The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《A novel cyclodehydration. Thermal conversion of diethyl 2-naphthyloxyoxalacetate to diethyl naphtho[2,1-b]furan-1,2-dicarboxylate》. Authors are Takemura, K. H..The article about the compound:1-(Furan-2-yl)propan-1-onecas:3194-15-8,SMILESS:O=C(C1=CC=CO1)CC).Formula: C7H8O2. Through the article, more information about this compound (cas:3194-15-8) is conveyed.
Diethyl 2-naphthyloxyoxalacetate, when heated at 205° did not undergo the expected decarbonylation to give diethyl 2-naphthyloxymal-onate, but instead cyclized to yield diethyl naphtho[2,1-b]furan-1,2-dicarboxylate. The same cyclization was effected in AcOH-H2SO4 and with p-MeC6H4SO3H in toluene. Diethyl 2-naphthyl-oxymalonate was prepared from sodium 2-naphthoxide and diethyl chloromalonate. The reaction of sodium 2-naphthoxide with diethyl bromomalonate afforded diethyl 2-naphthyloxymalonate and diethyl bis(2-naphthyloxy)malonate, both in poor yields.
There is still a lot of research devoted to this compound(SMILES：O=C(C1=CC=CO1)CC)Formula: C7H8O2, and with the development of science, more effects of this compound(3194-15-8) can be discovered.
Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem