The temperature and pressure are not critical, but the reaction is preferably carried out at {HEAD ~ reflux temperature} and {TAIL ~ atmospheric pressure} 
The temperature and pressure are not critical , but the reaction is preferably carried out at { HEAD ~ reflux temperature } and { TAIL ~ atmospheric pressure }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL