The C-unsubstituted fully unsaturated Group 15 (P, As, Sb and Bi) 1-benzoheteroepines 6, dibenzo[b,d]heteroepines 8 and dibenzo[b,f] heteroepines 10 have been prepared from the dibromo compounds 3, 7 and 9 having a 1,6-dibromohexatriene system, and their thermal stabilities have been examined.
S. Yasuike, H. Ohta, S. Shiratori, J. Kurita and T. Tsuchiya, J. Chem. Soc., Chem. Commun., 1993, 1817 DOI: 10.1039/C39930001817
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