Hydrochloric Acid → (+)-1-(4-Phenyl-2,3-dihydro-1-benzofuran-2-yl)methanamine

Participants

Reaction Steps

Treatment of (±)-(4-phenyl-2,3-dihydro-1-benzofuran-2-yl)methyl 4-methylbenzenesulfonate (1.36 g, 3.57 mmol) with sodium azide (0.929 g, 14.29 mmol) generally according to the procedure described for intermediate 98 afforded (±)-(4-phenyl-2,3-dihydro-1-benzofuran-2-yl)methyl azide. The azide was dissolved in ethanol (50 mL) and palladium on carbon (0.083 g, 10 wt. %) was added and the reaction mixture was shaken under an H2 atmosphere (50 psi) for 6 h. The reaction mixture was filtered (celite) and the solvent removed in vacuo to provide a colorless oil. The oil was re-dissolved in isopropanol (3 mL) and hydrogen chloride (1.0 N in diethyl ether, 10.0 mL) was added. The resulting precipitate was filtered, washed (diethyl ether), and dried to afford 0.700 g (94%) of (±)-1-(4-phenyl-2,3-dihydro-1-benzofuran-2-yl)methanamine as a white solid, hydrochloride salt. mp 229-230° C.; Anal. calcd. for C15H15NOHCl: C, 68.83; H, 6.16; N, 5.35. Found: C, 66.11; H, 6.25; N, 5.02.

Provenance & Evidence