Also, a salt of a non chiral auxiliary can be used as a cyclizing agent in {HEAD ~ a process} using {TAIL ~ a starting material} containing a chiral auxiliary 
using
Also , a salt of a non chiral auxiliary can be used as a cyclizing agent in { HEAD ~ a process } using { TAIL ~ a starting material } containing a chiral auxiliary
OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH