Triethylamine → HCID 66757518, compound

Participants

Reaction Steps

The product of Example 61D (39.8 mmol) in CH2Cl2(200 mL) at 0° C. was treated with triethylamine (116.7 mL, 0.120 mol) followed by 2-nitrobenzenesulfonyl chloride (19.5 g, 88.0 mmol). The ice-bath was removed and the solution stirred at ambient temperature for 20 hours. The mixture was concentrated under reduced pressure and the residue dissolved in a mixture of ethanol and 5% aqueous NaOH (2:1, 200 mL). The mixture was stirred for 30 minutes, concentrated under reduced pressure, diluted with ethyl acetate (200 mL) and the layers were separated. The organic layer was dried over Na2SO4, filtered, and the filtrate concentrated under reduced pressure. The residue was purified via chromatography (SiO2), 50% ethyl acetate/hexanes) to provide the title compound (111.0 g, 27.7 mmol, 70% yield for two steps). MS (DCI/NH3) m/z 415 (M+NH4)+.

Provenance & Evidence