It is preferred to have the organic base in liquid form during {HEAD ~ the reaction} of {TAIL ~ the present invention} 
of
It is preferred to have the organic base in liquid form during { HEAD ~ the reaction } of { TAIL ~ the present invention }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL