Sodium hydride → [3-[(tert-Butoxycarbonyl-methyl-amino)-methyl]-4-(propane-2-sulfonyl)-phenyl]-carbamic acid 2-(4-bromo-2-ethyl-phenyl)-ethyl ester

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Reaction Steps

NaH (190 mg, 4.7 mmol) was added in one portion to a solution of 16G (547 mg, 1.2 mmol) and 36B (1000 mg, 4.4 mmol) in THF (20 mL) at −40° C. The reaction was warmed slowly to ambient temperature over 2 h and stirred for 15 h. The reaction was quenched with saturated citric acid and diluted with EtOAc. The mixture washed with brine, dried over Na2SO4 and concentrated in vacuo. The crude product was purified by flash chromatography (0% to 100% EtOAc in hexanes) to afford 43A (650 mg, 92%) as a yellow solid. MS (ESI) m/z 597.1/599.1 (M+H)+.

Provenance & Evidence