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