Potassium Carbonate → HCID 68966236, compound

Participants

Reaction Steps

Treatment of (±)-(7-bromo-2,3-dihydro-1-benzofuran-2-yl)methyl 4-methylbenzenesulfonate (4.81 g, 12.56 mmol) with 2-(2-isopropylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (4.63 g, 18.84 mmol, Intermediate 35), dichlorobis(tri-o-tolylphosphine)-palladium(II) (0.493 g, 0.627 mmol), and potassium carbonate (4.34 g, 31.38 mmol) generally according to the procedure described for Intermediate 37 provided (±)-[7-(2-isopropylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate. Treatment of the tosylate with sodium azide (2.10 g, 32.37 mmol) generally according to the procedure described for Intermediate 98 provided (±)-2-(azidomethyl)-7-(2-isopropylphenyl)-2,3-dihydro-1-benzofuran. Treatment of the azide with palladium on carbon (0.22 g, 10 wt. %) generally according to the procedure described for Example 1 provided 2.15 g (56%) of (±)-[7-(2-isopropylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methylamine as a white solid, hydrochloride salt. mp 202-204° C.; Anal. calcd. for C18H21NOHCl: C, 71.16; H, 7.30; N, 4.61. Found: C, 70.83; H, 7.34; N, 4.48.

Provenance & Evidence