(3S)-3-Amino-4-hydroxy-5-(2,3,5,6-tetrafluoro-phenoxy)-pentanoic Acid Tert-Butyl Ester → (S,S)-3-[2-(6,7-dichloro-1-oxo-1H-isoquinolin-2-yl)-butyrylamino]-4-oxo-5-(2,3,5,6-tetrafluoro-phenoxy)-pentanoic Acid

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This compound was prepared using (S)-2-(6,7-dichloro-1-oxo-1H-isoquinolin-2-yl)-butyric acid (synthesized from 4,5-dichloro-2-formyl-benzoic acid [prepared as described in methods Q-S] using procedures similar to those described in methods A-E) and (3S)-3-amino-4-hydroxy-5-(2,3,5,6-tetrafluoro-phenoxy)-pentanoic acid tert-butyl ester (prepared as described in methods N-P) using procedures similar to those described in methods F, G and E. The title compound was isolated as a white solid (94% last step). IR (solid) 1784.5, 1734.7, 1650.1, 1610.2, 1585.4, 1515.7, 1490.8, 1426.0, 1216.9, 1172.1, 1092.5, 933.1 cm−1; 1H NMR (400 MHz, d6-DMSO) δ 0.80 (3H, t), 1.90-1.98 (1H, m), 2.04-2.12 (1H, m), 2.55-2.79 (2H, m), 4.56-4.71 (1H, m), 5.08-5.41 (3H, m), 6.67 (1H, d), 7.56-7.59 (2H, m), 8.07 (1H, brd s), 8.25 (1H, d), 8.85-8.95 (1H, 2×d), 12.73 (1H, brd s) ppm; 19F NMR (376 MHz, d6-DMSO) (proton decoupled) δ −140.93, −140.95, −140.99, −141.01, −141.04, −141.07, −141.10, −156.76, −156.79, −156.82, −156.85, −156.89, −156.91; MS ES (+): 577.14 (M+H).

Provenance & Evidence