SCHEDULED MAINTENANCE
Efficient syntheses and the nucleophilic substitution of dibromoazulenequinones 5a and 5b and tribromoazulenequinones 6a and 6b were carried out: the five-membered ring portion of the molecule is proved to be more reactive than the seven-membered ring.
O. Sato, N. Matsuda, S. Yoshioka, A. Takahashi, Y. Sekiguchi, J. Tsunetsugu and (. late) Tetsuo Nozoe, J. Chem. Res. (S), 1998, 108 DOI: 10.1039/A705020H
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