No abstract

Three-component reactions of alkylglyoxals, 1,3-dicarbonyl compounds, and a nucleophile were performed under aqueous and catalyst-free conditions, which produced 1,4-diketone scaffolds in a straightforward way.

Transition metal and lanthanide monoporphyrinate complexes based on 5,10,15,20-tetrakis[p-(diphenylamino)phenyl]-21H,23H-porphine (H 2 tdpapp) have been synthesized and characterized and the X-ray crystal structures of the palladium and platinum analogues [M(tdpapp)] (M = Pd, Pt) determined. Experimental investigations of the nonlinear optical transmittance characteristics at 532 nm show that most of these new metalated porphyrinate complexes are excellent optical limiters with performances comparable or superior to those of the benchmark reverse saturable absorption dyes such as fullerene C 60 and (phthalocyanine)metal