FREE-RADICAL ANNELATION IN THE SYNTHESIS OF BICYCLIC β-LACTAMS. 2. ALTERNATIVE USE OF CHLORO-, PHENYLSELENO-, AND PHENYLTHIO-FUNCTIONALITIES AS FREE-RADICAL PRECURSORS

Article abstract of DOI:10.1016/S0040-4039(01)92972-7

The tributyltin hydride-azobisisobutyronitrile induced cyclization of N-chloromethyl-, N-phenylselenomethyl-, and N-phenylthiomethyl-4-allyloxy-2-azetidinones to 9-oxo-6-oxa-1-aza-bicyclo<5.2.0>nonane described.