Benzene → HCID 86736763, compound

Participants

Reaction Steps

2-[3-{4-(3-tert-Butoxycarbonylamino-3-carboxypropoxy)-phenylglyoxyloylamino}-2-oxo-1-azetidinyl]-2-(2-thienyl)-acetic acid (0.830 g.) was added to a mixture of benzene (4 ml.) and anisol (1 ml.), and to the mixture, there was added 2,2,2-trifluoroacetic acid (2 ml.) under ice-cooling. The mixture was stirred at the same temperature for 2.5 hours, and diethyl ether (50 ml.) was added to the reaction mixture, whereafter the stirring was continued under ice-cooling for half an hour. Insoluble materials were collected by filtration and suspended in ethyl acetate (30 ml.). The suspention was stirred for an hour, whereafter the insoluble materials were collected by filtration, washed with diethyl ether and then dried to give 2-[3-{4-(3-amino-3-carboxypropoxy)phenylglyoxyloylamino}-2-oxo-1-azetidinyl]-2-(2-thienyl)acetic acid (0.49 g.).

Provenance & Evidence