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

Participants

Reaction Steps

Prepared from 97a and syn-(2-cyclopentyloxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford the title compound as an off-white solid (0.19 g, 59% yield). 1H-NMR (500 MHz, CDCl3) δ 1.2-2.4 (m, 15H), 2.4-3.1 (m, 2H), 3.6-3.9 (m, 2H), 4.2-4.4 (m, 2H), 4.5-5.0 (m, 4H), 5.40 (d, J=5.0 Hz, 0.35H), 5.55 (d, J=5.0 Hz, 0.65H), 6.8-8.2 (m, 5H) ppm. Analytical HPLC (C18column) 14.065 min. LC-MS (ES+): m/e=507 (M+H).

Provenance & Evidence