Penta corannulene

Reactions of sy/M-penta(3-butynyl)corannulene 45 (alkyl=3-butynyl) with azides can generate triazole derivatives under the catalysis of Cu complexes. These interesting compounds provide potential applications in bioconjugated chemistry [95] and organic materials, which display liquid-crystalline behavior and organogelation properties [96]. 

The chiral penta-substituted corannulene, 1,3,5,7,9-penta-terfbutylcorannulene (37), which shows anomalous dynamic behavior [116], was reduced with Li and four reduction stages were observed [117]. The behavior of the anti-aromatic dianion and the aromatic tetraanion resemble that of the parent corannulene. In the final stage of the reduction, three distinct tetraanionic species could be detected. Two of the species are sandwich-type dimers, as in the case of corannulene, and are diastereomers, due to the chirality of 37 (RR/SS and meso - RS/SR). The third species was assigned as a tetraanionic monomer, which slowly disappears. 

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