1,4-Dioxane → HCID 86687542, compound

Participants

Reaction Steps

To a microwave vial charged with (2-methoxy-4-(trifluoromethyl)phenyl)boronic acid (3.16 mg, 0.014 mmol), 4-chloro-N-(4-methoxybenzyl)-5-methyl-N-(thiazol-2-yl)quinoline-7-sulfonamide (6 mg, 0.013 mmol), potassium phosphate tribasic (3.24 μl, 0.039 mmol) and 1,1-bis[(di-t-butyl-p-methylaminophenyl]palladium(ii) chloride (0.924 mg, 1.304 μmol) was added dioxane (52.3 μl) and water (17.44 μl). The mixture was irradiated at 100° C. for 30 min affording conversion to desired product according to LC-MS, 4-(2-methoxy-4-(trifluoromethyl)phenyl)-N-(4-methoxybenzyl)-5-methyl-N-(thiazol-2-yl)quinoline-7-sulfonamide. m/z (ESI) 600.2 (M+H)+. The mixture was dried under reduced pressure. To the crude oil was added DCM (0.9 ml) and TFA (0.3 ml) was added at room temperature. After 1 hr of stirring, LC/MS indicated complete PMB cleavage. The mixture was dried under reduced pressure and purified with a 25 g (15 μm spherical silica) column ramping EtOAc in heptane (0 to 100%, 10% DCM throughout) providing product, obtained as a film. The material was lyophilized from MeOH/H2O providing 4-(2-methoxy-4-(trifluoromethyl)phenyl)-5-methyl-N-(thiazol-2-yl)quinoline-7-sulfonamide (2 mg, 4.17 μmol, 32.0% yield) as a yellow film. 1H NMR (500 MHz, DMSO-d6) δ ppm 3.75 (s, 3H) 6.86 (d, J=4.59 Hz, 1H) 7.28 (d, J=4.59 Hz, 1H) 7.38 (d, J=4.27 Hz, 1H) 7.41-7.48 (m, 2H) 7.49 (s, 1H) 7.63 (s, 1H) 8.32-8.39 (m, 1H) 8.99 (d, J=4.27 Hz, 1H). m/z (ESI) 480.2 (M+H)+.

Provenance & Evidence