Reactions of arenes and heteroarenes with aromatic aldehydes proceeded smoothly in the presence of a catalytic combination of [Ir(COD)Cl]2-SnCl4 to afford the corresponding triarylmethane derivatives (TRAMs) in high yields. This 100% TRAM selective transformation is clean and eliminates the use of acid systems.

The selenodecarboxylation of phenylpropiolic and cinnamic acid derivatives with diorgano diselenide is promoted by iodosobenzene diacetate (PhI(OAc)2, IBDA) in acetonitrile at 30−60 °C, leading to the formation of alkynyl selenides and vinyl selenides in moderate to excellent yields. Similar reactivity is also shown by iodosylbenzene (PhIO, IB). The reaction is also triggered in the solid state. An electrophilic mechanism is proposed for the transformation.

Organic molecules with tunable fluorescence quantum yield are attractive for opto-electronic applications. A fluorophore with tunable fluorescence quantum yield should be a better choice for a variety of applications that...

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