The high-pressure asymmetric Diels–Alder reactions of d-galacto- (1a) and d-manno-3,4,5,6,7-penta-O-acetyl-1,2-dideoxy-1-nitrohept-1-enitol (1b) with 2,5-dimethylfuran (2) afforded mixtures of cycloadducts, from which the (2S,3R)-3-exo-nitro (3a and 3b), (2R,3S)-3-exo-nitro (4a and 4b), and (2R...

1-(2,5-Dimethylfuran-3-yl)-3-(2,4,5-trimethoxyphenyl)prop-2-en-1-one (DFTP) was prepared by the reaction of 2,4,5-trimethoxybenzaldehyde and 3-acetyl-2,5-dimethyfuran. Various spectroscopic techniques including EI-MS, FT-IR, 1H-NMR, 13C-NMR spectral and elemental analysis were applied to confirm...

The standard (p° = 0.1 MPa) molar enthalpies of formation, in the gaseous state, at T = 298.15 K, for 2,5-dimethyl-3-furancarboxylic acid, 3-acetyl-2,5-dimethylfuran, and 4,5-dimethyl-2-furaldehyde were derived from the values of the standard molar enthalpies of formation, in the condensed phas...

IntroductionMany theories on the pathophysiology of chronic rhinosinusitis with nasal polyposis (CRSwNP) exist. The most effective management of CRSwNP has not been elucidated. Doxycycline, which has anti-inflammatory and anti-bacterial properties, has shown durable effects; however, its efficac...

A natural compound contained in olive oil, 3,4-dihydroxyphenylethanol (DOPE), is also known as an endogenous metabolite of dopamine. The role of DOPE in oxidative stress-induced cell damage was investigated using differentiated PC12 cells. Superoxide (O2−) and H2O2 induced a dose-dependent leaka...

Polyphenols, such as oleacein (3,4-DHPEA-EDA; 3,4-dihydroxyphenylethanol-elenolic acid dialdehyde), are believed to play a role in the prevention of cardiovascular diseases. Due to an increase of neutrophil mediators in acute myocardial infarction the aim of this study was to establish the effec...

Novel N-pyrimidyl amidines of alycyclic acids were obtained in one step from of 4-azidopyrimidines and endocyclic enamines. The reaction mechanism involves [3 + 2]-addition of azide at the double bond followed by cleavage of thus formed 1,2,3-triazoline ring, and a contraction of alicycle.

The pharmacological properties of T-2328 were evaluated as an antagonist of the tachykinin neurokinin 1 (NK1) receptor. T-2328 inhibited the specific binding of [3H][Sar9,Met(O2)11]substance P to tachykinin NK1receptors in human lymphoblastic IM9 cells with Kiof 0.08 nM. In the same assay, Kifor...

Crosslinked poly (ether ether ketone) (PEEK) hydroxide exchange membranes are prepared using bi-functional cyclic ammonium, 1,4-diazabicyclo [2,2,2] octane (DABCO), as simultaneous quaternization and crosslinking reagent. Hydroxide conductivity and ion mobility are evaluated as a function of ion...

Vinylbenzyl ether-terminated oligo(2,6-dimethyl-1,4-phenylene ether) (1) has been commercialized by Mitsubishi Gas Chemical in the name of OPE-2St. OPE (1) is used in high-frequency printed circuit board due to its low-dielectric characteristic after curing. However, for thermoset of (1), there ...

The biosyntheses of alterporriol D and E, metabolites of Alternaria porri were elucidated by incorporation experiments of single and double labelled acetates. 13C NMR assignments were also established.

The production of alterporriols, altersolanols and macrosporin by Alternaria porri and A. solani was examined by means of HPLC. Alterporriol-A, -B and -C were detected from both species, using potato sucrose medium, and from A. porri, using onion decoction medium. They were not detected in eithe...

The spent growth medium and mycelia of Alternaria porri afforded a novel anthraquinone named alterporriol C, whose structure was determined by spectroscopic methods as well as by degradation to known compounds. Alterporriol C was found to be an α,β′-bianthraquinone derived from macrosporin an...

Culture liquid and mycelia of Alternaria porri afforded a novel anthraquinone named alterporriol A, whose structure was determined by spectroscopic methods as well as by degradation to known compounds. Alterporriol A was found to be an atropisomer of alterporriol B previously reported.

A series of 5-substituted thiazolidin-2-ones with various functional groups was synthesized efficiently via a radical addition of xanthates and tert-butyl N-allylcarbamates and subsequent 88% HCO2H-catalyzed cyclization. The mechanism of the acid-catalyzed cyclization was proposed as well.

Recognition of a dicarboxylic acid in solution as well as in the solid phase by the pyridyl urea based pseudoditopic receptor 1 has been studied. The X-ray structures of both the receptor and its complex with 1,4-phenylenediacetic acid are also presented. Intramolecular hydrogen bonding inhibits...

New derivatives of 2-aminomethyl-1,3,4-oxadiazole were synthesized in the reactions of N-protected phenylglycine hydrazides and triethyl orthoesters (orthoformate, orthoacetate, orthopropionate, orthobenzoate) in the presence of glacial acetic acid. Studies on the cleavage reactions of the acid-...

T–lymphokine-activated killer cell–originated protein kinase (TOPK) is a serine-threonine mitogen-activated protein kinase that is highly expressed in many types of human cancer. Due to its important role in cancer progression, TOPK is becoming an attractive target in chemotherapeutic drug des...

Spectrophotometric determinations of palladium(II) and tartaric acid were respectively investigated by using the color reactions between 2(5-nitro-2-pyridylazo)-5-(N-propyl-N-3-sulfopropylamino)phenol(5-NO2.PAPS) and palladium(II) in strong acidic media, and between 5-NO2.PAPS, niobium(V) tartar...

A direct colorimetric method is presented for the determination of serum iron in 0.1-ml sized samples, using a new, water-soluble, reagent, 2-(5-Nitro-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol Na salt (ϵ585nm = 9.4 × 104 l/mol per cm). Interference of copper and zinc in sera can be el...