These methods include converting {TAIL ~ the acid} to an activated acid and reacting with one or more molar equivalents of {HEAD ~ the desired amine} 
These methods include converting { TAIL ~ the acid } to an activated acid and reacting with one or more molar equivalents of { HEAD ~ the desired amine }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD