The asymmetric unit of the anhydrous title compound, 2Na(+)·C(4)H(4)O(6) (2-), contains two sodium cations and one tartrate anion. Each sodium ion is six coordinate, with bonding to six O atoms from both the carboxyl-ate and hydroxyl groups of the anion. A three-dimensional coordination network is formed with sodium ions stacking in layers along the c-axis direction. This network is supported b...

Chiral phosphite-urea bifunctional catalysts have been developed for the enantioselective bromocyclization of 2-geranylphenols with N-bromophthalimide (NBP) for the first time. The chiral triaryl phosphite moiety activates NBP to generate a bromophosphonium ion. On the other hand, the urea moiety interacts with a hydroxyl group of the substrate through hydrogen bonding interactions. Enantiosele...

The oxindole-3-acetic acids, oxidative metabolites of indole-3-acetic acid, were isolated from a byproduct of a corn starch manufacturing plant, and were further converted to the 3-hydroxyl derivatives in the presence of metal ion. The mechanical study was followed by a chemical analysis including other byproducts, and suggested the presence of an intermediate that had a radical at the C-3 posi...

In the title compound, [NdCl(3)(C(12)H(10)N(2)O)(3)], the central Nd(III) ion is nine-coordinated by six N atoms from three bidentate chelate N-[phen-yl(pyridin-2-yl)methyl-idene]hydroxyl-amine ligands and three Cl(-) ions, and displays a distorted tricapped trigonal prismatic geometry. The complex mol-ecules are stabilized by intra-molecular O-H⋯Cl hydrogen bonds.

Fora number of cytotoxic and tumorigenic agents, active oxygen species such as hydroxyl radical are postulated to be responsible for indirect DNA darnage (Cerutti 1981). Besides the formation of strand breaks, hydroxylation of DNA bases is assumed to occur, as sha.wn earlier with ionizing radiation. It was the aim of this work to determine in vitro the DNA-damaging potency of hydrogen peroxide ...

While the reaction of carbaboranyl carboxylic acids and ketones with organolithium reagents generally leads to cleavage of the exo-polyhedral C-C bond, introduction of a hydroxyl group at the second carbon atom of the cluster enables the reduction of the carbonyl compounds to tertiary alcohols. The proposed mechanism involving the formation of dimeric contact ion pairs was supported by X-ray cr...

New benzodiazaphosphorin-2-oxide derivatives 3 were synthesized with the aim of evaluating in vitro their antioxidant properties related to DPPH radical scavenging, ferric reducing power (FRP), hydroxyl radical scavenging and ferrous ion chelating activity (FIC). The structures of the new compounds were confirmed and characterized on the basis of their infrared and nuclear magnetic resonance sp...

Volicitin [N-(17-hydroxylinolenoyl)-L-glutamine] has previously been identified from the lepidopteran larval regurgitant as an elicitor of plant volatile emission. The efficient incorporation of free oxygen into volicitin by Spodoptera litura larvae is demonstrated here by rearing them under (18)O(2) for three days. (18)O-labeling of the hydroxyl group of volicitin was confirmed by liquid chrom...