Enantioselective synthesis of monocyclic .BETA.-lactams related to nocardicins via (2+2) cycloaddition reaction.

Abstract
Monocyclic .beta.-lactams related to nocardicins were enantioselectively synthesized from phthalimidoacetyl chloride and hexahydro-1,3,5-triazines (4) via a [2+2] cycloaddition reaction. The preparation and biological activity of some typical acyl derivatives are also described.