2009

2 alkyl cyanoacrylates are acrylic monomers of high use as industrial and domestic adhesives (crazy glue), or as surgical adhesives. In the literature it has been described the interaction among these monomers and peptidic compounds, but it has not been identified the chemical structure at the interface. Another group of authors detected kinetic incompatibilities with the anionic polymerization mechanism. In the present work, it was possible to identify a product as a result of the acid hydrolysis of the monomer.

The results of studies of the effect of synthesized modifiers based on cyanosorbic acid on the ther- mal properties of cyanoacrylate adhesives have been presented.

A monomer composition comprising at least one polymerizable alkyl ester α-cyanoacrylate monomer.

An effective protocol has been developed that allows the smooth protodecarboxylation of diversely functionalized aromatic carboxylic acids within 5−15 min. In the presence of at most 5 mol % of an inexpensive catalyst generated in situ from copper(I) oxide and 1,10-phenanthroline, even nonactivated benzoates were converted in high yields and with great preparative ease.

Reaction of 3-substituted isocoumarins (la-h) with excess of sodium borohydride in methanol gave the corresponding 2-(2-(hydroxymethyl)phenyl)ethanol derivatives (2a-h). Antimicrobial activities of synthesized compounds were measured, using Gram-negative (Escherichia coli, Salmonella typhi, Proteus mirabilis) and Gram-positive bacteria (Bacillus cereus, Staphylococcus aureus).

The use of “purified” cooling agents in pharmaceutical and cosmetic preparations only dates back to the late 1880s with the commercial production of menthol from Japanese peppermint (Mentha arvensis) oil in Japan (1). The cultivation of peppermint in Japan before the Christian era appears to predate any other country, and menthol is reputed to have been used medicinally for almost as long (2). In the Western world, it was about 1770 that the Dutch botanist, H. David Gaubius, first isolated menthol from the oil of Mentha piperita in Utrecht (2,3).

A method and kit for providing a tack-free artificial nail surface. The tack-free artificial nail surface may include an acrylic layer and a barrier layer. The acrylic layer may comprise an odorless monomer. The barrier layer may be of any material impervious to oxygen. The tack-free nail surface may be formed by application of the acrylic layer to a fingernail nail bed. The barrier layer may then be applied over the acrylic layer. The barrier layer blocks oxygen from the acrylic layer so that the acrylic layer may polymerize in the absence of oxygen.

Zirconocene is the key: A new synthetic method, which utilizes zirconocene-mediated coupling of alkynes, has been developed for the preparation of a new class of highly Lewis acidic boroles (see scheme). Such compounds hold potential for applications in catalysis and the field of electron-deficient organic materials.

Perfluorination: The fully fluorinated analogue of pentaphenylborole (see structure; B gray, C black, F green) has been prepared using successive transmetallation reactions involving Zr and Sn heterocycles. The highly moisture-sensitive borole is a new member of the perfluoroaryl borane family, a class of antiaromatic compounds of fundamental significance to concepts of aromaticity.

Dissolution with suitable solvents is one of the cheapest and more efficient processes for polystyrene waste management. In this work the solubility of polystyrene foams in several solvents benzene, toluene, xylene, tetrahydrofuran, chloroform, 1,3-butanediol, 2-butanol, linalool, geraniol, d-limonene, p-cymene, terpinene, phellandrene, terpineol, menthol, eucalyptol, cinnamaldheyde, nitrobenzene, N,N-dimethyl- formamide and water has been determined.