Sodium Chloride → HCID 66757963, compound

Participants

Reaction Steps

To a solution of the product of Example 315 (250 mg) in THF (3.0 ml) was added LDA (0.51 mol/L THF-hexane solution, 3.0 ml) at −78° C., and the mixture stirred at room temperature for 20 minutes. The reaction mixture was cooled to −78° C. again, and added ethyl cyanoformate (76 μl), stirred at room temperature for 1 hour. Saturated aqueous ammonium chloride and aqueous sodium chloride were added to the mixture, and the aqueous layer was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride, and dried with magnesium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography eluting with chloroform-methanol (10:1) to give the titled compound (280 mg).

Provenance & Evidence