Abstract
The octaethyl triptycenes 7 and 8 were synthesized by Diels - Alder reaction of the octaethylanthracene 4 with the corresponding benzynes. Low-temperature NMR spectra of 7 and 8 are consistent with the presence of the fully alternated conformation "a" of C2 symmetry. However, in the determined crystal structures, the compounds adopt a higher energy conformation with a pair of vicinal ethyls oriented in the same direction.
Original language | English |
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Pages (from-to) | 7898-7901 |
Number of pages | 4 |
Journal | Journal of Organic Chemistry |
Volume | 67 |
Issue number | 22 |
DOIs | |
State | Published - 1 Nov 2002 |