Phosphorus trichloride → Benzyl 3-chloro-1-azabicyclo[3.2.0]hept-2-en-7-one-2carboxylate

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Reaction Steps

Benzyl 1-azabicyclo[3.2.0]heptane-3,7-dione-2-carboxylate (26 mg, 0.1 mmol) in anhydrous DMF (0.5 ml) containing PCl3 (27 mg, 0.2 mmol) is kept at 25° C. for 5 hrs. The mixture is diluted with toluene (5 ml), washed with H2O (5×1 ml) 5% HCl (2 ml), 5% NaHCO3 (2 ml) and brine, dried with MgSO4, and filtered. Evaporation of the solvent in vacuo provides crude benzyl 3-chloro-1-azabicyclo[3.2.0]hept-2-en-7-one-2-carboxylate.

Provenance & Evidence