Sodium Butyrate → O-Butanoyloxymethyl S-Ethyl Carbonothioate

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Reaction Steps

Crude 5b (23.6 g, 96 mmol) is added during 30 min to a stirred suspension of sodium butanoate (10.5 g, 96 mmol) in dry DMF (125 mL) at -20° C. followed by stirring overnight at ambient temperature. After filtration and washing with DMF (5 mL) and Et2O (10 mL),Et2O (250 mL) and ice-cold H2O (100 mL) are added to the combined filtrates. The aqueous phase is separated and extracted with Et2O (100 mL). The combined organic phases are washed (all solutions ice-cold) with 5% aqueous NaHCO3 (50 mL), H2O (50 mL), 0.01N HCl (100 mL), and H2O (2×50 mL). After drying (MgSO4) and evaporation of solvents the residue is distilled to yield 15.0 g (76%) of 6db, bp 75°-80° C./0.5 mbar.

Provenance & Evidence