Pyridine → Carbamic acid, [2-[4-[(phenylsulfonyl)amino]phenoxy]ethyl]-, 1,1-dimethylethyl ester

Participants

Reaction Steps

To a solution of 314 mg(1.246 mmole) of t-BOC amine from Example 216 in 10 mL of methylene chloride was added pyridine (147 mg, 1.869 mmol, 1.5 eq) followed by benzenesulfonyl chloride (242 mg, 1.370 mmol, 1.1 eq) at room temperature. The reaction mixture was stirred at room temperature overnight and then partitioned between water and chloroform. The organic layer was separated and washed with 1N hydrochloric acid, water and brine and then dried over anhydrous sodium sulfate. The solution was filtered, concentrated and the residue was purified by flash colunto chromatography (eluant 2:1 hexanes/ethyl acetate) to give 248 mg (51%) of the product: 1H NMR (200 MHz, CDCl3) δ8.01 (d, 1H, J=8Hz), 7.67 (d, 2H, J=8Hz), 6.92 (d, 2H, J=9Hz), 6.72 (s, 1H, N-H), 6.70 (d, 2H, J=9Hz), 4.90 (bs, 1H, N-H), 3.89 (t, 2H, J=5.0Hz), 3.40 (q, 2H, J=5.0Hz), 1.40 (s, 9H).

Provenance & Evidence