Abstract
A sequence involving bromination of dimethyl 1,3-cyclo-heptadiene-2,3-dicarboxylate (2) and subsequent double dehydrobromination provided an improved synthetic method for preparing dimethyl cyclohepta-1,3,5-triene-3,4-dicarboxylate (1). The mechanism for the dehydrobromination step is also discussed.
ACKNOWLEDGMENT
This work was supported by a Grant-in-Aid for Scientific Research (No. 10640513) from the Ministry of Education, Science, Sports, and Culture, Japan.