{HEAD ~ The coupling reaction} is conducted in an inert solvent, {TAIL ~ e.g. dichloromethane}, acetonitrile or dimethylformamide 
{ HEAD ~ The coupling reaction } is conducted in an inert solvent , { TAIL ~ e.g. dichloromethane } , acetonitrile or dimethylformamide
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH