Additions of organodilithium reagents to dialdehydes allow for construction of [1.1.1.1]metacyclophane macrocycle in similar to 40% yield in the ring forming step, without resort to standard high dilution techniques. The present methodology is complementary to the conventional condensations leading to phenol- and resorcinol-based cyclotetramers.
An efficient method for the highly regio‐ and stereoselective synthesis of 1,2,3‐trisubstituted indanes from diarylmethanols and allylamides through iron(III) chloride hexahydrate‐catalyzed intermolecular [3+2] cycloaddition reaction is reported. A range of 1,2,3‐trisubstituted indanes were prepared in good to excellent yields with excellent stereoselectivities for various combinations of diarylmethanols
The present invention relates to the compounds of the formula (1) and to organic electronic devices in which these compounds are used as matrix material in the emitting layer and/or as hole-transport material and/or as electron-blocking or exciton-blocking material and/or as electron-transport material.