Potassium Hydroxide → N-(8-indol-1-yl-octyl)-3,5-bis(3-chlorophenyl)4-hydroxybenzamide

Participants

Reaction Steps

A mixture of 5-[3,3″-Dichloro-5′-(8-indol-1-yl-octylcarbamoyl)-[1,1′;3′,1″]terphenyl-2′-yloxy]-pentanoic acid, ethyl ester (0.409 g, 0.573 mmol) and 1N KOH (1.15 ml) in THF (6 ml) and methanol (3 ml) was stirred under nitrogen. After 18 h, the reaction mixture was concentrated in vac. The residue was suspended in water (25 ml) and acidified with 2 N HCl (1.15 ml) then extracted with EtOAc (3×25 ml). The combined organics were washed with water (3×10 ml), brine (2×10 ml), dried over Na2SO4, filtered and the filtrate concentrated in vac and dried. The residue was purified by preparatory plate chromatography (50% EtOAc/Hex) to give the title compound as a light yellow foam (0.249 g, 63%); dec. >50° C.; 1H NMR (400 MHz, DMSO-d6) δ 1.12-1.32 (m, 12H), 1.44-1.53 (m, 2H), 1.67-1.76 (m, 2H), 1.87 (t, J=7.0 Hz, 2H), 3.16-3.27 (m, 4H), 4.12 (t, J=7.0 Hz, 2H), 6.37-6.38 (m, 1H), 6.94-6.99 (m, 1H), 7.06-7.10 (m, 1H), 7.31 (d, J=3.1 Hz, 1H), 7.40-7.52 (m, 6H), 7.56-7.59 (m, 2H), 7.66-7.69 (m, 2H), 7.87 (s, 2H), 8.52 (t, J=5.7 Hz, 1H), 11.85 (s, 1H); IR (KBr) 3400, 2940, 1710, 1630, 1550, 1220 cm−1; mass spectrum [(+)APCI], m/z 685 (M+H)+; Anal. Calcd. for C40H42Cl2N2O4: C, 70.07; H, 6.17; N, 4.09, Found: C, 69.66; H, 6.17; N, 3.85.

Provenance & Evidence