Ethyl Acetate → HCID 20164974, compound

Participants

Reaction Steps

To a suspension of 3.4 g of 2-(1-naphthyl)-5-oxo-6-phthalimidoperhydro-1,4-thiazepine [prepared as described in step (e) above] in a mixture of 34 ml of dimethylformamide and 10 ml of hexamethylphosphoric triamide were added dropwise 2.25 ml of t-butyl bromoacetate and then, bit by bit, 609 mg of a 55% w/w suspension of sodium hydride in oil at 0°-5° C., under a nitrogen stream. After this addition, the reaction mixture was stirred for 16 hours at room temperature. Ethyl acetate and water were then added to the reaction mixture. The ethyl acetate layer was separated, washed with water and dried over anhydrous magnesium sulfate, and the solvnet was distilled off. The residue was subjected to silica gel column chromatography using a 2:1 by volume mixture of cyclohexane and ethyl acetate as eluent, to give 2.6 g of the title compound as crystals, melting at 211°-213° C.

Provenance & Evidence