The compounds are synthesized by reacting a compound of the formula with {TAIL ~ an isocyanate} of {HEAD ~ the formula} under basic conditions in a non reactive, polar organic solvent 
The compounds are synthesized by reacting a compound of the formula with { TAIL ~ an isocyanate } of { HEAD ~ the formula } under basic conditions in a non reactive , polar organic solvent
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH