Acetoxytellurium tribromides

The acetoxytellurium tribromides are converted into the diacetates by the same treatment employed for the diacetoxylation reaction (HOAc, 120°C). The formation of an overall syn- or anft-addnct depends on the competition between a rearward attack by the acetate ion at the tellnrinm atom (as in the case of cyclohexene and 2-butenes), and a front attack by the neighbonring acetate moiety (as in cyclopentenes, where the almost the planarity of the five-membered ring makes the conformation of the acetoxytellnrinm tribromide susceptible to frontal attack). 

---

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

---