sodium hydroxide; tellurium; sodium formaldehyde sulfoxylate in tetrahydrofuran 5 h; Ambient temperature; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

ammonium chloride; potassium iodide; zinc 1) DMF, 50 deg C, 1.5 h, 2) DMF, 0 deg C, 20 min; Yield given. Multistep reaction;

sodium hydroxide; tellurium; sodium formaldehyde sulfoxylate in tetrahydrofuran 5 h; Ambient temperature; Yield given. Yields of byproduct given. Title compound not separated from byproducts;