Benzyl chloroformate → HCID 90775856, compound

Participants

Reaction Steps

Treatment of (±)-[7-(3-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methanamine (1.76 g, 6.38 mmol) with diisopropylethylamine (2.47 g, 19.17 mmol) followed by benzyl chloroformate (1.19 g, 7.02 mmol) generally according to the procedure described for Intermediate 12 provided 1.4 g (58%) of (±)-benzyl[7-(3-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methylcarbamate as a clear oil. Rf=0.68 (silica, ethyl acetate:hexanes 1:2); Anal. calcd. for C24H23NO3: C, 77.19; H, 6.20; N, 3.75. Found: C, 76.88H, 6.25; N, 3.51. Chiral HPLC separation of (±)-benzyl[7-(3-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methylcarbamate (Chiralpak AD, ethanol:hexane 1:1) provided two fractions. Fraction 1 (Rt=10.439 min, Chiralpak AD, ethanol:hexane 1:1); Fraction 2 (Rt=11.833 min, Chiralpak AD ethanol:hexane 1:1).

Provenance & Evidence