There are two errors in Scheme 32 on page 6987. The first is that the substituted phenylmagnesium bromide-lithium chloride complex reagent (left) should be substituted pyridylmagenesium bromide-lithium chloride in the synthesis of GSK 269984B in the middle of Scheme 32. The structure should appear as follows: The second error, in the last row of Scheme 32 is that the structures of the fluoroqui...

Using intra-red spectre,copy, the equilibriull ~xcMnge times have been determined tor a aeri•• of keton••, aromatio aldehyde" and a-keto.sters re8ctin~ with oxYaen 18 enriched water. Theso exchange tilMs have been ev.luated in terma ot ateria and electronic coneideration., and applIed to • ,Uacus.ion of the exohange ti"e. of ohlorophyll. a and b and ohlorophyll derlvativeao Introduction This in...

A series of polymerizable quaternary ammonium compounds were synthesized with the aim of using them as immobilized antibacterial agents in methacrylate dental composites, and their structures were characterized by FT-IR, (1)H-NMR, and (13)C-NMR analysis. Their antibacterial activities against the oral bacterium Streptococcus mutans were evaluated in vitro by a Minimum Inhibitory Concentration t...

Perchlorate, thiocyanate, and iodine excretion in urine and milk of 13 breastfeeding women was investigated and the results were interpreted by a model of parallel/competitive transport of these species bythe sodium iodide symporter. For each species i, we assumed physiological homeostasis, where i(T,in) equals the corresponding total excretion in urine and milk (i(e,u) + i(e,m)). The fraction ...

In the title compound, [ZnI(2)(C(13)H(19)N(3)O)], the Zn(II) ion is five-coordinated in a distorted square-pyramidal geometry, in which the basal plane is defined by three N atoms from the Schiff base ligand and one iodide ion. A second iodide ligand, situated in the apical position, completes the coordination geometry. In the crystal structure, C-H⋯O hydrogen bonds link a pair of mol-ecules ar...