2,6-Di-tert-butylpyridine → (R)-N-(2-chloro-3-nitro-4-iodophenyl)-2-trimethylsilyloxy-2-methyl-3,3,3-trifluoropropanamide

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Reaction Steps

4-Iodo-3-nitro-2-chloroaniline (Method 70) (1269 mg) and 2,6-di-t-butylpyridine (1.5 ml) were added to a solution of (S)-3,3,3-trifluoro-2-(trimethylsilyloxy)-2-methylpropanoyl chloride (prepared from (R)-3,3,3-trifluoro-2-hydroxy-2-methylpropionic acid (Method 25) as described in J. Med. Chem., 1999, 42, 2741-2746) (6 mmol) in DCM (40 ml). The mixture was stirred for 3 days at ambient temperature. The volatile material was removed by evaporation and the residue was purified by chromatography eluting with 10% EtOAc in hexane to give the title compound (1160 mg). NMR: 0.27 (s, 9H), 1.70 (s, 3H), 7.70 (d, 1H), 8.05 (d, 1H), 9.72 (brs, 1H); m/z 509.

Provenance & Evidence