1-[2-(4-Amino-3-chloro-benzoylamino)-propionyl]-pyrrolidine-2-carboxylic acid → 1-[2-(4-Amino-3-chloro-benzoylamino)-propionyl]-pyrrolidine-2-carboxylic acid (2-ethoxy-5-oxo-tetrahydro-furan-3-yl)-amide

Participants

Reaction Steps

Prepared from anti-(2-ethoxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid allyl ester and 97a following the method used for 98a to afford 175 mg of title compound (59%). 1H-NMR (500 MHz, 1:1 CDCl3:CD3OD) δ 1.10-1.28 (m, 3H), 1.42 (d, 0.6H), 1.46 (d, 2.4H), 1.75-2.45 (m, 4H), 2.45-2.70 (m, 1H), 2.80-3.05 (m, 1H), 3.50-3.95 (m, 4H), 4.20-4.75 (m, 3H), 4.75-4.90 (m, 1H), 5.32 (s, 0.8H), 5.38 (s, 0.2H), 6.80 (d, 1H), 7.55-7.84 (m, 2H). Analytical HPLC: 10.47 min. LC-MS (ES+): m/e=467.3 (M+H+).

Provenance & Evidence