Abstract
Nitration of biphenylene with bismuth subnitrate and thionyl chloride give a mixture of 2-nitrobiphenylene, 2-chloro-6-nitrobiphenylene, and 5-chloro-10-nitrobenzocyclooctene. Reactions of 2-nitrobiphenylene and 5-chloro-10-nitrobenzocyclooctene with ethyl isocyanoacetate in the presence of t-BuOK gave the corresponding pyrimidine N-oxide and pyrrole, respectively.
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