ABSTRACTThe objective of this research was to identify potential short-term metabolic bottlenecks of propionate metabolism in the liver of dairy cows in the postpartum (PP) period and how such bottlenecks are affected by feeding status. Propionate, produced primarily from the fermentation of sta...

Substitution of alkyl groups on the ortho-position of 3-phenylsydnone causes a steric hindrance in coplanarity of the sydnone and phenyl rings. This was proved from the shift of the polarographic half-wave potentials (in excess of the polar effects), from the ultra-violet spectra, and from scale...

The kinetics of solvolysis of various dialkyl sydnones: 3-tert-butyl-4-methyl, 3-n-propyl-4-ethyl, 3-ethyl-4-methyl, 3-isopropyl-4-ethyl, 3-n-propyl-4-methyl, and 3-n-propyl-4-n-butyl sydnone, have been studied spectrophotometrically as a function of HCl and NaOH concentrations, pH, and temperat...

Bimacrocyclic and acyclic m-terphenylsulfinic acids 5, 7 and 9 have been synthesized. Acidities have been measured in 2-methoxyethanol/water (80:20 w/w) and have been compared to the acidities of analogous benzoic acids. Tetra-ortho-substitution of the outer aryl rings of a m-terphenyl-2′-acid ...

N-doped carbon nanotubes (NCNTs) with different contents of N were prepared by pre-oxidation and subsequent N-doping strategy and employed as the supports to fabricate Cu-based catalysts for oxidative carbonylation of methanol. The supports and their corresponding catalysts were characterized th...

A systematic synthesis and X-ray structural analysis have been made for several manganese derivatives with pyridine-2-methanol as a chelating ligand; neutral Mn(C5NH4-2-CH2OH)2(C6F5CO2)2 (1), trans-[Mn(C5H4N-2-CH2-OH)2{C6F4-1,4-(CO2)2}]∞ (2), cis-[Mn(C5H4N-2-CH2-OH)2{C6F4-1,3-(CO2)2}]∞ (3), {M...

A novel hybrid organic-clay material was prepared by grafting of pyridine-2-methanol in the interlayer space of kaolinite by using a kaolinite/methanol compound as an intermediate. A kaolinite/methanol compound was obtained by guest displacement process of a kaolinite/N-methylformamide pre-inter...

A simple and highly efficient protocol with mild reaction conditions has been developed that allows the smooth protiodecarboxylation of diversely functionalized coumarin-3-carboxylic acids. In the presence of catalytic amounts of Ag2CO3 and acetic acid, even un-activated coumarin-3-carboxylic ac...

A protocol for straightforward and step-economical synthesis of neoflavones from coumarin-3-carboxylic acids is developed. This approach enables controlled protodecarboxylation/regioselective C–H arylation of coumain-3-carboxylic acids in one-pot using a monometallic catalytic system. A wide va...

Ulcerative colitis is a chronically recurrent inflammatory bowel disease of unknown origin. The present work describes design and synthesis of 3-aminofurosalicylic acid 4, azo-conjugates with aniline 2a, 4-ASA 2b or sulphapyridine 2c as well as N-arylsulphonamido 5, chlorosulphonyl 6, aminosulph...

The total synthesis of lithospermic acid has been accomplished employing two CH activation reactions as key steps. Fe-catalyzed Cross-Dehydrogenative-Coupling reaction was used for the rapid construction of benzofuran framework. Pd-catalyzed ester-directed CH olefination allowed the efficient as...

The new heterocyclic ligand 8-(4-chlorophenyl)-3-butyl-3H-imidazo[4′,5′:3,4]benzo [1,2-c]isoxazol-5-amine (5-AIBI) was synthesized from the reduction of 3-butyl-8-(4-chlorophenyl)-5-nitro-3H-imidazo[4′,5′:3,4]benzo[1,2-c]isoxazole in high yield. The coordination ability of the ligand with so...

The effects of several lanthanide(II)(Ln3+)ions(Dy3+,Er3+,Eu3+,Nd3+,Yb3+) on the room-temperature fluorescence spectra of 2-indolecarboxylic acid, 5-indolecarboxylic acid, 5-methoxy-2-indolecarboxylic acid and 3-indoleacetic acid were investigated. It was found that the fluorescence quenching by...

Rac.-p-(tris(2-aminoethyl)amine-2-(nitromethyl)ornithine)cobalt(III) trichloride (2d) was obtained by a simple three-step procedure from ornithine using cobalt template chemistry. p-(Tris(2-aminoethyl)amine-ornithine)cobalt(III) trichloride (2a) was obtained from tris(2-aminoethyl)amine (tren) a...

A novel synthesis of cobalt–iron layered double hydroxide (LDH) with interlayer chlorides was investigated. The method consists in mixing concentrated solutions of hexaamminecobalt(III) trichloride with ferrous chloride at room temperature and in anoxic conditions. Four initial Fe/Co atomic rat...

Wastewater containing heavy metal ions such as lead should be treated for cleanup before discharge to environment. This work reports new nanomaterials of orthohexagonal iron oxide for efficient removal of lead (II), which were doped with cobalt (CoFe2O3) or Nickel (NiFe2O3) ions through a simple...

Four known chiral enantiopure octahedral cobalt(III) trichloride salts with aliphatic hexaamine ligands are converted to new CH2Cl2 soluble tris(tetraarylborate) or 3BArf− salts (BArf = B(3,5-C6H3(CF3)2)4 in biphasic reactions. These include sepulchrate and sarcophagine complexes in which the he...

UV–Vis. spectrophotometric study of the adduct formation of organotin(IV)trichlorides i.e. PhSnCl3 and MeSnCl3 as acceptors with Co(II) tetraaza complexes, such as [Co(ampen)] [N,N′-ethylenebis-(o-amino-α-phenylbenzylideneiminato)cobalt(II)], [Co(campen)] [N,N′-ethylenebis-(5-chloro-o-amino-...

The vapour phase alkylation of 5-methoxy-1-naphthol and 4-methyl-1-naphthol with alcohols in the presence of an iron catalysts (magnetite) that contained Cr-, Si- and K oxides was investigated. At temperatures of 580–655 K alkylderivatives with high yield in ortho-position to the hydroxyl group...

Wastewater containing 1-amino-2-naphthol-4-sulfonic acid (ANS) is mainly derived from the dye production process, causing serious environmental problems. In this work, extraction of ANS from wastewater was carried out using trioctylamine (TOA) under condition of methyl isobutyl ketone (MIBK) as ...