Abstract
Abstract 4,8-Dichloro- and 5,7-dichloro-2,10-dihydroxydicyclohepta[b,d]furan-3,9-diones were synthesized. Although the latter could be obtained by condensation of 4-chloro-p-tropoquinone and its hydroquinone, the former required the hydrolysis of condensate of 3-chloro-p-tropoquinone and 7-chloro-5-hydroxy-2-methoxytropone. This mixed condensation led to several unsymmetrically substituted derivatives in improved yields.
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