are described in which the metal ion is bound to anionic N N N-coordinating ligands. The central, deprotonated N atom is derived from an imide Ar-C(:O)-NH-C(:O)-Ar {PtL1-2Cl; Ar = pyridine or pyrimidine}, an amide py-C(:O)-NH-CH2-py {PtL3Cl}, or a hydrazide py-C(:O)-NH-N:CH-py {PtL4Cl}. The imide complexes PtL1-2Cl show no significant emission in solution but are modestly bright green/yellow phosphors in the solid state. PtL3Cl is weakly phosphorescent. PtL4Cl is formed as a mixture of isomers, bound through either the amido or imino nitrogen, the latter converting to the former upon absorption of light. Remarkably, the imino form displays fluorescence in solution, λ0,0=535 nm, whereas the amido shows phosphorescence, λ0,0=624 nm, τ=440 ns. It is highly unusual for two isomeric compounds to display emission from states of different spin multiplicity. The amido-bound PtL4Cl can act as a bidentate O N-coordinating ligand, demonstrated by the formation of bimetallic complexes with iridium(III) or ruthenium(II).

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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 Oxidation of organic compounds. XCIV. Synthesis of 3,5-dicyanopyridine by the oxidative ammonolysis of 3,5-butidine, published in 1973, which mentions a compound: 1195-58-0, mainly applied to lutidine ammoxidation; pyridinedicarbonitrile, Product Details of 1195-58-0.

Ammoxidation of 3,5-lutidine (I) using 1:9:17 I-O-NH3 at 350° in the presence of fused vanadium oxide-titanium oxide with a 0.5 sec contact time gave 40% 3,5-pyridinedicarbonitrile (II) and 5-methyl-3-pyridinecarbonitrile. Hydrolysis of II in aqueous NaOH gave 3,5-pyridinedicarboxylic acid.

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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 Rhodium(III)-Catalyzed C-H Vinylation of Arenes: Access to Functionalized Styrenes, the main research direction is vinyltriethoxysilane arene rhodium catalyst regioselective oxidative vinylation green chem; vinylarene preparation; acetanilide vinyltriethoxysilane rhodium catalyst regioselective oxidative vinylation palladium heterocyclization; acylindole preparation green chem.Formula: C10H10ClNO.

An effective method were developed for Rh(III)-catalyzed direct vinylation of arenes to give functionalized styrenes, using vinyltriethoxysilane as a convenient and inexpensive vinyl source. A wide variety of substrates, including 1-aryl-2-pyrrolidinones, anilines, benzamides and ketones were compatible with this reaction. Moreover, this method can be applied to the two-step synthesis of functionalized indoles. Mechanistic investigation reveals that the reaction probably proceeds through an oxidative Heck/desilylation pathway.

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Related Products of 7661-33-8. 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 Scope and selectivity in palladium-catalyzed directed C-H bond halogenation reactions. Author is Kalyani, Dipannita; Dick, Allison R.; Anani, Waseem Q.; Sanford, Melanie S..

Palladium-catalyzed ligand directed C-H activation/halogenation reactions have been extensively explored. Both the nature of the directing group and the substitution pattern on the arene ring of the substrate lead to different reactivity profiles, and often different and complementary products, in the presence and absence of the catalyst.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Dihydropyridines. V. Formation of the isomeric 1,2- and 1,4-dihydro derivatives in the reaction of methylmagnesinm iodide with 3,5-dicyanopyridine and 3,5-dicyano-2-methylpyridine》. Authors are Kuthan, J.; Janeckova, E.; Havel, M..The article about the compound:Pyridine-3,5-dicarbonitrilecas:1195-58-0,SMILESS:N#CC1=CC(C#N)=CN=C1).Electric Literature of C7H3N3. Through the article, more information about this compound (cas:1195-58-0) is conveyed.

cf. CA 58, 5626a. MeMgI adds to 3,5-dicyanopyridine (I) to give 3,5-dicyano-2-methyl-1,2-dihydropyridine (II) and 3,5-dicyano-4-methyl-1,4-dihydropyridine (III). Similarly, 3,5-dicyano-2-methylpyridine (IV) forms 3,5-dicyano-2,6-dimethyl-1,2-dihydropyridine (V) and 3,5-dicyano-2,4-dimethyl-1,4-dihydropyridine (VI), resp. Nicotinoyl chloride-HCl (from 500 g. nicotinoic acid and 1400 ml. SOCl2) refluxed 35 hrs. with 500 ml. Br, the mixture evaporated on a steam bath, the residue dissolved in 1 l. absolute EtOH, and the solution heated 30 min. on a steam bath gave 81% HBr salt of Et 5-bromonicotinate, m. 147-7.5° (EtOH), from which 80% Et 5-bromonicotinate (VII), b0.5 86-92°, m. 42°, was obtained by treatment with Na2CO3. VII (50 g.) stirred with 30 g. CuCN in 50 ml. HCONMe2 2 hrs. at 160-75°, the mixt evaporated in vacuo, and the residue shaken with 500 ml. concentrated NH4OH and extracted successively with 800 ml. C6H6 and 200 ml. Et2O gave after evaporation 45% Et 5-cyanonicotinate (VIII), b16 143-5°, m. 89-90° (petr. ether). VIII (50 g.) in 1 l. absolute EtOH saturated with NH3 kept 7 days at room temperature gave 72% 5-cyanonicotinamide (IX), m. 220-1° (H2O, EtOH). A mixture of 14 g. IX and 40 ml. anhydrous C5H5N treated over 15 min. with 9 ml. POCl3, stirred 8 hrs., decomposed with ice, alkalized with NH4OH, and extracted with CHCl3 gave 64% I, m. 113-13.5° (dilute EtOH), sublimed 80-90°/10 mm. K salt of 2-hydroxy-3,5-dicyano-6-methylpyridine (6.07 g.) and 7 g. PCl5 treated with 10 ml. POCl3, and the mixture refluxed 30 min., evaporated in vacuo, decomposed with ice, and extracted with C6H6 gave 35% 3,5-dicyano-2-chloro-6-methylpyridine, m. 143-3.5°, which gave IV, m. 76-7°, on catalytic hydrogenation. Reaction of 1.04 g. I in 70 ml. Et2O with MeMgI (from 0.8 g. Mg, 2 ml. MeI, and 30 ml. Et2O) followed by chromatography on Al2O3 (activity II) gave 512 mg. yellow II, m. 114-15° (C6H6, dilute EtOH), and 240 mg. yellowish III, m. 180.5-81° (dilute EtOH). Similarly, 670 mg. IV with MeMgI (from 0.72 g. Mg, 1.9 ml. MeI, and 25 ml. Et2O) afforded 405 mg. yellow V, m. 152-3° (dilute MeOH), and 138 mg. yellowish VI, m. 129.5-30.5°. Dehydrogenation of II, III, V, and VI by heating with equal amounts 30% Pd-C 20 min. at 200-5° gave IV, 3,5-dicyano-4-methylpyridine, m. 84.5-85°, 3,5-dicyano-2,6-dimethylpyridine, m. 118-18.5°, and 3,5-dicyano-2,4-dimethylpyridine, m. 115-15.5°, resp. Ultraviolet and infrared data for II, III, V, and VI, and of some of the intermediates, are given.

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