Interfacial processes occurring at polycrystalline gold in acidic 1-ethyl-3-methylimidazolium chloroaluminate melts at room temperature, at potentials more positive than aluminum bulk deposition, include both Al underpotential deposition and the formation of Al/Au alloys. This information complements that reported in the literature for Al electrodeposition on Au in AlCl 3 /NaCl melts at temperatures of 200ЊC and higher. Cyclic voltammetry and chronopotentiometry suggest that at least two alloys form, and there is fast phase transformation between these intermetallic compounds at room temperature in the aluminum underpotential region. This transformation with thin gold films was slower than that in bulk gold electrodes.

A concise approach to the synthesis of functionalized opp-dibenzoporphyrins is described. In this method, introduction of alkenyl groups to the porphyrin periphery through the vicinal 2-fold Heck reaction, 6-pi electrocyclization, and subsequent aromatization occur in one pot.

In this paper, the development of a chiral phosphine-catalyzed formal [2 + 2] cycloaddition of aldehydes and ketoketenes that provides access to a variety of highly substituted beta-lactones (14 examples) is reported. The BINAPHANE catalytic system displays excellent enantioselectivity (seven examples with ee >or=90%) and high diastereoselectivity favoring formation of the trans-diastereomer (nine examples with dr >or=90:10).