Trifluoroacetic acid → 4-(3-furanyl)-2-methyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazole

関与物質

反応手順

A mixture of 4-bromo-2-methyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazole, prepared as described in Example 62 (200 mg, 0.427 mmol), 3-furanyl boronic acid (47.8 mg, 0.427 mmol), sodium carbonate (91 mg, 0.854 mmol) and PdCl2(dppf)-CH2Cl2 adduct (34.9 mg, 0.043 mmol) in 1,2-Dimethoxyethane (DME) (2.5 mL) and Water (0.5 mL) was irradiated in a microwave reactor for 1 h at 100° C. The mixture was poured into water and extracted with EtOAc. The organic phase was washed with brine, dried over Na2SO4 and evaporated. Only partial conversion (ca. 50%) was observed by LC/MS analysis. The residue was purified by RP-HPLC (Gilson, 25-65% Acetonitrile in water plus 0.1% TFA) to the desired product (28 mg, 0.060 mmol, 14.11% yield) as a white powder (separation from impurity was difficult. The head of the peak was discarded decreasing the overall yield, in addition to the partial conversion observed). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.57 (s, 1H), 7.58 (d, J=7.58 Hz, 1H), 7.55 (t, J=1.52 Hz, 1H), 7.09-7.15 (m, 2H), 7.02 (d, J=1.26 Hz, 1H), 6.52 (d, J=7.83 Hz, 1H), 6.48 (d, J=2.02 Hz, 1H), 5.29 (s, 2H), 3.80-3.97 (m, 4H), 3.07-3.21 (m, 4H), 2.57 (s, 3H), 2.52 (s, 3H). MS (ES+) m/e 456.0 [M+H]+

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