A new class of organic nonlinear optical crystalline material, cis-2,6-diphenyl-3-isopropylpiperidine-4-one (3IPO), was prepared. The single crystals of the title material with good optical quality have been grown from its benzene solution by slow evaporation solution growth technique at ambient...

We present an improved extraction and derivatization protocol for GC–MS analysis of amino/non-amino acids in Saccharomyces cerevisiae. Yeast cells were extracted with chloroform: aqueous-methanol (1:1, v/v) and the resulting non-polar and polar extracts combined and dried for derivatization. Po...

Cornstalk was depolymerized in supercritical methanol and ethanol, respectively. The depolymerization products were analyzed with FTIR and GC/MS. The results show that the products can be classified into methyl esters and dimethyl diesters, ethyl esters and diethyl phthalate, hydroxybenzenes and...

A novel dehydrodimerization of malonates with indoles has been developed, providing simple and rapid access to 3-indolyl tetramethyl 1,1,2,2-ethanetetracarboxylates. Pd(OAc)2-catalyzed ‘one pot’ C(sp2)–C(sp3) and C(sp3)–C(sp3) cross-dehydrogenative-couplings of malonates with a variety of 2-...

In the presence of catalytic amounts of RhH(PPh3)4 and 1,2-bis(diphenylphosphino)ethane (dppe), 1-nitroalkanes reacted with a diaryl disulfide giving 1-arylthio-1-nitroalkanes in air. The equilibrium to form thermodynamically disfavored products was shifted by the rhodium-catalyzed oxidation of ...

Hydrothermal reaction of divalent metal nitrates with 2-carboxycinnamic acid (H2cca) and 3-pyridylisonicotinamide (3-pina) caused in situ rearrangement of the acid precursor to the anionic lactone 1,3-dihydro-3-oxo-1-isobenzofuranacetate (dibf). This resulted in generation of a series of coordin...

In this study, we focus on isolation and fractionation strategies by solid phase extraction (SPE) for a broad range of environmentally related organic acids. These emerging potential contaminants are primary degradation products of spilled petrogenic compounds but little attention has been given...

A novel lead(II) coordination polymer [Pb(4-cca)]n (1) was prepared by the hydrothermal reaction of Pb(NO3)2 with 4-carboxycinnamic acid (4-H2cca) and structurally characterized. Single-crystal X-ray diffraction revealed that 1 has a 3D supramolecular architecture constructed by 2D [Pb(COO)2]n l...

Unsaturated homopolyamide was prepared from 3-aminocinnamic acid (ACA) by the phosphorylation polycondensation method. In addition, various copolyamides were prepared from ACA and 4-aminobenzoic acid. Furthermore, an Unsaturated homopolyamide was synthesized from 4-carboxycinnamic acid and 4,4′...

Hydrothermal reaction of cobalt nitrate, 2-carboxycinnamic acid (H2cca), and a long-spanning dipyridyl-type ligand resulted in three coordination polymers that were characterized by single crystal X-ray diffraction and manifested different structural topologies and interpenetration schemes. {[Co...

Two new microporous metal-organic framework materials constructed from Zr(IV) (1) or Ce(IV) (2) ions and 4-carboxycinnamate (CCA) ligand are presented. 1 was prepared by heating a mixture of ZrCl4, H2CCA ligand and acetic acid with a molar ratio of 1:1:10 in N,N′-dimethylformamide (DMF) at 150 ...

Concise syntheses of novel chiral pyrroloazacyclo and chiral tricyclic isoquinoline alkaloids, starting from the readily available (S)-1,2,3,4-tetrahydroisoquinoline carboxylic acid methyl ester, by utilizing cascade spiro-to fused and RCM protocols, are reported.

An alternative method to determine the sn-2 monopalmitin in infant formulas was developed and validated. This method offers many advantages over the traditional methods. It follows the official method in the first steps, purification of the fat or oil through an alumina column, and subsequently ...

The infrared spectra of 1-monopalmitin- or 1-monostearin-water systems in the gel phase were observed at room temperature. In both systems the infrared intensities of the bands parallel and perpendicular to the paraffin chain are relatively reduced and enhanced, respectively, on going from the c...

The influence of varietal differences among wheat (Triticum aestivum L.) starches on properties of starch pastes and gels was studied. Wheat varieties with elevated total amylose content within a narrow range (36–43%) displayed widely differing pasting properties in a Rapid Visco Analyser (RVA)...

A multi-methodological approach (differential scanning calorimetry (DSC), X-ray diffraction (XRD) and polarized light microscopy (PLM)) was used to study the influence of monopalmitin (MP) on the isothermal crystallization process of palm oil (PO). MP was added in different concentrations up to ...

An active SBA-15 supported sulfated zirconia catalyst was synthesized by urea hydrolysis method and characterized using N2 adsorption–desorption, SEM, TEM and EDX analyses. The catalyst was used in glycerol esterification with palmitic acid under continuous nitrogen flow and the performance was...

A short and efficient total synthesis of racemic AT-125 and its racemic threo isomer proceeds via an intramolecular Michael cyclization of a protected α,β-dehydroglutamic acid γ-hydroxamate. Separation of diastereomers and deprotection to racemic AT-125 followed by enzymatic resolution of the...

The preclinical pharmacology, antitumor activity and toxicity of seven of the more important amino acid analogs, with antineoplastic activity, is discussed in this review. Three of these compounds are antagonists of l-glutamine: acivicin, DON and azaserine; and two are analogs of l-aspartic acid...

This review summarizes studies designed to label and characterize mammalian synaptic receptors for glutamate, aspartate and related acidic amino acids using in vitro ligand binding techniques. The binding properties of the 3 major ligands employed — l-[3H]glutamate, l-[3H] aspartate and [3H]kai...