Careful attention must be paid to step wherein {TAIL ~ the trimethylsilylating agent} is added to {HEAD ~ the molten alcohol}, catalyzed with the organic superacid, to avoid an uncontrollable reaction 
Careful attention must be paid to step wherein { TAIL ~ the trimethylsilylating agent } is added to { HEAD ~ the molten alcohol } , catalyzed with the organic superacid , to avoid an uncontrollable reaction
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH