Dichloromethane → N-[6-({[tert-butyl(dimethyl)silyl]oxy}methyl)pyridin-2-yl]4'-cyanobiphenyl-4-sulfonamide

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Reaction Steps

To a solution of dichloromethane (3 mL) was added 6-({[tert-butyl(dimethyl)silyl]oxy}methyl)pyridin-2-amine (0.15 g, 0.63 mmol), 4′-cyanobiphenyl4-sulfonyl chloride (0.18 g, 0.63 mmol) and pyridine (1.0 mL). The mixture was stirred for 3 hours then was washed with saturated sodium bicarbonate (2×30 mL) and aqueous hydrochloric acid (2×30 mL, 0.1 N). The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated in vacuo. Purification was done using silica gel chromatography eluting with hexane: ethyl acetate (1:1) and combined fractions were concentrated to afford the above-titled intermediate as a white solid (0.21 g, 76%). HPLC: Rt4.236 min. (81% area). 1H NMR (400 MHz, CDCl3), δ: 7.89 (d, J=8.3 Hz, 2H), 7.60 (d, J=8.3 Hz, 2H), 7.52-7.49 (m, 4H), 7.43 (t, J=7.6 Hz, 1H), 6.87 (d, J=8.6 Hz, 1H), 6.59 (d, J=7.3Hz, 1H), 6.22 (d, J=8.0 Hz, 1H), 4.55 (s, 2H), 0.82 (s, 9H), 0.05 (s, 6H); LRMS (ESI): m/z: 480.1.

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