In the process, {TAIL ~ an alkyl β alkoxy β iminopropionate salt} is reacted first with {HEAD ~ a suitable alkanol} to form an orthoester intermediate in situ 
In the process , { TAIL ~ an alkyl β alkoxy β iminopropionate salt } is reacted first with { HEAD ~ a suitable alkanol } to form an orthoester intermediate in situ
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH