In particular, for example, {HEAD ~ a benzyl or methoxymethyl group} is used as {TAIL ~ the protective group} and a Grignard reagent is used as the organometallic reagent 
is used as
In particular , for example , { HEAD ~ a benzyl or methoxymethyl group } is used as { TAIL ~ the protective group } and a Grignard reagent is used as the organometallic reagent
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH