The reaction time required may depend upon various factors including {TAIL ~ the mole ratio} of compounds and and the nature of {HEAD ~ organic groups} R2 and R3 and may generally be in the range of 5 30 minutes 
The reaction time required may depend upon various factors including { TAIL ~ the mole ratio } of compounds and and the nature of { HEAD ~ organic groups } R2 and R3 and may generally be in the range of 5 30 minutes
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH