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