A new cyclic telluride. Synthesis and reactions of 1,3,5,6,7,8‐hexahydronaphtho[2,3‐c]tellurophene

Reaction of 6,7‐bis(chloromethyl)‐1,2,3,4‐tetrahydronaphthalene with tellurium powder and potassium iodide in 2‐butoxyethanol gave 2,2‐diiodo‐1,3,5,6,7,8‐hexahydro‐naphtho[2,3‐c]tellurophene(1) as a red‐orange solid in 40% yield. Reduction of 1 with hydrazine hydrate gave a pale yellow solid of 1,3,5,6,7,8‐hexahydronaphtho[2,3‐c]telluro‐phene(2) in 80% yield. Chlorination, bromination of 2 and its reaction with benzyl bromide and N‐bromosuccinimide were reported. 2,2‐Bis(dimethyldithiocarbamato)‐, 2,2‐bis (diethyldithiocarbamato)‐ and 2,2‐bis(piperidine‐1‐carbodithioate)‐1,3,5,6,7,8‐hexahydro‐naphtho[2,3‐c]tellurophene were prepared by the reaction of the corresponding sodium dithiocarbamate salt with 1. Mononuclear platinum complex (ie, [(C12H14Te)2PtCl2]) was obtained by the reaction of 2 with K2PtCl4. Reaction of 6,7‐bis(chloromethyl)‐1,2,3,4‐tetrahydronaphthalene with KTeCN in DMSO solution gave 2,2‐dihydroxo‐1,3,5,6,7,8‐hexahydronaphtho[2,3‐c]tellurophene (11) as a white solid in 55% yield. All these new compounds were characterized by elemental analysis, IR, 1H, and 13C NMR, and mass spectroscopic data.