Chen Chao, Xi Chanjuan, Liu Yuanyuan, Hong Xiaoyin
Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China.
J Org Chem. 2006 Jul 7;71(14):5373-6. doi: 10.1021/jo060334s.
Zirconaindene derivatives produced benzocyclobutadiene derivatives in situ in the presence of CuCl and 1,4-naphthoquinone, which afforded their dimers, 6a,10b-dihydrobenzo[a]biphenylenes and dibenzosemibullvalenes or dibenzo[a,e]cycloctenes.
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