{HEAD ~ The reaction} between carboxylic acid salts and {TAIL ~ halogenated derivatives}, especially allylics or benzylics is well known as a manner of obtaining, generally with good efficiency, esters of said acids 
{ HEAD ~ The reaction } between carboxylic acid salts and { TAIL ~ halogenated derivatives } , especially allylics or benzylics is well known as a manner of obtaining , generally with good efficiency , esters of said acids
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH