The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Oxidation of certain ketones to acids by alkaline hypochlorite solution》. Authors are Farrar, Martin W.; Levine, Robert.The article about the compound:1-(Furan-2-yl)propan-1-onecas:3194-15-8,SMILESS:O=C(C1=CC=CO1)CC).Safety of 1-(Furan-2-yl)propan-1-one. Through the article, more information about this compound (cas:3194-15-8) is conveyed.
In general, 0.1 mole of the ketone was added dropwise to a stirred solution of 50 g. “”HTH”” [Mathieson Alkali Works trade name for Ca(OCl)2] at 60-70°, residual NaClO destroyed with aqueous NaHSO3, the solution extracted with Et2O, the aqueous phase acidified with HCl, and the crude acids recrystallized from H2O. The following acids (recrystallized from H2O) were prepared: 64% BzOH (from EtBz); 2-thiophenic, m. 129-30° (from Pr 2-thienyl ketone); 67% 5-methyl-2-thiophenic, m. 137-8° (from 5-methyl-2-propionylthiophene); and 59% 2-furoic, m. 131-2° (from Et 2-furyl ketone).
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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem