The process 1, wherein the first stage is undertaken with equimolar quantities of potassium xanthate and {HEAD ~ the sodium salt} of {TAIL ~ 2 bromopropionic acid} 
of
The process 1 , wherein the first stage is undertaken with equimolar quantities of potassium xanthate and { HEAD ~ the sodium salt } of { TAIL ~ 2 bromopropionic acid }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL