Reaction can rapidly proceed in {HEAD ~ an organic solvent} such as chloroform, {TAIL ~ methylene chloride}, benzene, toluene, etc 
such as
Reaction can rapidly proceed in { HEAD ~ an organic solvent } such as chloroform , { TAIL ~ methylene chloride } , benzene , toluene , etc
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH