title: Enantioselective nucleophilic catalysis: the synthesis of aza-beta-lactams through [2+2] cycloadditions of ketenes with azo compounds.
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: Jacob M
authors.initials: JM
authors.lastname: Berlin
authors.forename: Gregory C
authors.initials: GC
authors.lastname: Fu
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D005030:Ethylenes / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D047090:beta-Lactams / Q000138:chemical synthesis*
chemical_list: D001391:Azo Compounds; D005030:Ethylenes; D007659:Ketones; D047090:beta-Lactams; C008223:ketene