o-Cyclohexylphenol → HCID 57919274, 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-cyclohexylphenol and alkylating with 2-bromo-3-cyclopentyl-propionic acid methyl ester (Intermediate 10) afforded 2-[4-(2-cyclohexylphenoxy)-6-oxo-6H-pyridazin-1-yl]-3-cyclopentylpropionic acid (17.1 g, 72%) as a white solid; LC-MS [M+H+]=411.2; HPLC (0.17% trifluoroacetic acid in acetonitrile/water, 50%-100% acetonitrile, gradient, 1 mL/min, Venusil MP-C18, C18-15 cm×4.6 mm-5 μm), 254 nm, 95.8%, 214 nm, 97.2%. 1H-NMR (CDCl3, 300 MHz) δ 1.04-1.77 (m, 19H), 2.05-2.11 (m, 1H), 2.22-2.31 (m, 1H), 2.59-2.66 (t, 1H), 5.27-5.32 (dd, J=10.2 Hz, 4.8 Hz, 1H), 5.88-5.89 (d, J=2.4 Hz, 1H), 6.98-7.00 (m, 1H), 7.19-7.26 (m, 2H), 7.34-7.37 (m, 1H), 7.84-7.85 (d, J=2.7 Hz, 1H).

Provenance & Evidence