Then the orthoester is converted in high yields to the corresponding imidic ester by condensation with an aniline while simultaneously removing {HEAD ~ alkanol} from the reaction mixture to drive {TAIL ~ the equilibrium reaction} to completion 
Then the orthoester is converted in high yields to the corresponding imidic ester by condensation with an aniline while simultaneously removing { HEAD ~ alkanol } from the reaction mixture to drive { TAIL ~ the equilibrium reaction } to completion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH