Water → HCID 54048591, compound

Participants

Reaction Steps

Embodiment a: To a solution of 200 mg (0.261 mmol) of diphenylmethyl 2-[(3R, 4R)-4-[(benzothiazol-2yl)dithio]-3-phenoxyacetamido-2-oxo-azetidin-1-yl]3-fluorosulfonyloxy-2-butenoate (XXd) in 2.0 mL of dry dichloromethane at room temperature was added, dropwise, 38.26 μL (0.274 mmol) of triethylamine. The solution was stirred at ambient temperature for 25 min. HPLC indicated disappearance of the starting material and formation of the product (retention time=4.74 min, 2.0 mL/min, 70% acetonitrile: 30% water, reversed phase C-18 column). The resultant solution was poured into water. The organic layer was separated and further washed with brine (10 mL) and 5% HCl solution (10 mL). It was subsequently dried (magnesium sulfate) and concentrated to give 139.09 mg (81%) of the title product as a light brown foam, which was further purified by recrystallization from isopropanol.

Provenance & Evidence