3-Chloro-4-dimethylamino-benzoic acid → 1-[2-(3-Chloro-4-dimethylamino-benzoylamino)-propionyl]-pyrrolidine-2-carboxylic acid (2-benzyloxy-5-oxo-tetrahydro-furan-3-yl)-amide

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Reaction Steps

Prepared from {2-[2-(2-benzyloxy-5-oxo-tetrahydro-furan-3-ylcarbmoyl)-pyrrolidin-1-yl]-1-methyl-2-oxo-ethyl}-carbamic acid tert-butyl ester and 3-chloro-4-dimethylamino-benzoic acid according to the procedure used to prepare 98a to afford 82 mg of title compound (44% yield). 1H-NMR (500 MHz, 1:1 CDCl3:CD3OD) δ 1.18-1.53 (m, 3H), 1.70-2.40 (m, 4H), 2.55-3.10 (m, 2H), 2.84 (s, 6H), 3.45-3.94 (m, 2H), 4.25-4.95 (m, 5H), 5.46 (s, 0.3H), 5.51 (s, 0.2H), 5.63 (d, 0.4H), 5.73 (d, 0.1H), 7.05 (d, 1H), 7.15-7.95 (m, 7H). Analytical HPLC: 11.85, 12.19 min. LC-MS (ES+): m/e=557.3 (M+H+).

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