The compound O-acryloylated 2,3-dihydrobenzo[b]furan-5-ol ( 2 ) described in the title (chemical formula C 19 H 18 O 4 ) was synthesized through the acryloylation reaction in anhydrous dichloromethane from the corresponding trans -2-(4-methoxyphenyl)-3-methyl-2,3-dihydrobenzo[b]furan-5-ol derivative ( 1 ), an adduct easily obtained using the Lewis acid-promoted formal [3 + 2] cycloaddition reaction. Molecular characterization was performed by Fourier Transform-Infrared (FT-IR), Gas Chromatography-Mass Spectrometry (GC-MS), 1 H and 13 C NMR and crystallographic characterization was carried out by X-ray diffraction (XRD) of polycrystalline samples. The title compound crystallized in a monoclinic system and unit-cell parameters are reported [ a = 8.067(2) Å, b = 8.803(2) Å, c = 22.405(5) Å, β = 91.62(3)°, unit-cell volume V = 1590.7(6) Å 3 and Z = 4]. All measured lines were indexed with the P 2 1 / c (No. 14) space group.