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