Water → (3S,4aS,8aS)-2-[(2R, 3R)-3-(3-acetoxy-2-methylbenzoylamino)-2-hydroxy-4-phenylthiobutyl]decahydroisoquinoline-3-carboxylic acid t-butylamide

Participants

Reaction Steps

(3S, 4aS, 8aS)-2-((2R, 3R)-3-Amino-2-hydroxy-4-phenylthiobutyl)-decahydroisoquinoline-3-carboxylic acid t-butylamide (compound [14], 9.39 g) and sodium hydrogencarbonate (4.55 g, 54.2 mmol) were added to a suspension of water (40 ml) and ethyl acetate (40 ml). A solution of 3-acetoxy-2-methylbenzoyl chloride (4.37 g, 20.6 mmol) in ethyl acetate (40 ml) was dropwise added to the suspension with stirring under ice-cooling. The mixture was further stirred for one hour under ice-cooling and water (20 ml) was added. The organic layer was separated and washed with a saturated aqueous solution (20 ml) of sodium hydrogencarbonate. After drying over magnesium sulfate, the solvent was distilled away under reduced pressure to give (3S, 4aS, 8aS)-2-[(2R, 3R)-3-(3-acetoxy-2-methylbenzoylamino)-2-hydroxy-4-phenylthiobutyl]decahydroisoquinoline-3-carboxylic acid t-butylamide (12.7 g, yield 96%) as colorless amorphous.

Provenance & Evidence