2-Fluorophenol → HCID 57919288, compound

Participants

Reaction Steps

In an analogous manner to the stepwise sequence outlined in intermediate 19, starting from 4,5-dichloro-2-(tetrahydropyran-2-yl)-2H-pyridazin-3-one (Intermediate 20) and 2-fluoro-phenol and alkylating with 2-bromo-3-cyclopentyl-propionic acid methyl ester (Intermediate 10) afforded 3-cyclopentyl-2-[4-(2-fluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-propionic acid (10.2 g, 70%); ESI-MS 347 [M+H+]; HPLC: >98% (purity). 1H-NMR (300 MHz, CDCl3) δ 7.91 (s, 1H), 7.18-7.33 (m, 4H), 5.98 (s, 1H), 5.51-5.56 (m, 1H), 2.30-2.40 (m, 1H), 2.07-2.16 (m, 1H), 1.50-1.80 (m, 7H), 1.11-1.21 (m, 2H).

Provenance & Evidence