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