Debenzylation of propanamide (I) by means of H2 over Pd/C in EtOH/HOAc provides alcohol (II), which is then mesylated with methanesulfonyl chloride (MsCl) and Et3N in CH2Cl2 to yield derivative (III). Finally, coupling of (III) with quinazoline derivative (IV) by means of K2CO3 in DMF affords the desired compound.