Polymer-supported bis p-methoxyphenyl telluroxide

A useful modification of the bis(p-methoxyphenyl) telluroxide reagent is its immobilization on a polymeric resin. This polymer-supported reagent, prepared from p-methoxyphenyl tellurocyanate and polylp-Uthiostyrene), exhibits several advantages over the monomeric reagent, such as easier product work-up and multiple recycle from the spent reagent. 

Compared to the analogous supported selenoxide, the tellurium reagent requires shorter reaction times and milder experimental conditions. 

Prepararion of the polymeric telluridef One per cent divinylbenzene styrene co-polymer Bio-Beads S-X (Bio-Rad laboratories), is converted into poly(p-lithiostyrene) according to the described procedure.  

The spent reagent can be recovered as the reduced species by filtration, and reused after oxidation. The activity is not decreased even after 10 recycles. 

Like its monomeric counterpart, the polymeric reagent is inert to simple amines, amides, alcohols and phenols, but easily oxidizes thiols to disulphides, phosphines to phosphine oxides, hydroquinone and catechol to quinones, and thioketones, thioesters and trithiocar-bonates to the corresponding 0x0 derivatives, in dichloromethane, chloroform or acetic 

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