A process 2 wherein said {HEAD ~ ring closure} is conducted using p toluenesulfonic acid or an ester or {TAIL ~ p toluenesulfonyl halide} with a tertiary amine 
is conducted using
A process 2 wherein said { HEAD ~ ring closure } is conducted using p toluenesulfonic acid or an ester or { TAIL ~ p toluenesulfonyl halide } with a tertiary amine
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH