With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.496-16-2,2,3-Dihydrobenzo[b]furan,as a common compound, the synthetic route is as follows.
To a solution of 2,3-dihydrobenzofuran (1 g, 8.3mmol) in DCM (10mL) was added acetyl chloride (1.3g, 16.6mmol) and AICI3 (3.3g, 24.6mmol) slowly at -10C. The reaction mixture was stirred at -10C for 3h. The TLC showed the reaction to be complete. The reaction mixture was diluted with 5% aqueous HCI (10ml_) and extracted with DCM (3×1 OmL). The combined organic layers were washed with saturated aqueous bicarbonate solution (100ml_), brine (100ml_), dried (Na2S04), filtered and concentrated under reduced pressure to afford 1-(2,3- dihydrobenzofuran-5-yl)ethan-1-one as a brown liquid. Yield: 1.34g (97%); MS (ESI+) for CHNOS m/z 163.0[M+H]+; 1 H NMR (400 MHz, CDCI3): <5 7.86 (s, 1 H), 7.79 (d, J = 8.4Hz, 1 H), 6.80 (d, J = 8.4 Hz, 1 H), 4.66 (t, J = 8.8 Hz, 2H), 3.25 (t, J = 8.8 Hz, 2H), 2.52 (s, 3H)., 496-16-2
As the paragraph descriping shows that 496-16-2 is playing an increasingly important role.