Water → tert-Butyl 3-{3-ethoxy-2-methyl-3-oxo-1-[4-(trifluoromethyl)phenyl]propyl}-7-[(methylsulfanyl)methyl]-1H-indole-1-carboxylate

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Reaction Conditions

Reaction Steps

1.60 g (3.07 mmol) of the compound from Example 26A were dissolved in tetrahydrofuran at −78° C., and 3.2 ml (6.44 mmol) of a 2N solution of lithium diisopropylamide in tetrahydrofuran/n-heptane were slowly added dropwise. After 5 min, 0.40 ml (6.44 mmol) of iodomethane was added, and the mixture was stirred at −78° C. for 2 h and then warmed to RT over the course of a further 2 h. The reaction solution was mixed with water, the phases were separated, and the aqueous phase was extracted twice with ethyl acetate. The combined organic phases were dried over sodium sulfate, the solid was filtered off, and the solvents were removed in vacuo. The crude product was purified by preparative HPLC (mobile phase: acetonitrile-water gradient) to result in 1.20 g (73% of theory) of the title compound as mixture of diasteromers.

Provenance & Evidence