Reaction of o-diethynylbenzene with sodium telluride in the presence of hydrazine hydrate gives 3-benzotellurepine 2, which is converted into the 3,3-dihalogeno derivatives 3 by treatment with sulphuryl chloride or bromine; these compounds are the first examples of tellurepines.
H. Sashida, H. Kurahashi and T. Tsuchiya, J. Chem. Soc., Chem. Commun., 1991, 802 DOI: 10.1039/C39910000802
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