Benzyl chloroformate → HCID 86599220, compound

Participants

Reaction Steps

Treatment of (±)-(5-chloro-7-thien-3-yl-2,3-dihydro-1-benzofuran-2-yl)methylamine (2.45 g, 8.11 mmol) with benzyl chloroformate (2.07 g, 12.15 mmol) and diisopropylethylamine (3.43 g, 24.32 mmol) generally according to the procedure described for Intermediate 12 provided 2.6 g (81%) of (±)-benzyl(5-chloro-7-thien-3-yl-2,3-dihydro-1-benzofuran-2-yl)methylcarbamate as a white solid. mp 90-92° C.; Anal. calcd. for C21H18ClNO3S: C, 63.07; H, 4.54; N, 3.50. Found: C, 63.44; H, 4.51; N, 3.43. Chiral HPLC separation of (±)-benzyl(5-chloro-7-thien-3-yl-2,3-dihydro-1-benzofuran-2-yl)methylcarbamate (Chiralpak AD, hexane:ethanol 1:1) provided two fractions. Fraction 1 (Rt=11.538 min, (Chiralpak AD, hexane:ethanol 1:1); Fraction 2 (Rt=17.694 min, (Chiralpak AD, hexane:ethanol 1:1).

Provenance & Evidence