Triethylamine → N-Benzoyl-3-azetidinone

Participants

Reaction Steps

To a stirred mixture of 2.5 g. of N-benzoyl-3-azetidinol, 21 g. of triethylamine in 35 ml. of DMSO, add rapidly, in a dropwise manner, a suspension of 7.0 g. of pyridine sulfur trioxide in 35 ml. of DMSO and stir for 15 minutes. Remove most of the DMSO in vacuo at 60° C and chromatograph the residue on 100 g. of silica gel. Elute with chlorform and collect 2.4 g. of the crude compound of this example from the front running yellow band. Recrystallize from isopropyl ether.

Provenance & Evidence