Described herein are complexes comprising a cationic antibacterial agent and a metal salt; oral care compositions comprising same; along with methods of making and using these complexes and compositions.

By providing a novel polycyclic aromatic compound in which a plurality of aromatic rings are linked via a boron atom, a nitrogen atom, or the like, options of a material for an organic EL element are increased. In addition, by using the novel polycyclic aromatic compound as a material for an organic electroluminescent element, an excellent organic EL element is provided.

Preparation of the compounds of general formula I, among them misoprostol where R represents a straight- or branched-chain C.sub.1-4 alkyl group by cuprate coupling of the vinyl cuprate of general formula II prepared by reacting the vinyl stannane of general formula III with copper halide CuX and alkyllithium R.sup.1Li wherein: R.sup.2 stands for H or an alcohol-protecting group which may contain silicium atom, as for instance trimethylsilyl-, triethylsilyl-, tert.-butyldimethylsilyl- group, or a cyclic or open-chain alkyl group containing oxygen atom, as for instance tetrahydropyranyl-, methoxymethyl- or ethoxymethyl- group; X means I, Br, CN, SCN, OSO.sub.2 CF.sub.3 group, R.sup.1 represents C.sub.1-6 alkyl group, n>2, if R.sup.2 is not hydrogen atom, n>3, if R.sup.2 is hydrogen atom, and the protected enone of the general formula IV 30 22 IV where R.sup.3 represents THP- or trialkylsilyl-group and the meaning of R is as defined above takes part in the cuprate reaction 5 in a manner that a.) the excess of the alkyllithium, which is applied as compared to the Cu(I) iodide in the case of R.sup.2H in 2-2.4 molar ratio, in the case of R.sup.2=H in 3-3.4 molar ratio, is decomposed before the coupling reaction of II and IV, b.) the protecting groups of the resulting compound of the general formula V 15 V where the meanings of R, R.sup.2 and R.sup.3 are as defined above are removed, the obtained compound of the general formula I is purified by chromatography.

##STR00001##

A novel method and system for using certain tin compounds as dopant sources for ion implantation are provided. A suitable tin-containing dopant source material is selected based on certain attributes. Some of these attributes include stability at room temperature; sufficient vapor pressure to be delivered from its source supply to an ion chamber and, the ability to produce a suitable beam current for ion implantation to achieve the required implant Sn dosage.

A method for determining the purity of a sample comprising a monoalkyl tin triamide compound and optionally dialkyl tin diamide, tetraalkyl tin, and tetrakis(dialkylamido)tin compounds using gas chromatography is provided. The total content of dialkyl tin diamide, tetraalkyl tin, and tetrakis(dialkylamido)tin compounds detectable by the method may be less than about 40 ppm.

The present invention provides methods for radiolabeling compounds useful as Hsp90 inhibitors. The present invention also provides intermediates useful in such methods, and compositions of radiolabeled compounds. The present invention provides, among other things novel methods for the synthesis of radiolabeled compounds. In certain embodiments, the present invention provides compounds of formula I.

The present invention relates to a novel photoacid generator compound cation, comprising an element having for 92 eV photons (extreme ultraviolet (EUV)) an absorption cross section of at least 0.510.sup.7.Math.cm.sup.2/mol; having at least two stable oxidation states; and selected from the elements of group 1 to group 15 of the periodic table of the elements. Additionally, the present invention relates to a photoacid generator comprising said photoacid generator compound cation and an anion. Furthermore, the present invention aims to provide a photoresist composition comprising said photoacid generator and an acid labile polymer. Finally, the present invention relates to a method of generating an acid using the photoresist composition and a method of forming a patterned materials feature on a substrate.

A method of producing a mono alkyl tin halide from a poly alkyl tin halide, comprising providing the poly alkyl tin halide, adding a Lewis acid catalyst to the poly alkyl tin halide to create a reaction mixture, heating the reaction mixture, dosing a hydrogen halide into the reaction mixture to convert the poly alkyl tin halide into a raw product containing mono alkyl tin halide.

Prostate-specific membrane antigen (PSMA) binding compounds having radioisotope substituents are described, as well as chemical precursors thereof. Compounds include pyridine containing compounds, compounds having phenylhydrazine structures, and acylated lysine compounds. The compounds allow ready incorporation of radionuclides for single photon emission computed tomography (SPECT) and positron emission tomography (PET) for imaging, for example, prostate cancer cells and angiogenesis.

The present disclosure relates to a composition that includes a perovskite of A.sub.2BX.sub.4, where A includes an R-form of a chiral molecule of at least one of ##STR00001##
and/or an S-form of the chiral molecule, B includes a cation, X includes an anion, R.sub.1 includes a first carbon chain having between 2 and 5 carbon atoms, R.sub.2 includes at least one of a hydrogen atom, a halogen atom, a carboxylic acid group, an alkoxy group, and/or a second carbon chain, and R.sub.3 includes a third carbon chain.