7-(2-bromoethyl)-2,3-dihydro Benzofuran

7-(2-Bromoethyl)-2,3-dihydrobenzofuran is a substituted benzofuran derivative featuring a partially saturated tetrahydrofuran ring fused to a benzene core, with a 2-bromoethyl substituent at the 7-position. This structural motif diverges from Darifenacin by incorporating a brominated ethyl chain, likely arising from alkylation during synthetic pathways. The bromide functionality enhances electrophilic character, promoting regioselective substitution in intermediate stages. Serves as an HPLC reference standard for quantifying process-related impurities in Darifenacin formulations.