The reaction of a compound of {HEAD ~ formula IV} with {TAIL ~ a compound} of formula V in accordance with process variant can be carried out in a manner known per se 
with
The reaction of a compound of { HEAD ~ formula IV } with { TAIL ~ a compound } of formula V in accordance with process variant can be carried out in a manner known per se
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH